Add m-esr52 at 52.6.0

1 files changed, 3461 insertions, 0 deletions

diff --git a/dom/base/nsIDocument.h b/dom/base/nsIDocument.h
new file mode 100644
index 0000000000..5b10c9914c
--- /dev/null
+++ b/dom/base/nsIDocument.h
@@ -0,0 +1,3461 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#ifndef nsIDocument_h___
+#define nsIDocument_h___
+
+#include "mozFlushType.h"                // for enum
+#include "nsAutoPtr.h"                   // for member
+#include "nsCOMArray.h"                  // for member
+#include "nsCRT.h"                       // for NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW
+#include "nsCompatibility.h"             // for member
+#include "nsCOMPtr.h"                    // for member
+#include "nsGkAtoms.h"                   // for static class members
+#include "nsIDocumentObserver.h"         // for typedef (nsUpdateType)
+#include "nsILoadGroup.h"                // for member (in nsCOMPtr)
+#include "nsINode.h"                     // for base class
+#include "nsIScriptGlobalObject.h"       // for member (in nsCOMPtr)
+#include "nsIServiceManager.h"
+#include "nsIUUIDGenerator.h"
+#include "nsPIDOMWindow.h"               // for use in inline functions
+#include "nsPropertyTable.h"             // for member
+#include "nsDataHashtable.h"             // for member
+#include "nsURIHashKey.h"                // for member
+#include "mozilla/net/ReferrerPolicy.h"  // for member
+#include "nsWeakReference.h"
+#include "mozilla/UseCounter.h"
+#include "mozilla/WeakPtr.h"
+#include "Units.h"
+#include "nsContentListDeclarations.h"
+#include "nsExpirationTracker.h"
+#include "nsClassHashtable.h"
+#include "prclist.h"
+#include "mozilla/UniquePtr.h"
+#include "mozilla/CORSMode.h"
+#include "mozilla/LinkedList.h"
+#include "mozilla/StyleBackendType.h"
+#include "mozilla/StyleSheet.h"
+#include "mozilla/TimeStamp.h"
+#include <bitset>                        // for member
+
+#ifdef MOZILLA_INTERNAL_API
+#include "mozilla/dom/DocumentBinding.h"
+#else
+namespace mozilla {
+namespace dom {
+class ElementCreationOptionsOrString;
+} // namespace dom
+} // namespace mozilla
+#endif // MOZILLA_INTERNAL_API
+
+class gfxUserFontSet;
+class imgIRequest;
+class nsAString;
+class nsBindingManager;
+class nsIDocShell;
+class nsDocShell;
+class nsDOMNavigationTiming;
+class nsFrameLoader;
+class nsHTMLCSSStyleSheet;
+class nsHTMLDocument;
+class nsHTMLStyleSheet;
+class nsIAtom;
+class nsIBFCacheEntry;
+class nsIChannel;
+class nsIContent;
+class nsIContentSink;
+class nsIDocShell;
+class nsIDocShellTreeItem;
+class nsIDocumentEncoder;
+class nsIDocumentObserver;
+class nsIDOMDocument;
+class nsIDOMDocumentType;
+class nsIDOMElement;
+class nsIDOMNodeFilter;
+class nsIDOMNodeList;
+class nsIHTMLCollection;
+class nsILayoutHistoryState;
+class nsILoadContext;
+class nsIObjectLoadingContent;
+class nsIObserver;
+class nsIPresShell;
+class nsIPrincipal;
+class nsIRequest;
+class nsIRunnable;
+class nsIStreamListener;
+class nsIStructuredCloneContainer;
+class nsIURI;
+class nsIVariant;
+class nsViewManager;
+class nsPresContext;
+class nsRange;
+class nsScriptLoader;
+class nsSMILAnimationController;
+class nsTextNode;
+class nsWindowSizes;
+class nsDOMCaretPosition;
+class nsViewportInfo;
+class nsIGlobalObject;
+struct nsCSSSelectorList;
+
+namespace mozilla {
+class CSSStyleSheet;
+class ErrorResult;
+class EventStates;
+class PendingAnimationTracker;
+class StyleSetHandle;
+class SVGAttrAnimationRuleProcessor;
+template<typename> class OwningNonNull;
+
+namespace css {
+class Loader;
+class ImageLoader;
+class Rule;
+} // namespace css
+
+namespace dom {
+class Animation;
+class AnonymousContent;
+class Attr;
+class BoxObject;
+class CDATASection;
+class Comment;
+struct CustomElementDefinition;
+class DocGroup;
+class DocumentFragment;
+class DocumentTimeline;
+class DocumentType;
+class DOMImplementation;
+class DOMIntersectionObserver;
+class DOMStringList;
+class Element;
+struct ElementCreationOptions;
+struct ElementRegistrationOptions;
+class Event;
+class EventTarget;
+class FontFaceSet;
+class FrameRequestCallback;
+struct FullscreenRequest;
+class ImageTracker;
+class ImportManager;
+class HTMLBodyElement;
+struct LifecycleCallbackArgs;
+class Link;
+class Location;
+class MediaQueryList;
+class GlobalObject;
+class NodeFilter;
+class NodeIterator;
+enum class OrientationType : uint32_t;
+class ProcessingInstruction;
+class Promise;
+class StyleSheetList;
+class SVGDocument;
+class SVGSVGElement;
+class Touch;
+class TouchList;
+class TreeWalker;
+class XPathEvaluator;
+class XPathExpression;
+class XPathNSResolver;
+class XPathResult;
+template<typename> class Sequence;
+
+template<typename, typename> class CallbackObjectHolder;
+typedef CallbackObjectHolder<NodeFilter, nsIDOMNodeFilter> NodeFilterHolder;
+
+} // namespace dom
+} // namespace mozilla
+
+#define NS_IDOCUMENT_IID \
+{ 0xce1f7627, 0x7109, 0x4977, \
+  { 0xba, 0x77, 0x49, 0x0f, 0xfd, 0xe0, 0x7a, 0xaa } }
+
+// Enum for requesting a particular type of document when creating a doc
+enum DocumentFlavor {
+  DocumentFlavorLegacyGuess, // compat with old code until made HTML5-compliant
+  DocumentFlavorHTML, // HTMLDocument with HTMLness bit set to true
+  DocumentFlavorSVG, // SVGDocument
+  DocumentFlavorPlain, // Just a Document
+};
+
+// Enum for HSTS priming states
+enum class HSTSPrimingState {
+  eNO_HSTS_PRIMING = 0,    // don't do HSTS Priming
+  eHSTS_PRIMING_ALLOW = 1, // if HSTS priming fails, allow the load to proceed
+  eHSTS_PRIMING_BLOCK = 2  // if HSTS priming fails, block the load
+};
+
+// Document states
+
+// RTL locale: specific to the XUL localedir attribute
+#define NS_DOCUMENT_STATE_RTL_LOCALE              NS_DEFINE_EVENT_STATE_MACRO(0)
+// Window activation status
+#define NS_DOCUMENT_STATE_WINDOW_INACTIVE         NS_DEFINE_EVENT_STATE_MACRO(1)
+
+// Some function forward-declarations
+class nsContentList;
+
+//----------------------------------------------------------------------
+
+// Document interface.  This is implemented by all document objects in
+// Gecko.
+class nsIDocument : public nsINode
+{
+  typedef mozilla::dom::GlobalObject GlobalObject;
+
+public:
+  typedef mozilla::net::ReferrerPolicy ReferrerPolicyEnum;
+  typedef mozilla::dom::Element Element;
+  typedef mozilla::dom::FullscreenRequest FullscreenRequest;
+
+  NS_DECLARE_STATIC_IID_ACCESSOR(NS_IDOCUMENT_IID)
+  NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW
+
+#ifdef MOZILLA_INTERNAL_API
+  nsIDocument();
+#endif
+
+  // This helper class must be set when we dispatch beforeunload and unload
+  // events in order to avoid unterminate sync XHRs.
+  class MOZ_RAII PageUnloadingEventTimeStamp
+  {
+    nsCOMPtr<nsIDocument> mDocument;
+    bool mSet;
+
+  public:
+    explicit PageUnloadingEventTimeStamp(nsIDocument* aDocument)
+      : mDocument(aDocument)
+      , mSet(false)
+    {
+      MOZ_ASSERT(aDocument);
+      if (mDocument->mPageUnloadingEventTimeStamp.IsNull()) {
+        mDocument->SetPageUnloadingEventTimeStamp();
+        mSet = true;
+      }
+    }
+
+    ~PageUnloadingEventTimeStamp()
+    {
+      if (mSet) {
+        mDocument->CleanUnloadEventsTimeStamp();
+      }
+    }
+  };
+
+  /**
+   * Let the document know that we're starting to load data into it.
+   * @param aCommand The parser command. Must not be null.
+   *                 XXXbz It's odd to have that here.
+   * @param aChannel The channel the data will come from. The channel must be
+   *                 able to report its Content-Type.
+   * @param aLoadGroup The loadgroup this document should use from now on.
+   *                   Note that the document might not be the only thing using
+   *                   this loadgroup.
+   * @param aContainer The container this document is in.  This may be null.
+   *                   XXXbz maybe we should make it more explicit (eg make the
+   *                   container an nsIWebNavigation or nsIDocShell or
+   *                   something)?
+   * @param [out] aDocListener the listener to pump data from the channel into.
+   *                           Generally this will be the parser this document
+   *                           sets up, or some sort of data-handler for media
+   *                           documents.
+   * @param aReset whether the document should call Reset() on itself.  If this
+   *               is false, the document will NOT set its principal to the
+   *               channel's owner, will not clear any event listeners that are
+   *               already set on it, etc.
+   * @param aSink The content sink to use for the data.  If this is null and
+   *              the document needs a content sink, it will create one based
+   *              on whatever it knows about the data it's going to load.
+   *              This MUST be null if the underlying document is an HTML
+   *              document. Even in the XML case, please don't add new calls
+   *              with non-null sink.
+   *
+   * Once this has been called, the document will return false for
+   * MayStartLayout() until SetMayStartLayout(true) is called on it.  Making
+   * sure this happens is the responsibility of the caller of
+   * StartDocumentLoad().
+   */
+  virtual nsresult StartDocumentLoad(const char* aCommand,
+                                     nsIChannel* aChannel,
+                                     nsILoadGroup* aLoadGroup,
+                                     nsISupports* aContainer,
+                                     nsIStreamListener **aDocListener,
+                                     bool aReset,
+                                     nsIContentSink* aSink = nullptr) = 0;
+  virtual void StopDocumentLoad() = 0;
+
+  virtual void SetSuppressParserErrorElement(bool aSuppress) {}
+  virtual bool SuppressParserErrorElement() { return false; }
+
+  virtual void SetSuppressParserErrorConsoleMessages(bool aSuppress) {}
+  virtual bool SuppressParserErrorConsoleMessages() { return false; }
+
+  /**
+   * Signal that the document title may have changed
+   * (see nsDocument::GetTitle).
+   * @param aBoundTitleElement true if an HTML or SVG <title> element
+   * has just been bound to the document.
+   */
+  virtual void NotifyPossibleTitleChange(bool aBoundTitleElement) = 0;
+
+  /**
+   * Return the URI for the document. May return null.
+   *
+   * The value returned corresponds to the "document's address" in
+   * HTML5.  As such, it may change over the lifetime of the document, for
+   * instance as a result of the user navigating to a fragment identifier on
+   * the page, or as a result to a call to pushState() or replaceState().
+   *
+   * https://html.spec.whatwg.org/multipage/dom.html#the-document%27s-address
+   */
+  nsIURI* GetDocumentURI() const
+  {
+    return mDocumentURI;
+  }
+
+  /**
+   * Return the original URI of the document.  This is the same as the
+   * document's URI unless that has changed from its original value (for
+   * example, due to history.pushState() or replaceState() being invoked on the
+   * document).
+   *
+   * This method corresponds to the "creation URL" in HTML5 and, once set,
+   * doesn't change over the lifetime of the document.
+   *
+   * https://html.spec.whatwg.org/multipage/webappapis.html#creation-url
+   */
+  nsIURI* GetOriginalURI() const
+  {
+    return mOriginalURI;
+  }
+
+  /**
+   * Set the URI for the document.  This also sets the document's original URI,
+   * if it's null.
+   */
+  virtual void SetDocumentURI(nsIURI* aURI) = 0;
+
+  /**
+   * Set the URI for the document loaded via XHR, when accessed from
+   * chrome privileged script.
+   */
+  virtual void SetChromeXHRDocURI(nsIURI* aURI) = 0;
+
+  /**
+   * Set the base URI for the document loaded via XHR, when accessed from
+   * chrome privileged script.
+   */
+  virtual void SetChromeXHRDocBaseURI(nsIURI* aURI) = 0;
+
+  /**
+   * Set referrer policy and upgrade-insecure-requests flags
+   */
+  virtual void ApplySettingsFromCSP(bool aSpeculative) = 0;
+
+  /**
+   * Return the referrer policy of the document. Return "default" if there's no
+   * valid meta referrer tag found in the document.
+   */
+  ReferrerPolicyEnum GetReferrerPolicy() const
+  {
+    return mReferrerPolicy;
+  }
+
+  /**
+   * GetReferrerPolicy() for Document.webidl.
+   */
+  uint32_t ReferrerPolicy() const
+  {
+    return GetReferrerPolicy();
+  }
+
+  /**
+   * If true, this flag indicates that all mixed content subresource
+   * loads for this document (and also embeded browsing contexts) will
+   * be blocked.
+   */
+  bool GetBlockAllMixedContent(bool aPreload) const
+  {
+    if (aPreload) {
+      return mBlockAllMixedContentPreloads;
+    }
+    return mBlockAllMixedContent;
+  }
+
+  /**
+   * If true, this flag indicates that all subresource loads for this
+   * document need to be upgraded from http to https.
+   * This flag becomes true if the CSP of the document itself, or any
+   * of the document's ancestors up to the toplevel document makes use
+   * of the CSP directive 'upgrade-insecure-requests'.
+   */
+  bool GetUpgradeInsecureRequests(bool aPreload) const
+  {
+    if (aPreload) {
+      return mUpgradeInsecurePreloads;
+    }
+    return mUpgradeInsecureRequests;
+  }
+
+  void SetReferrer(const nsACString& aReferrer) {
+    mReferrer = aReferrer;
+  }
+
+  /**
+   * Check to see if a subresource we want to load requires HSTS priming
+   * to be done.
+   */
+  HSTSPrimingState GetHSTSPrimingStateForLocation(nsIURI* aContentLocation) const
+  {
+    HSTSPrimingState state;
+    if (mHSTSPrimingURIList.Get(aContentLocation, &state)) {
+      return state;
+    }
+    return HSTSPrimingState::eNO_HSTS_PRIMING;
+  }
+
+  /**
+   * Add a subresource to the HSTS priming list. If this URI is
+   * not in the HSTS cache, it will trigger an HSTS priming request
+   * when we try to load it.
+   */
+  void AddHSTSPrimingLocation(nsIURI* aContentLocation, HSTSPrimingState aState)
+  {
+    mHSTSPrimingURIList.Put(aContentLocation, aState);
+  }
+
+  void ClearHSTSPrimingLocation(nsIURI* aContentLocation)
+  {
+    mHSTSPrimingURIList.Remove(aContentLocation);
+  }
+
+  /**
+   * Set the principal responsible for this document.
+   */
+  virtual void SetPrincipal(nsIPrincipal *aPrincipal) = 0;
+
+  /**
+   * Return the LoadGroup for the document. May return null.
+   */
+  already_AddRefed<nsILoadGroup> GetDocumentLoadGroup() const
+  {
+    nsCOMPtr<nsILoadGroup> group = do_QueryReferent(mDocumentLoadGroup);
+    return group.forget();
+  }
+
+  /**
+   * Return the fallback base URL for this document, as defined in the HTML
+   * specification.  Note that this can return null if there is no document URI.
+   *
+   * XXXbz: This doesn't implement the bits for about:blank yet.
+   */
+  nsIURI* GetFallbackBaseURI() const
+  {
+    if (mIsSrcdocDocument && mParentDocument) {
+      return mParentDocument->GetDocBaseURI();
+    }
+    return mDocumentURI;
+  }
+
+  /**
+   * Return the base URI for relative URIs in the document (the document uri
+   * unless it's overridden by SetBaseURI, HTML <base> tags, etc.).  The
+   * returned URI could be null if there is no document URI.  If the document is
+   * a srcdoc document and has no explicit base URL, return the parent
+   * document's base URL.
+   */
+  nsIURI* GetDocBaseURI() const
+  {
+    if (mDocumentBaseURI) {
+      return mDocumentBaseURI;
+    }
+    return GetFallbackBaseURI();
+  }
+  virtual already_AddRefed<nsIURI> GetBaseURI(bool aTryUseXHRDocBaseURI = false) const override;
+
+  virtual void SetBaseURI(nsIURI* aURI) = 0;
+
+  /**
+   * Get/Set the base target of a link in a document.
+   */
+  virtual void GetBaseTarget(nsAString &aBaseTarget) = 0;
+  void SetBaseTarget(const nsString& aBaseTarget) {
+    mBaseTarget = aBaseTarget;
+  }
+
+  /**
+   * Return a standard name for the document's character set.
+   */
+  const nsCString& GetDocumentCharacterSet() const
+  {
+    return mCharacterSet;
+  }
+
+  /**
+   * Set the document's character encoding. |aCharSetID| should be canonical.
+   * That is, callers are responsible for the charset alias resolution.
+   */
+  virtual void SetDocumentCharacterSet(const nsACString& aCharSetID) = 0;
+
+  int32_t GetDocumentCharacterSetSource() const
+  {
+    return mCharacterSetSource;
+  }
+
+  // This method MUST be called before SetDocumentCharacterSet if
+  // you're planning to call both.
+  void SetDocumentCharacterSetSource(int32_t aCharsetSource)
+  {
+    mCharacterSetSource = aCharsetSource;
+  }
+
+  /**
+   * Add an observer that gets notified whenever the charset changes.
+   */
+  virtual nsresult AddCharSetObserver(nsIObserver* aObserver) = 0;
+
+  /**
+   * Remove a charset observer.
+   */
+  virtual void RemoveCharSetObserver(nsIObserver* aObserver) = 0;
+
+  /**
+   * This gets fired when the element that an id refers to changes.
+   * This fires at difficult times. It is generally not safe to do anything
+   * which could modify the DOM in any way. Use
+   * nsContentUtils::AddScriptRunner.
+   * @return true to keep the callback in the callback set, false
+   * to remove it.
+   */
+  typedef bool (* IDTargetObserver)(Element* aOldElement,
+                                      Element* aNewelement, void* aData);
+
+  /**
+   * Add an IDTargetObserver for a specific ID. The IDTargetObserver
+   * will be fired whenever the content associated with the ID changes
+   * in the future. If aForImage is true, mozSetImageElement can override
+   * what content is associated with the ID. In that case the IDTargetObserver
+   * will be notified at those times when the result of LookupImageElement
+   * changes.
+   * At most one (aObserver, aData, aForImage) triple can be
+   * registered for each ID.
+   * @return the content currently associated with the ID.
+   */
+  virtual Element* AddIDTargetObserver(nsIAtom* aID, IDTargetObserver aObserver,
+                                       void* aData, bool aForImage) = 0;
+  /**
+   * Remove the (aObserver, aData, aForImage) triple for a specific ID, if
+   * registered.
+   */
+  virtual void RemoveIDTargetObserver(nsIAtom* aID, IDTargetObserver aObserver,
+                                      void* aData, bool aForImage) = 0;
+
+  /**
+   * Get the Content-Type of this document.
+   * (This will always return NS_OK, but has this signature to be compatible
+   *  with nsIDOMDocument::GetContentType())
+   */
+  NS_IMETHOD GetContentType(nsAString& aContentType) = 0;
+
+  /**
+   * Set the Content-Type of this document.
+   */
+  virtual void SetContentType(const nsAString& aContentType) = 0;
+
+  /**
+   * Return the language of this document.
+   */
+  void GetContentLanguage(nsAString& aContentLanguage) const
+  {
+    CopyASCIItoUTF16(mContentLanguage, aContentLanguage);
+  }
+
+  // The states BidiEnabled and MathMLEnabled should persist across multiple views
+  // (screen, print) of the same document.
+
+  /**
+   * Check if the document contains bidi data.
+   * If so, we have to apply the Unicode Bidi Algorithm.
+   */
+  bool GetBidiEnabled() const
+  {
+    return mBidiEnabled;
+  }
+
+  /**
+   * Indicate the document contains bidi data.
+   * Currently, we cannot disable bidi, because once bidi is enabled,
+   * it affects a frame model irreversibly, and plays even though
+   * the document no longer contains bidi data.
+   */
+  void SetBidiEnabled()
+  {
+    mBidiEnabled = true;
+  }
+
+  /**
+   * Check if the document contains (or has contained) any MathML elements.
+   */
+  bool GetMathMLEnabled() const
+  {
+    return mMathMLEnabled;
+  }
+
+  void SetMathMLEnabled()
+  {
+    mMathMLEnabled = true;
+  }
+
+  /**
+   * Ask this document whether it's the initial document in its window.
+   */
+  bool IsInitialDocument() const
+  {
+    return mIsInitialDocumentInWindow;
+  }
+
+  /**
+   * Tell this document that it's the initial document in its window.  See
+   * comments on mIsInitialDocumentInWindow for when this should be called.
+   */
+  void SetIsInitialDocument(bool aIsInitialDocument)
+  {
+    mIsInitialDocumentInWindow = aIsInitialDocument;
+  }
+
+
+  /**
+   * Get the bidi options for this document.
+   * @see nsBidiUtils.h
+   */
+  uint32_t GetBidiOptions() const
+  {
+    return mBidiOptions;
+  }
+
+  /**
+   * Set the bidi options for this document.  This just sets the bits;
+   * callers are expected to take action as needed if they want this
+   * change to actually change anything immediately.
+   * @see nsBidiUtils.h
+   */
+  void SetBidiOptions(uint32_t aBidiOptions)
+  {
+    mBidiOptions = aBidiOptions;
+  }
+
+  /**
+   * Get the has mixed active content loaded flag for this document.
+   */
+  bool GetHasMixedActiveContentLoaded()
+  {
+    return mHasMixedActiveContentLoaded;
+  }
+
+  /**
+   * Set the has mixed active content loaded flag for this document.
+   */
+  void SetHasMixedActiveContentLoaded(bool aHasMixedActiveContentLoaded)
+  {
+    mHasMixedActiveContentLoaded = aHasMixedActiveContentLoaded;
+  }
+
+  /**
+   * Get mixed active content blocked flag for this document.
+   */
+  bool GetHasMixedActiveContentBlocked()
+  {
+    return mHasMixedActiveContentBlocked;
+  }
+
+  /**
+   * Set the mixed active content blocked flag for this document.
+   */
+  void SetHasMixedActiveContentBlocked(bool aHasMixedActiveContentBlocked)
+  {
+    mHasMixedActiveContentBlocked = aHasMixedActiveContentBlocked;
+  }
+
+  /**
+   * Get the has mixed display content loaded flag for this document.
+   */
+  bool GetHasMixedDisplayContentLoaded()
+  {
+    return mHasMixedDisplayContentLoaded;
+  }
+
+  /**
+   * Set the has mixed display content loaded flag for this document.
+   */
+  void SetHasMixedDisplayContentLoaded(bool aHasMixedDisplayContentLoaded)
+  {
+    mHasMixedDisplayContentLoaded = aHasMixedDisplayContentLoaded;
+  }
+
+  /**
+   * Get mixed display content blocked flag for this document.
+   */
+  bool GetHasMixedDisplayContentBlocked()
+  {
+    return mHasMixedDisplayContentBlocked;
+  }
+
+  /**
+   * Set the mixed display content blocked flag for this document.
+   */
+  void SetHasMixedDisplayContentBlocked(bool aHasMixedDisplayContentBlocked)
+  {
+    mHasMixedDisplayContentBlocked = aHasMixedDisplayContentBlocked;
+  }
+
+  /**
+   * Set the mixed content object subrequest flag for this document.
+   */
+  void SetHasMixedContentObjectSubrequest(bool aHasMixedContentObjectSubrequest)
+  {
+    mHasMixedContentObjectSubrequest = aHasMixedContentObjectSubrequest;
+  }
+
+  /**
+   * Set CSP flag for this document.
+   */
+  void SetHasCSP(bool aHasCSP)
+  {
+    mHasCSP = aHasCSP;
+  }
+
+  /**
+   * Set unsafe-inline CSP flag for this document.
+   */
+  void SetHasUnsafeInlineCSP(bool aHasUnsafeInlineCSP)
+  {
+    mHasUnsafeInlineCSP = aHasUnsafeInlineCSP;
+  }
+
+  /**
+   * Set unsafe-eval CSP flag for this document.
+   */
+  void SetHasUnsafeEvalCSP(bool aHasUnsafeEvalCSP)
+  {
+    mHasUnsafeEvalCSP = aHasUnsafeEvalCSP;
+  }
+
+  /**
+   * Get tracking content blocked flag for this document.
+   */
+  bool GetHasTrackingContentBlocked()
+  {
+    return mHasTrackingContentBlocked;
+  }
+
+  /**
+   * Set the tracking content blocked flag for this document.
+   */
+  void SetHasTrackingContentBlocked(bool aHasTrackingContentBlocked)
+  {
+    mHasTrackingContentBlocked = aHasTrackingContentBlocked;
+  }
+
+  /**
+   * Get tracking content loaded flag for this document.
+   */
+  bool GetHasTrackingContentLoaded()
+  {
+    return mHasTrackingContentLoaded;
+  }
+
+  /**
+   * Set the tracking content loaded flag for this document.
+   */
+  void SetHasTrackingContentLoaded(bool aHasTrackingContentLoaded)
+  {
+    mHasTrackingContentLoaded = aHasTrackingContentLoaded;
+  }
+
+  /**
+   * Get the sandbox flags for this document.
+   * @see nsSandboxFlags.h for the possible flags
+   */
+  uint32_t GetSandboxFlags() const
+  {
+    return mSandboxFlags;
+  }
+
+  /**
+   * Get string representation of sandbox flags (null if no flags are set)
+   */
+  void GetSandboxFlagsAsString(nsAString& aFlags);
+
+  /**
+   * Set the sandbox flags for this document.
+   * @see nsSandboxFlags.h for the possible flags
+   */
+  void SetSandboxFlags(uint32_t sandboxFlags)
+  {
+    mSandboxFlags = sandboxFlags;
+  }
+
+  /**
+   * Access HTTP header data (this may also get set from other
+   * sources, like HTML META tags).
+   */
+  virtual void GetHeaderData(nsIAtom* aHeaderField, nsAString& aData) const = 0;
+  virtual void SetHeaderData(nsIAtom* aheaderField, const nsAString& aData) = 0;
+
+  /**
+   * Create a new presentation shell that will use aContext for its
+   * presentation context (presentation contexts <b>must not</b> be
+   * shared among multiple presentation shells). The caller of this
+   * method is responsible for calling BeginObservingDocument() on the
+   * presshell if the presshell should observe document mutations.
+   */
+  virtual already_AddRefed<nsIPresShell> CreateShell(
+      nsPresContext* aContext,
+      nsViewManager* aViewManager,
+      mozilla::StyleSetHandle aStyleSet) = 0;
+  virtual void DeleteShell() = 0;
+
+  nsIPresShell* GetShell() const
+  {
+    return GetBFCacheEntry() ? nullptr : mPresShell;
+  }
+
+  // Instead using this method, what you probably want is
+  // RemoveFromBFCacheSync() as we do in MessagePort and BroadcastChannel.
+  void DisallowBFCaching()
+  {
+    NS_ASSERTION(!mBFCacheEntry, "We're already in the bfcache!");
+    mBFCacheDisallowed = true;
+  }
+
+  bool IsBFCachingAllowed() const
+  {
+    return !mBFCacheDisallowed;
+  }
+
+  void SetBFCacheEntry(nsIBFCacheEntry* aEntry)
+  {
+    NS_ASSERTION(IsBFCachingAllowed() || !aEntry,
+                 "You should have checked!");
+
+    mBFCacheEntry = aEntry;
+  }
+
+  nsIBFCacheEntry* GetBFCacheEntry() const
+  {
+    return mBFCacheEntry;
+  }
+
+  /**
+   * Return the parent document of this document. Will return null
+   * unless this document is within a compound document and has a
+   * parent. Note that this parent chain may cross chrome boundaries.
+   */
+  nsIDocument *GetParentDocument() const
+  {
+    return mParentDocument;
+  }
+
+  /**
+   * Set the parent document of this document.
+   */
+  void SetParentDocument(nsIDocument* aParent)
+  {
+    mParentDocument = aParent;
+  }
+
+  /**
+   * Are plugins allowed in this document ?
+   */
+  virtual nsresult GetAllowPlugins (bool* aAllowPlugins) = 0;
+
+  /**
+   * Set the sub document for aContent to aSubDoc.
+   */
+  virtual nsresult SetSubDocumentFor(Element* aContent,
+                                     nsIDocument* aSubDoc) = 0;
+
+  /**
+   * Get the sub document for aContent
+   */
+  virtual nsIDocument *GetSubDocumentFor(nsIContent *aContent) const = 0;
+
+  /**
+   * Find the content node for which aDocument is a sub document.
+   */
+  virtual Element* FindContentForSubDocument(nsIDocument* aDocument) const = 0;
+
+  /**
+   * Return the doctype for this document.
+   */
+  mozilla::dom::DocumentType* GetDoctype() const;
+
+  /**
+   * Return the root element for this document.
+   */
+  Element* GetRootElement() const;
+
+  /**
+   * Retrieve information about the viewport as a data structure.
+   * This will return information in the viewport META data section
+   * of the document. This can be used in lieu of ProcessViewportInfo(),
+   * which places the viewport information in the document header instead
+   * of returning it directly.
+   *
+   * @param aDisplaySize size of the on-screen display area for this
+   * document, in device pixels.
+   *
+   * NOTE: If the site is optimized for mobile (via the doctype), this
+   * will return viewport information that specifies default information.
+   */
+  virtual nsViewportInfo GetViewportInfo(const mozilla::ScreenIntSize& aDisplaySize) = 0;
+
+  /**
+   * True iff this doc will ignore manual character encoding overrides.
+   */
+  virtual bool WillIgnoreCharsetOverride() {
+    return true;
+  }
+
+  /**
+   * Return whether the document was created by a srcdoc iframe.
+   */
+  bool IsSrcdocDocument() const {
+    return mIsSrcdocDocument;
+  }
+
+  /**
+   * Sets whether the document was created by a srcdoc iframe.
+   */
+  void SetIsSrcdocDocument(bool aIsSrcdocDocument) {
+    mIsSrcdocDocument = aIsSrcdocDocument;
+  }
+
+  /*
+   * Gets the srcdoc string from within the channel (assuming both exist).
+   * Returns a void string if this isn't a srcdoc document or if
+   * the channel has not been set.
+   */
+  nsresult GetSrcdocData(nsAString& aSrcdocData);
+
+  bool DidDocumentOpen() {
+    return mDidDocumentOpen;
+  }
+
+  already_AddRefed<mozilla::dom::AnonymousContent>
+  InsertAnonymousContent(mozilla::dom::Element& aElement,
+                         mozilla::ErrorResult& aError);
+  void RemoveAnonymousContent(mozilla::dom::AnonymousContent& aContent,
+                              mozilla::ErrorResult& aError);
+  /**
+   * If aNode is a descendant of anonymous content inserted by
+   * InsertAnonymousContent, this method returns the root element of the
+   * inserted anonymous content (in other words, the clone of the aElement
+   * that was passed to InsertAnonymousContent).
+   */
+  Element* GetAnonRootIfInAnonymousContentContainer(nsINode* aNode) const;
+  nsTArray<RefPtr<mozilla::dom::AnonymousContent>>& GetAnonymousContents() {
+    return mAnonymousContents;
+  }
+
+  static nsresult GenerateDocumentId(nsAString& aId);
+  nsresult GetOrCreateId(nsAString& aId);
+  void SetId(const nsAString& aId);
+
+  mozilla::TimeStamp GetPageUnloadingEventTimeStamp() const
+  {
+    if (!mParentDocument) {
+      return mPageUnloadingEventTimeStamp;
+    }
+
+    mozilla::TimeStamp parentTimeStamp(mParentDocument->GetPageUnloadingEventTimeStamp());
+    if (parentTimeStamp.IsNull()) {
+      return mPageUnloadingEventTimeStamp;
+    }
+
+    if (!mPageUnloadingEventTimeStamp ||
+        parentTimeStamp < mPageUnloadingEventTimeStamp) {
+      return parentTimeStamp;
+    }
+
+    return mPageUnloadingEventTimeStamp;
+  }
+
+  virtual void NotifyLayerManagerRecreated() = 0;
+
+protected:
+  virtual Element *GetRootElementInternal() const = 0;
+
+  void SetPageUnloadingEventTimeStamp()
+  {
+    MOZ_ASSERT(!mPageUnloadingEventTimeStamp);
+    mPageUnloadingEventTimeStamp = mozilla::TimeStamp::NowLoRes();
+  }
+
+  void CleanUnloadEventsTimeStamp()
+  {
+    MOZ_ASSERT(mPageUnloadingEventTimeStamp);
+    mPageUnloadingEventTimeStamp = mozilla::TimeStamp();
+  }
+
+private:
+  class SelectorCacheKey
+  {
+    public:
+      explicit SelectorCacheKey(const nsAString& aString) : mKey(aString)
+      {
+        MOZ_COUNT_CTOR(SelectorCacheKey);
+      }
+
+      nsString mKey;
+      nsExpirationState mState;
+
+      nsExpirationState* GetExpirationState() { return &mState; }
+
+      ~SelectorCacheKey()
+      {
+        MOZ_COUNT_DTOR(SelectorCacheKey);
+      }
+  };
+
+  class SelectorCacheKeyDeleter;
+
+public:
+  class SelectorCache final
+    : public nsExpirationTracker<SelectorCacheKey, 4>
+  {
+    public:
+      SelectorCache();
+
+      // CacheList takes ownership of aSelectorList.
+      void CacheList(const nsAString& aSelector, nsCSSSelectorList* aSelectorList);
+
+      virtual void NotifyExpired(SelectorCacheKey* aSelector) override;
+
+      // We do not call MarkUsed because it would just slow down lookups and
+      // because we're OK expiring things after a few seconds even if they're
+      // being used.  Returns whether we actually had an entry for aSelector.
+      // If we have an entry and *aList is null, that indicates that aSelector
+      // has already been parsed and is not a syntactically valid selector.
+      bool GetList(const nsAString& aSelector, nsCSSSelectorList** aList)
+      {
+        return mTable.Get(aSelector, aList);
+      }
+
+      ~SelectorCache()
+      {
+        AgeAllGenerations();
+      }
+
+    private:
+      nsClassHashtable<nsStringHashKey, nsCSSSelectorList> mTable;
+  };
+
+  SelectorCache& GetSelectorCache()
+  {
+    return mSelectorCache;
+  }
+  // Get the root <html> element, or return null if there isn't one (e.g.
+  // if the root isn't <html>)
+  Element* GetHtmlElement() const;
+  // Returns the first child of GetHtmlContent which has the given tag,
+  // or nullptr if that doesn't exist.
+  Element* GetHtmlChildElement(nsIAtom* aTag);
+  // Get the canonical <body> element, or return null if there isn't one (e.g.
+  // if the root isn't <html> or if the <body> isn't there)
+  mozilla::dom::HTMLBodyElement* GetBodyElement();
+  // Get the canonical <head> element, or return null if there isn't one (e.g.
+  // if the root isn't <html> or if the <head> isn't there)
+  Element* GetHeadElement() {
+    return GetHtmlChildElement(nsGkAtoms::head);
+  }
+
+  /**
+   * Accessors to the collection of stylesheets owned by this document.
+   * Style sheets are ordered, most significant last.
+   */
+
+  /**
+   * These exists to allow us to on-demand load user-agent style sheets that
+   * would otherwise be loaded by nsDocumentViewer::CreateStyleSet. This allows
+   * us to keep the memory used by a document's rule cascade data (the stuff in
+   * its nsStyleSet's nsCSSRuleProcessors) - which can be considerable - lower
+   * than it would be if we loaded all built-in user-agent style sheets up
+   * front.
+   *
+   * By "built-in" user-agent style sheets we mean the user-agent style sheets
+   * that gecko itself supplies (such as html.css and svg.css) as opposed to
+   * user-agent level style sheets inserted by add-ons or the like.
+   *
+   * This function prepends the given style sheet to the document's style set
+   * in order to make sure that it does not override user-agent style sheets
+   * supplied by add-ons or by the app (Firefox OS or Firefox Mobile, for
+   * example), since their sheets should override built-in sheets.
+   *
+   * TODO We can get rid of the whole concept of delayed loading if we fix
+   * bug 77999.
+   */
+  virtual void EnsureOnDemandBuiltInUASheet(mozilla::StyleSheet* aSheet) = 0;
+
+  /**
+   * Get the number of (document) stylesheets
+   *
+   * @return the number of stylesheets
+   * @throws no exceptions
+   */
+  virtual int32_t GetNumberOfStyleSheets() const = 0;
+
+  /**
+   * Get a particular stylesheet
+   * @param aIndex the index the stylesheet lives at.  This is zero-based
+   * @return the stylesheet at aIndex.  Null if aIndex is out of range.
+   * @throws no exceptions
+   */
+  virtual mozilla::StyleSheet* GetStyleSheetAt(int32_t aIndex) const = 0;
+
+  /**
+   * Insert a sheet at a particular spot in the stylesheet list (zero-based)
+   * @param aSheet the sheet to insert
+   * @param aIndex the index to insert at.  This index will be
+   *   adjusted for the "special" sheets.
+   * @throws no exceptions
+   */
+  virtual void InsertStyleSheetAt(mozilla::StyleSheet* aSheet,
+                                  int32_t aIndex) = 0;
+
+  /**
+   * Get the index of a particular stylesheet.  This will _always_
+   * consider the "special" sheets as part of the sheet list.
+   * @param aSheet the sheet to get the index of
+   * @return aIndex the index of the sheet in the full list
+   */
+  virtual int32_t GetIndexOfStyleSheet(
+      const mozilla::StyleSheet* aSheet) const = 0;
+
+  /**
+   * Replace the stylesheets in aOldSheets with the stylesheets in
+   * aNewSheets. The two lists must have equal length, and the sheet
+   * at positon J in the first list will be replaced by the sheet at
+   * position J in the second list.  Some sheets in the second list
+   * may be null; if so the corresponding sheets in the first list
+   * will simply be removed.
+   */
+  virtual void UpdateStyleSheets(
+      nsTArray<RefPtr<mozilla::StyleSheet>>& aOldSheets,
+      nsTArray<RefPtr<mozilla::StyleSheet>>& aNewSheets) = 0;
+
+  /**
+   * Add a stylesheet to the document
+   */
+  virtual void AddStyleSheet(mozilla::StyleSheet* aSheet) = 0;
+
+  /**
+   * Remove a stylesheet from the document
+   */
+  virtual void RemoveStyleSheet(mozilla::StyleSheet* aSheet) = 0;
+
+  /**
+   * Notify the document that the applicable state of the sheet changed
+   * and that observers should be notified and style sets updated
+   */
+  virtual void SetStyleSheetApplicableState(mozilla::StyleSheet* aSheet,
+                                            bool aApplicable) = 0;
+
+  enum additionalSheetType {
+    eAgentSheet,
+    eUserSheet,
+    eAuthorSheet,
+    AdditionalSheetTypeCount
+  };
+
+  virtual nsresult LoadAdditionalStyleSheet(additionalSheetType aType,
+                                            nsIURI* aSheetURI) = 0;
+  virtual nsresult AddAdditionalStyleSheet(additionalSheetType aType,
+                                           mozilla::StyleSheet* aSheet) = 0;
+  virtual void RemoveAdditionalStyleSheet(additionalSheetType aType,
+                                          nsIURI* sheetURI) = 0;
+  virtual mozilla::StyleSheet* GetFirstAdditionalAuthorSheet() = 0;
+
+  /**
+   * Assuming that aDocSheets is an array of document-level style
+   * sheets for this document, returns the index that aSheet should
+   * be inserted at to maintain document ordering.
+   *
+   * Defined in nsIDocumentInlines.h.
+   */
+  template<typename T>
+  size_t FindDocStyleSheetInsertionPoint(const nsTArray<RefPtr<T>>& aDocSheets,
+                                         T* aSheet);
+
+  /**
+   * Get this document's CSSLoader.  This is guaranteed to not return null.
+   */
+  mozilla::css::Loader* CSSLoader() const {
+    return mCSSLoader;
+  }
+
+  mozilla::StyleBackendType GetStyleBackendType() const {
+    if (mStyleBackendType == mozilla::StyleBackendType(0)) {
+      const_cast<nsIDocument*>(this)->UpdateStyleBackendType();
+    }
+    MOZ_ASSERT(mStyleBackendType != mozilla::StyleBackendType(0));
+    return mStyleBackendType;
+  }
+
+  void UpdateStyleBackendType();
+
+  bool IsStyledByServo() const {
+    return GetStyleBackendType() == mozilla::StyleBackendType::Servo;
+  }
+
+  /**
+   * Get this document's StyleImageLoader.  This is guaranteed to not return null.
+   */
+  mozilla::css::ImageLoader* StyleImageLoader() const {
+    return mStyleImageLoader;
+  }
+
+  /**
+   * Get the channel that was passed to StartDocumentLoad or Reset for this
+   * document.  Note that this may be null in some cases (eg if
+   * StartDocumentLoad or Reset were never called)
+   */
+  virtual nsIChannel* GetChannel() const = 0;
+
+  /**
+   * Get this document's attribute stylesheet.  May return null if
+   * there isn't one.
+   */
+  nsHTMLStyleSheet* GetAttributeStyleSheet() const {
+    return mAttrStyleSheet;
+  }
+
+  /**
+   * Get this document's inline style sheet.  May return null if there
+   * isn't one
+   */
+  nsHTMLCSSStyleSheet* GetInlineStyleSheet() const {
+    return mStyleAttrStyleSheet;
+  }
+
+  /**
+   * Get this document's SVG Animation rule processor.  May return null
+   * if there isn't one.
+   */
+  mozilla::SVGAttrAnimationRuleProcessor*
+  GetSVGAttrAnimationRuleProcessor() const
+  {
+    return mSVGAttrAnimationRuleProcessor;
+  }
+
+  virtual void SetScriptGlobalObject(nsIScriptGlobalObject* aGlobalObject) = 0;
+
+  /**
+   * Get/set the object from which the context for the event/script handling can
+   * be got. Normally GetScriptHandlingObject() returns the same object as
+   * GetScriptGlobalObject(), but if the document is loaded as data,
+   * non-null may be returned, even if GetScriptGlobalObject() returns null.
+   * aHasHadScriptHandlingObject is set true if document has had the object
+   * for event/script handling. Do not process any events/script if the method
+   * returns null, but aHasHadScriptHandlingObject is true.
+   */
+  nsIScriptGlobalObject*
+    GetScriptHandlingObject(bool& aHasHadScriptHandlingObject) const
+  {
+    aHasHadScriptHandlingObject = mHasHadScriptHandlingObject;
+    return mScriptGlobalObject ? mScriptGlobalObject.get() :
+                                 GetScriptHandlingObjectInternal();
+  }
+  virtual void SetScriptHandlingObject(nsIScriptGlobalObject* aScriptObject) = 0;
+
+  /**
+   * Get the object that is used as the scope for all of the content
+   * wrappers whose owner document is this document. Unlike the script global
+   * object, this will only return null when the global object for this
+   * document is truly gone. Use this object when you're trying to find a
+   * content wrapper in XPConnect.
+   */
+  virtual nsIGlobalObject* GetScopeObject() const = 0;
+  virtual void SetScopeObject(nsIGlobalObject* aGlobal) = 0;
+
+  /**
+   * Return the window containing the document (the outer window).
+   */
+  nsPIDOMWindowOuter *GetWindow() const
+  {
+    return mWindow ? mWindow->GetOuterWindow() : GetWindowInternal();
+  }
+
+  bool IsInBackgroundWindow() const
+  {
+    auto* outer = mWindow ? mWindow->GetOuterWindow() : nullptr;
+    return outer && outer->IsBackground();
+  }
+
+  /**
+   * Return the inner window used as the script compilation scope for
+   * this document. If you're not absolutely sure you need this, use
+   * GetWindow().
+   */
+  nsPIDOMWindowInner* GetInnerWindow() const
+  {
+    return mRemovedFromDocShell ? nullptr : mWindow;
+  }
+
+  /**
+   * Return the outer window ID.
+   */
+  uint64_t OuterWindowID() const
+  {
+    nsPIDOMWindowOuter* window = GetWindow();
+    return window ? window->WindowID() : 0;
+  }
+
+  /**
+   * Return the inner window ID.
+   */
+  uint64_t InnerWindowID() const
+  {
+    nsPIDOMWindowInner* window = GetInnerWindow();
+    return window ? window->WindowID() : 0;
+  }
+
+  /**
+   * Get the script loader for this document
+   */
+  virtual nsScriptLoader* ScriptLoader() = 0;
+
+  /**
+   * Add/Remove an element to the document's id and name hashes
+   */
+  virtual void AddToIdTable(Element* aElement, nsIAtom* aId) = 0;
+  virtual void RemoveFromIdTable(Element* aElement, nsIAtom* aId) = 0;
+  virtual void AddToNameTable(Element* aElement, nsIAtom* aName) = 0;
+  virtual void RemoveFromNameTable(Element* aElement, nsIAtom* aName) = 0;
+
+  /**
+   * Returns all elements in the fullscreen stack in the insertion order.
+   */
+  virtual nsTArray<Element*> GetFullscreenStack() const = 0;
+
+  /**
+   * Asynchronously requests that the document make aElement the fullscreen
+   * element, and move into fullscreen mode. The current fullscreen element
+   * (if any) is pushed onto the fullscreen element stack, and it can be
+   * returned to fullscreen status by calling RestorePreviousFullScreenState().
+   *
+   * Note that requesting fullscreen in a document also makes the element which
+   * contains this document in this document's parent document fullscreen. i.e.
+   * the <iframe> or <browser> that contains this document is also mode
+   * fullscreen. This happens recursively in all ancestor documents.
+   */
+  virtual void AsyncRequestFullScreen(
+    mozilla::UniquePtr<FullscreenRequest>&& aRequest) = 0;
+
+  /**
+   * Called when a frame in a child process has entered fullscreen or when a
+   * fullscreen frame in a child process changes to another origin.
+   * aFrameElement is the frame element which contains the child-process
+   * fullscreen document.
+   */
+  virtual nsresult
+    RemoteFrameFullscreenChanged(nsIDOMElement* aFrameElement) = 0;
+
+  /**
+   * Called when a frame in a remote child document has rolled back fullscreen
+   * so that all its fullscreen element stacks are empty; we must continue the
+   * rollback in this parent process' doc tree branch which is fullscreen.
+   * Note that only one branch of the document tree can have its documents in
+   * fullscreen state at one time. We're in inconsistent state if a
+   * fullscreen document has a parent and that parent isn't fullscreen. We
+   * preserve this property across process boundaries.
+   */
+   virtual nsresult RemoteFrameFullscreenReverted() = 0;
+
+  /**
+   * Restores the previous full-screen element to full-screen status. If there
+   * is no former full-screen element, this exits full-screen, moving the
+   * top-level browser window out of full-screen mode.
+   */
+  virtual void RestorePreviousFullScreenState() = 0;
+
+  /**
+   * Returns true if this document is a fullscreen leaf document, i.e. it
+   * is in fullscreen mode and has no fullscreen children.
+   */
+  virtual bool IsFullscreenLeaf() = 0;
+
+  /**
+   * Returns the document which is at the root of this document's branch
+   * in the in-process document tree. Returns nullptr if the document isn't
+   * fullscreen.
+   */
+  virtual nsIDocument* GetFullscreenRoot() = 0;
+
+  /**
+   * Sets the fullscreen root to aRoot. This stores a weak reference to aRoot
+   * in this document.
+   */
+  virtual void SetFullscreenRoot(nsIDocument* aRoot) = 0;
+
+  /**
+   * Synchronously cleans up the fullscreen state on the given document.
+   *
+   * Calling this without performing fullscreen transition could lead
+   * to undesired effect (the transition happens after document state
+   * flips), hence it should only be called either by nsGlobalWindow
+   * when we have performed the transition, or when it is necessary to
+   * clean up the state immediately. Otherwise, AsyncExitFullscreen()
+   * should be called instead.
+   *
+   * aDocument must not be null.
+   */
+  static void ExitFullscreenInDocTree(nsIDocument* aDocument);
+
+  /**
+   * Ask the document to exit fullscreen state asynchronously.
+   *
+   * Different from ExitFullscreenInDocTree(), this allows the window
+   * to perform fullscreen transition first if any.
+   *
+   * If aDocument is null, it will exit fullscreen from all documents
+   * in all windows.
+   */
+  static void AsyncExitFullscreen(nsIDocument* aDocument);
+
+  /**
+   * Handles any pending fullscreen in aDocument or its subdocuments.
+   *
+   * Returns whether there is any fullscreen request handled.
+   */
+  static bool HandlePendingFullscreenRequests(nsIDocument* aDocument);
+
+  /**
+   * Dispatch fullscreenerror event and report the failure message to
+   * the console.
+   */
+  void DispatchFullscreenError(const char* aMessage);
+
+  virtual void RequestPointerLock(Element* aElement) = 0;
+
+  static void UnlockPointer(nsIDocument* aDoc = nullptr);
+
+  // ScreenOrientation related APIs
+
+  virtual void SetCurrentOrientation(mozilla::dom::OrientationType aType,
+                                     uint16_t aAngle) = 0;
+  virtual uint16_t CurrentOrientationAngle() const = 0;
+  virtual mozilla::dom::OrientationType CurrentOrientationType() const = 0;
+  virtual void SetOrientationPendingPromise(mozilla::dom::Promise* aPromise) = 0;
+  virtual mozilla::dom::Promise* GetOrientationPendingPromise() const = 0;
+
+  //----------------------------------------------------------------------
+
+  // Document notification API's
+
+  /**
+   * Add a new observer of document change notifications. Whenever
+   * content is changed, appended, inserted or removed the observers are
+   * informed.  An observer that is already observing the document must
+   * not be added without being removed first.
+   */
+  virtual void AddObserver(nsIDocumentObserver* aObserver) = 0;
+
+  /**
+   * Remove an observer of document change notifications. This will
+   * return false if the observer cannot be found.
+   */
+  virtual bool RemoveObserver(nsIDocumentObserver* aObserver) = 0;
+
+  // Observation hooks used to propagate notifications to document observers.
+  // BeginUpdate must be called before any batch of modifications of the
+  // content model or of style data, EndUpdate must be called afterward.
+  // To make this easy and painless, use the mozAutoDocUpdate helper class.
+  virtual void BeginUpdate(nsUpdateType aUpdateType) = 0;
+  virtual void EndUpdate(nsUpdateType aUpdateType) = 0;
+  virtual void BeginLoad() = 0;
+  virtual void EndLoad() = 0;
+
+  enum ReadyState { READYSTATE_UNINITIALIZED = 0, READYSTATE_LOADING = 1, READYSTATE_INTERACTIVE = 3, READYSTATE_COMPLETE = 4};
+  virtual void SetReadyStateInternal(ReadyState rs) = 0;
+  ReadyState GetReadyStateEnum()
+  {
+    return mReadyState;
+  }
+
+  // notify that a content node changed state.  This must happen under
+  // a scriptblocker but NOT within a begin/end update.
+  virtual void ContentStateChanged(nsIContent* aContent,
+                                   mozilla::EventStates aStateMask) = 0;
+
+  // Notify that a document state has changed.
+  // This should only be called by callers whose state is also reflected in the
+  // implementation of nsDocument::GetDocumentState.
+  virtual void DocumentStatesChanged(mozilla::EventStates aStateMask) = 0;
+
+  // Observation hooks for style data to propagate notifications
+  // to document observers
+  virtual void StyleRuleChanged(mozilla::StyleSheet* aStyleSheet,
+                                mozilla::css::Rule* aStyleRule) = 0;
+  virtual void StyleRuleAdded(mozilla::StyleSheet* aStyleSheet,
+                              mozilla::css::Rule* aStyleRule) = 0;
+  virtual void StyleRuleRemoved(mozilla::StyleSheet* aStyleSheet,
+                                mozilla::css::Rule* aStyleRule) = 0;
+
+  /**
+   * Flush notifications for this document and its parent documents
+   * (since those may affect the layout of this one).
+   */
+  virtual void FlushPendingNotifications(mozFlushType aType) = 0;
+
+  /**
+   * Calls FlushPendingNotifications on any external resources this document
+   * has. If this document has no external resources or is an external resource
+   * itself this does nothing. This should only be called with
+   * aType >= Flush_Style.
+   */
+  virtual void FlushExternalResources(mozFlushType aType) = 0;
+
+  nsBindingManager* BindingManager() const
+  {
+    return mNodeInfoManager->GetBindingManager();
+  }
+
+  /**
+   * Only to be used inside Gecko, you can't really do anything with the
+   * pointer outside Gecko anyway.
+   */
+  nsNodeInfoManager* NodeInfoManager() const
+  {
+    return mNodeInfoManager;
+  }
+
+  /**
+   * Reset the document using the given channel and loadgroup.  This works
+   * like ResetToURI, but also sets the document's channel to aChannel.
+   * The principal of the document will be set from the channel.
+   */
+  virtual void Reset(nsIChannel* aChannel, nsILoadGroup* aLoadGroup) = 0;
+
+  /**
+   * Reset this document to aURI, aLoadGroup, and aPrincipal.  aURI must not be
+   * null.  If aPrincipal is null, a codebase principal based on aURI will be
+   * used.
+   */
+  virtual void ResetToURI(nsIURI *aURI, nsILoadGroup* aLoadGroup,
+                          nsIPrincipal* aPrincipal) = 0;
+
+  /**
+   * Set the container (docshell) for this document. Virtual so that
+   * docshell can call it.
+   */
+  virtual void SetContainer(nsDocShell* aContainer);
+
+  /**
+   * Get the container (docshell) for this document.
+   */
+  virtual nsISupports* GetContainer() const;
+
+  /**
+   * Get the container's load context for this document.
+   */
+  nsILoadContext* GetLoadContext() const;
+
+  /**
+   * Get docshell the for this document.
+   */
+  nsIDocShell* GetDocShell() const;
+
+  /**
+   * Set and get XML declaration. If aVersion is null there is no declaration.
+   * aStandalone takes values -1, 0 and 1 indicating respectively that there
+   * was no standalone parameter in the declaration, that it was given as no,
+   * or that it was given as yes.
+   */
+  virtual void SetXMLDeclaration(const char16_t *aVersion,
+                                 const char16_t *aEncoding,
+                                 const int32_t aStandalone) = 0;
+  virtual void GetXMLDeclaration(nsAString& aVersion,
+                                 nsAString& aEncoding,
+                                 nsAString& Standalone) = 0;
+
+  /**
+   * Returns true if this is what HTML 5 calls an "HTML document" (for example
+   * regular HTML document with Content-Type "text/html", image documents and
+   * media documents).  Returns false for XHTML and any other documents parsed
+   * by the XML parser.
+   */
+  bool IsHTMLDocument() const
+  {
+    return mType == eHTML;
+  }
+  bool IsHTMLOrXHTML() const
+  {
+    return mType == eHTML || mType == eXHTML;
+  }
+  bool IsXMLDocument() const
+  {
+    return !IsHTMLDocument();
+  }
+  bool IsSVGDocument() const
+  {
+    return mType == eSVG;
+  }
+  bool IsXULDocument() const
+  {
+    return mType == eXUL;
+  }
+  bool IsUnstyledDocument()
+  {
+    return IsLoadedAsData() || IsLoadedAsInteractiveData();
+  }
+  bool LoadsFullXULStyleSheetUpFront()
+  {
+    return IsXULDocument() || AllowXULXBL();
+  }
+
+  virtual bool IsScriptEnabled() = 0;
+
+  /**
+   * Create an element with the specified name, prefix and namespace ID.
+   * Returns null if element name parsing failed.
+   */
+  virtual already_AddRefed<Element> CreateElem(const nsAString& aName,
+                                               nsIAtom* aPrefix,
+                                               int32_t aNamespaceID,
+                                               const nsAString* aIs = nullptr) = 0;
+
+  /**
+   * Get the security info (i.e. SSL state etc) that the document got
+   * from the channel/document that created the content of the
+   * document.
+   *
+   * @see nsIChannel
+   */
+  nsISupports *GetSecurityInfo()
+  {
+    return mSecurityInfo;
+  }
+
+  /**
+   * Get the channel that failed to load and resulted in an error page, if it
+   * exists. This is only relevant to error pages.
+   */
+  virtual nsIChannel* GetFailedChannel() const = 0;
+
+  /**
+   * Set the channel that failed to load and resulted in an error page.
+   * This is only relevant to error pages.
+   */
+  virtual void SetFailedChannel(nsIChannel* aChannel) = 0;
+
+  /**
+   * Returns the default namespace ID used for elements created in this
+   * document.
+   */
+  int32_t GetDefaultNamespaceID() const
+  {
+    return mDefaultElementType;
+  }
+
+  void DeleteAllProperties();
+  void DeleteAllPropertiesFor(nsINode* aNode);
+
+  nsPropertyTable* PropertyTable(uint16_t aCategory) {
+    if (aCategory == 0)
+      return &mPropertyTable;
+    return GetExtraPropertyTable(aCategory);
+  }
+  uint32_t GetPropertyTableCount()
+  { return mExtraPropertyTables.Length() + 1; }
+
+  /**
+   * Sets the ID used to identify this part of the multipart document
+   */
+  void SetPartID(uint32_t aID) {
+    mPartID = aID;
+  }
+
+  /**
+   * Return the ID used to identify this part of the multipart document
+   */
+  uint32_t GetPartID() const {
+    return mPartID;
+  }
+
+  /**
+   * Sanitize the document by resetting all input elements and forms that have
+   * autocomplete=off to their default values.
+   */
+  virtual void Sanitize() = 0;
+
+  /**
+   * Enumerate all subdocuments.
+   * The enumerator callback should return true to continue enumerating, or
+   * false to stop.  This will never get passed a null aDocument.
+   */
+  typedef bool (*nsSubDocEnumFunc)(nsIDocument *aDocument, void *aData);
+  virtual void EnumerateSubDocuments(nsSubDocEnumFunc aCallback,
+                                     void *aData) = 0;
+
+  /**
+   * Check whether it is safe to cache the presentation of this document
+   * and all of its subdocuments. This method checks the following conditions
+   * recursively:
+   *  - Some document types, such as plugin documents, cannot be safely cached.
+   *  - If there are any pending requests, we don't allow the presentation
+   *    to be cached.  Ideally these requests would be suspended and resumed,
+   *    but that is difficult in some cases, such as XMLHttpRequest.
+   *  - If there are any beforeunload or unload listeners, we must fire them
+   *    for correctness, but this likely puts the document into a state where
+   *    it would not function correctly if restored.
+   *
+   * |aNewRequest| should be the request for a new document which will
+   * replace this document in the docshell.  The new document's request
+   * will be ignored when checking for active requests.  If there is no
+   * request associated with the new document, this parameter may be null.
+   */
+  virtual bool CanSavePresentation(nsIRequest *aNewRequest) = 0;
+
+  /**
+   * Notify the document that its associated ContentViewer is being destroyed.
+   * This releases circular references so that the document can go away.
+   * Destroy() is only called on documents that have a content viewer.
+   */
+  virtual void Destroy() = 0;
+
+  /**
+   * Notify the document that its associated ContentViewer is no longer
+   * the current viewer for the docshell. The document might still
+   * be rendered in "zombie state" until the next document is ready.
+   * The document should save form control state.
+   */
+  virtual void RemovedFromDocShell() = 0;
+
+  /**
+   * Get the layout history state that should be used to save and restore state
+   * for nodes in this document.  This may return null; if that happens state
+   * saving and restoration is not possible.
+   */
+  virtual already_AddRefed<nsILayoutHistoryState> GetLayoutHistoryState() const = 0;
+
+  /**
+   * Methods that can be used to prevent onload firing while an event that
+   * should block onload is posted.  onload is guaranteed to not fire until
+   * either all calls to BlockOnload() have been matched by calls to
+   * UnblockOnload() or the load has been stopped altogether (by the user
+   * pressing the Stop button, say).
+   */
+  virtual void BlockOnload() = 0;
+  /**
+   * @param aFireSync whether to fire onload synchronously.  If false,
+   * onload will fire asynchronously after all onload blocks have been
+   * removed.  It will NOT fire from inside UnblockOnload.  If true,
+   * onload may fire from inside UnblockOnload.
+   */
+  virtual void UnblockOnload(bool aFireSync) = 0;
+
+  void BlockDOMContentLoaded()
+  {
+    ++mBlockDOMContentLoaded;
+  }
+
+  virtual void UnblockDOMContentLoaded() = 0;
+
+  /**
+   * Notification that the page has been shown, for documents which are loaded
+   * into a DOM window.  This corresponds to the completion of document load,
+   * or to the page's presentation being restored into an existing DOM window.
+   * This notification fires applicable DOM events to the content window.  See
+   * PageTransitionEvent.webidl for a description of the |aPersisted|
+   * parameter. If aDispatchStartTarget is null, the pageshow event is
+   * dispatched on the ScriptGlobalObject for this document, otherwise it's
+   * dispatched on aDispatchStartTarget.
+   * Note: if aDispatchStartTarget isn't null, the showing state of the
+   * document won't be altered.
+   */
+  virtual void OnPageShow(bool aPersisted,
+                          mozilla::dom::EventTarget* aDispatchStartTarget) = 0;
+
+  /**
+   * Notification that the page has been hidden, for documents which are loaded
+   * into a DOM window.  This corresponds to the unloading of the document, or
+   * to the document's presentation being saved but removed from an existing
+   * DOM window.  This notification fires applicable DOM events to the content
+   * window.  See PageTransitionEvent.webidl for a description of the
+   * |aPersisted| parameter. If aDispatchStartTarget is null, the pagehide
+   * event is dispatched on the ScriptGlobalObject for this document,
+   * otherwise it's dispatched on aDispatchStartTarget.
+   * Note: if aDispatchStartTarget isn't null, the showing state of the
+   * document won't be altered.
+   */
+  virtual void OnPageHide(bool aPersisted,
+                          mozilla::dom::EventTarget* aDispatchStartTarget) = 0;
+
+  /*
+   * We record the set of links in the document that are relevant to
+   * style.
+   */
+  /**
+   * Notification that an element is a link that is relevant to style.
+   */
+  virtual void AddStyleRelevantLink(mozilla::dom::Link* aLink) = 0;
+  /**
+   * Notification that an element is a link and its URI might have been
+   * changed or the element removed. If the element is still a link relevant
+   * to style, then someone must ensure that AddStyleRelevantLink is
+   * (eventually) called on it again.
+   */
+  virtual void ForgetLink(mozilla::dom::Link* aLink) = 0;
+
+  /**
+   * Resets and removes a box object from the document's box object cache
+   *
+   * @param aElement canonical nsIContent pointer of the box object's element
+   */
+  virtual void ClearBoxObjectFor(nsIContent *aContent) = 0;
+
+  /**
+   * Get the box object for an element. This is not exposed through a
+   * scriptable interface except for XUL documents.
+   */
+  virtual already_AddRefed<mozilla::dom::BoxObject>
+    GetBoxObjectFor(mozilla::dom::Element* aElement,
+                    mozilla::ErrorResult& aRv) = 0;
+
+  /**
+   * Support for window.matchMedia()
+   */
+
+  already_AddRefed<mozilla::dom::MediaQueryList>
+    MatchMedia(const nsAString& aMediaQueryList);
+
+  const PRCList* MediaQueryLists() const {
+    return &mDOMMediaQueryLists;
+  }
+
+  /**
+   * Get the compatibility mode for this document
+   */
+  nsCompatibility GetCompatibilityMode() const {
+    return mCompatMode;
+  }
+
+  /**
+   * Check whether we've ever fired a DOMTitleChanged event for this
+   * document.
+   */
+  bool HaveFiredDOMTitleChange() const {
+    return mHaveFiredTitleChange;
+  }
+
+  /**
+   * See GetAnonymousElementByAttribute on nsIDOMDocumentXBL.
+   */
+  virtual Element*
+    GetAnonymousElementByAttribute(nsIContent* aElement,
+                                   nsIAtom* aAttrName,
+                                   const nsAString& aAttrValue) const = 0;
+
+  /**
+   * Helper for nsIDOMDocument::elementFromPoint implementation that allows
+   * ignoring the scroll frame and/or avoiding layout flushes.
+   *
+   * @see nsIDOMWindowUtils::elementFromPoint
+   */
+  virtual Element* ElementFromPointHelper(float aX, float aY,
+                                          bool aIgnoreRootScrollFrame,
+                                          bool aFlushLayout) = 0;
+
+  enum ElementsFromPointFlags {
+    IGNORE_ROOT_SCROLL_FRAME = 1,
+    FLUSH_LAYOUT = 2,
+    IS_ELEMENT_FROM_POINT = 4
+  };
+
+  virtual void ElementsFromPointHelper(float aX, float aY,
+                                       uint32_t aFlags,
+                                       nsTArray<RefPtr<mozilla::dom::Element>>& aElements) = 0;
+
+  virtual nsresult NodesFromRectHelper(float aX, float aY,
+                                       float aTopSize, float aRightSize,
+                                       float aBottomSize, float aLeftSize,
+                                       bool aIgnoreRootScrollFrame,
+                                       bool aFlushLayout,
+                                       nsIDOMNodeList** aReturn) = 0;
+
+  /**
+   * See FlushSkinBindings on nsBindingManager
+   */
+  virtual void FlushSkinBindings() = 0;
+
+  /**
+   * To batch DOMSubtreeModified, document needs to be informed when
+   * a mutation event might be dispatched, even if the event isn't actually
+   * created because there are no listeners for it.
+   *
+   * @param aTarget is the target for the mutation event.
+   */
+  void MayDispatchMutationEvent(nsINode* aTarget)
+  {
+    if (mSubtreeModifiedDepth > 0) {
+      mSubtreeModifiedTargets.AppendObject(aTarget);
+    }
+  }
+
+  /**
+   * Marks as not-going-to-be-collected for the given generation of
+   * cycle collection.
+   */
+  void MarkUncollectableForCCGeneration(uint32_t aGeneration)
+  {
+    mMarkedCCGeneration = aGeneration;
+  }
+
+  /**
+   * Gets the cycle collector generation this document is marked for.
+   */
+  uint32_t GetMarkedCCGeneration()
+  {
+    return mMarkedCCGeneration;
+  }
+
+  bool IsLoadedAsData()
+  {
+    return mLoadedAsData;
+  }
+
+  bool IsLoadedAsInteractiveData()
+  {
+    return mLoadedAsInteractiveData;
+  }
+
+  bool MayStartLayout()
+  {
+    return mMayStartLayout;
+  }
+
+  void SetMayStartLayout(bool aMayStartLayout)
+  {
+    mMayStartLayout = aMayStartLayout;
+  }
+
+  already_AddRefed<nsIDocumentEncoder> GetCachedEncoder();
+
+  void SetCachedEncoder(already_AddRefed<nsIDocumentEncoder> aEncoder);
+
+  // In case of failure, the document really can't initialize the frame loader.
+  virtual nsresult InitializeFrameLoader(nsFrameLoader* aLoader) = 0;
+  // In case of failure, the caller must handle the error, for example by
+  // finalizing frame loader asynchronously.
+  virtual nsresult FinalizeFrameLoader(nsFrameLoader* aLoader, nsIRunnable* aFinalizer) = 0;
+  // Removes the frame loader of aShell from the initialization list.
+  virtual void TryCancelFrameLoaderInitialization(nsIDocShell* aShell) = 0;
+
+  /**
+   * Check whether this document is a root document that is not an
+   * external resource.
+   */
+  bool IsRootDisplayDocument() const
+  {
+    return !mParentDocument && !mDisplayDocument;
+  }
+
+  bool IsBeingUsedAsImage() const {
+    return mIsBeingUsedAsImage;
+  }
+
+  void SetIsBeingUsedAsImage() {
+    mIsBeingUsedAsImage = true;
+  }
+
+  bool IsResourceDoc() const {
+    return IsBeingUsedAsImage() || // Are we a helper-doc for an SVG image?
+      mHasDisplayDocument;         // Are we an external resource doc?
+  }
+
+  /**
+   * Get the document for which this document is an external resource.  This
+   * will be null if this document is not an external resource.  Otherwise,
+   * GetDisplayDocument() will return a non-null document, and
+   * GetDisplayDocument()->GetDisplayDocument() is guaranteed to be null.
+   */
+  nsIDocument* GetDisplayDocument() const
+  {
+    return mDisplayDocument;
+  }
+
+  /**
+   * Set the display document for this document.  aDisplayDocument must not be
+   * null.
+   */
+  void SetDisplayDocument(nsIDocument* aDisplayDocument)
+  {
+    MOZ_ASSERT(!GetShell() &&
+               !GetContainer() &&
+               !GetWindow(),
+               "Shouldn't set mDisplayDocument on documents that already "
+               "have a presentation or a docshell or a window");
+    MOZ_ASSERT(aDisplayDocument, "Must not be null");
+    MOZ_ASSERT(aDisplayDocument != this, "Should be different document");
+    MOZ_ASSERT(!aDisplayDocument->GetDisplayDocument(),
+               "Display documents should not nest");
+    mDisplayDocument = aDisplayDocument;
+    mHasDisplayDocument = !!aDisplayDocument;
+  }
+
+  /**
+   * A class that represents an external resource load that has begun but
+   * doesn't have a document yet.  Observers can be registered on this object,
+   * and will be notified after the document is created.  Observers registered
+   * after the document has been created will NOT be notified.  When observers
+   * are notified, the subject will be the newly-created document, the topic
+   * will be "external-resource-document-created", and the data will be null.
+   * If document creation fails for some reason, observers will still be
+   * notified, with a null document pointer.
+   */
+  class ExternalResourceLoad : public nsISupports
+  {
+  public:
+    virtual ~ExternalResourceLoad() {}
+
+    void AddObserver(nsIObserver* aObserver) {
+      MOZ_ASSERT(aObserver, "Must have observer");
+      mObservers.AppendElement(aObserver);
+    }
+
+    const nsTArray< nsCOMPtr<nsIObserver> > & Observers() {
+      return mObservers;
+    }
+  protected:
+    AutoTArray< nsCOMPtr<nsIObserver>, 8 > mObservers;
+  };
+
+  /**
+   * Request an external resource document for aURI.  This will return the
+   * resource document if available.  If one is not available yet, it will
+   * start loading as needed, and the pending load object will be returned in
+   * aPendingLoad so that the caller can register an observer to wait for the
+   * load.  If this function returns null and doesn't return a pending load,
+   * that means that there is no resource document for this URI and won't be
+   * one in the future.
+   *
+   * @param aURI the URI to get
+   * @param aRequestingNode the node making the request
+   * @param aPendingLoad the pending load for this request, if any
+   */
+  virtual nsIDocument*
+    RequestExternalResource(nsIURI* aURI,
+                            nsINode* aRequestingNode,
+                            ExternalResourceLoad** aPendingLoad) = 0;
+
+  /**
+   * Enumerate the external resource documents associated with this document.
+   * The enumerator callback should return true to continue enumerating, or
+   * false to stop.  This callback will never get passed a null aDocument.
+   */
+  virtual void EnumerateExternalResources(nsSubDocEnumFunc aCallback,
+                                          void* aData) = 0;
+
+  /**
+   * Return whether the document is currently showing (in the sense of
+   * OnPageShow() having been called already and OnPageHide() not having been
+   * called yet.
+   */
+  bool IsShowing() const { return mIsShowing; }
+  /**
+   * Return whether the document is currently visible (in the sense of
+   * OnPageHide having been called and OnPageShow not yet having been called)
+   */
+  bool IsVisible() const { return mVisible; }
+
+  /**
+   * Return whether the document and all its ancestors are visible in the sense of
+   * pageshow / hide.
+   */
+  bool IsVisibleConsideringAncestors() const;
+
+  /**
+   * Return true when this document is active, i.e., an active document
+   * in a content viewer.  Note that this will return true for bfcached
+   * documents, so this does NOT match the "active document" concept in
+   * the WHATWG spec - see IsCurrentActiveDocument.
+   */
+  bool IsActive() const { return mDocumentContainer && !mRemovedFromDocShell; }
+
+  /**
+   * Return true if this is the current active document for its
+   * docshell. Note that a docshell may have multiple active documents
+   * due to the bfcache -- this should be used when you need to
+   * differentiate the *current* active document from any active
+   * documents.
+   */
+  bool IsCurrentActiveDocument() const
+  {
+    nsPIDOMWindowInner* inner = GetInnerWindow();
+    return inner && inner->IsCurrentInnerWindow() && inner->GetDoc() == this;
+  }
+
+  /**
+   * Register/Unregister the ActivityObserver into mActivityObservers to listen
+   * the document's activity changes such as OnPageHide, visibility, activity.
+   * The ActivityObserver objects can be nsIObjectLoadingContent or
+   * nsIDocumentActivity or HTMLMEdiaElement.
+   */
+  void RegisterActivityObserver(nsISupports* aSupports);
+  bool UnregisterActivityObserver(nsISupports* aSupports);
+  // Enumerate all the observers in mActivityObservers by the aEnumerator.
+  typedef void (* ActivityObserverEnumerator)(nsISupports*, void*);
+  void EnumerateActivityObservers(ActivityObserverEnumerator aEnumerator,
+                                  void* aData);
+
+  // Indicates whether mAnimationController has been (lazily) initialized.
+  // If this returns true, we're promising that GetAnimationController()
+  // will have a non-null return value.
+  bool HasAnimationController()  { return !!mAnimationController; }
+
+  // Getter for this document's SMIL Animation Controller. Performs lazy
+  // initialization, if this document supports animation and if
+  // mAnimationController isn't yet initialized.
+  virtual nsSMILAnimationController* GetAnimationController() = 0;
+
+  // Gets the tracker for animations that are waiting to start.
+  // Returns nullptr if there is no pending animation tracker for this document
+  // which will be the case if there have never been any CSS animations or
+  // transitions on elements in the document.
+  virtual mozilla::PendingAnimationTracker* GetPendingAnimationTracker() = 0;
+
+  // Gets the tracker for animations that are waiting to start and
+  // creates it if it doesn't already exist. As a result, the return value
+  // will never be nullptr.
+  virtual mozilla::PendingAnimationTracker*
+  GetOrCreatePendingAnimationTracker() = 0;
+
+  enum SuppressionType {
+    eAnimationsOnly = 0x1,
+
+    // Note that suppressing events also suppresses animation frames, so
+    // there's no need to split out events in its own bitmask.
+    eEvents = 0x3,
+  };
+
+  /**
+   * Prevents user initiated events from being dispatched to the document and
+   * subdocuments.
+   */
+  virtual void SuppressEventHandling(SuppressionType aWhat,
+                                     uint32_t aIncrease = 1) = 0;
+
+  /**
+   * Unsuppress event handling.
+   * @param aFireEvents If true, delayed events (focus/blur) will be fired
+   *                    asynchronously.
+   */
+  virtual void UnsuppressEventHandlingAndFireEvents(SuppressionType aWhat,
+                                                    bool aFireEvents) = 0;
+
+  uint32_t EventHandlingSuppressed() const { return mEventsSuppressed; }
+  uint32_t AnimationsPaused() const { return mAnimationsPaused; }
+
+  bool IsEventHandlingEnabled() {
+    return !EventHandlingSuppressed() && mScriptGlobalObject;
+  }
+
+  /**
+   * Increment the number of external scripts being evaluated.
+   */
+  void BeginEvaluatingExternalScript() { ++mExternalScriptsBeingEvaluated; }
+
+  /**
+   * Decrement the number of external scripts being evaluated.
+   */
+  void EndEvaluatingExternalScript() { --mExternalScriptsBeingEvaluated; }
+
+  bool IsDNSPrefetchAllowed() const { return mAllowDNSPrefetch; }
+
+  /**
+   * Returns true if this document is allowed to contain XUL element and
+   * use non-builtin XBL bindings.
+   */
+  bool AllowXULXBL() {
+    return mAllowXULXBL == eTriTrue ? true :
+           mAllowXULXBL == eTriFalse ? false :
+           InternalAllowXULXBL();
+  }
+
+  void ForceEnableXULXBL() {
+    mAllowXULXBL = eTriTrue;
+  }
+
+  /**
+   * Returns the template content owner document that owns the content of
+   * HTMLTemplateElement.
+   */
+  virtual nsIDocument* GetTemplateContentsOwner() = 0;
+
+  /**
+   * Returns true if this document is a static clone of a normal document.
+   *
+   * We create static clones for print preview and printing (possibly other
+   * things in future).
+   *
+   * Note that static documents are also "loaded as data" (if this method
+   * returns true, IsLoadedAsData() will also return true).
+   */
+  bool IsStaticDocument() { return mIsStaticDocument; }
+
+  /**
+   * Clones the document along with any subdocuments, stylesheet, etc.
+   *
+   * The resulting document and everything it contains (including any
+   * sub-documents) are created purely via cloning.  The returned documents and
+   * any sub-documents are "loaded as data" documents to preserve the state as
+   * it was during the clone process (we don't want external resources to load
+   * and replace the cloned resources).
+   *
+   * @param aCloneContainer The container for the clone document.
+   */
+  virtual already_AddRefed<nsIDocument>
+  CreateStaticClone(nsIDocShell* aCloneContainer);
+
+  /**
+   * If this document is a static clone, this returns the original
+   * document.
+   */
+  nsIDocument* GetOriginalDocument()
+  {
+    MOZ_ASSERT(!mOriginalDocument || !mOriginalDocument->GetOriginalDocument());
+    return mOriginalDocument;
+  }
+
+  /**
+   * If this document is a static clone, let the original document know that
+   * we're going away and then release our reference to it.
+   */
+  void UnlinkOriginalDocumentIfStatic();
+
+  /**
+   * These are called by the parser as it encounters <picture> tags, the end of
+   * said tags, and possible picture <source srcset> sources respectively. These
+   * are used to inform ResolvePreLoadImage() calls.  Unset attributes are
+   * expected to be marked void.
+   *
+   * NOTE that the parser does not attempt to track the current picture nesting
+   * level or whether the given <source> tag is within a picture -- it is only
+   * guaranteed to order these calls properly with respect to
+   * ResolvePreLoadImage.
+   */
+
+  virtual void PreloadPictureOpened() = 0;
+
+  virtual void PreloadPictureClosed() = 0;
+
+  virtual void PreloadPictureImageSource(const nsAString& aSrcsetAttr,
+                                         const nsAString& aSizesAttr,
+                                         const nsAString& aTypeAttr,
+                                         const nsAString& aMediaAttr) = 0;
+
+  /**
+   * Called by the parser to resolve an image for preloading. The parser will
+   * call the PreloadPicture* functions to inform us of possible <picture>
+   * nesting and possible sources, which are used to inform URL selection
+   * responsive <picture> or <img srcset> images.  Unset attributes are expected
+   * to be marked void.
+   */
+  virtual already_AddRefed<nsIURI>
+    ResolvePreloadImage(nsIURI *aBaseURI,
+                        const nsAString& aSrcAttr,
+                        const nsAString& aSrcsetAttr,
+                        const nsAString& aSizesAttr) = 0;
+  /**
+   * Called by nsParser to preload images. Can be removed and code moved
+   * to nsPreloadURIs::PreloadURIs() in file nsParser.cpp whenever the
+   * parser-module is linked with gklayout-module.  aCrossOriginAttr should
+   * be a void string if the attr is not present.
+   */
+  virtual void MaybePreLoadImage(nsIURI* uri,
+                                 const nsAString& aCrossOriginAttr,
+                                 ReferrerPolicyEnum aReferrerPolicy) = 0;
+
+  /**
+   * Called by images to forget an image preload when they start doing
+   * the real load.
+   */
+  virtual void ForgetImagePreload(nsIURI* aURI) = 0;
+
+  /**
+   * Called by nsParser to preload style sheets.  Can also be merged into the
+   * parser if and when the parser is merged with libgklayout.  aCrossOriginAttr
+   * should be a void string if the attr is not present.
+   */
+  virtual void PreloadStyle(nsIURI* aURI, const nsAString& aCharset,
+                            const nsAString& aCrossOriginAttr,
+                            ReferrerPolicyEnum aReferrerPolicy,
+                            const nsAString& aIntegrity) = 0;
+
+  /**
+   * Called by the chrome registry to load style sheets.  Can be put
+   * back there if and when when that module is merged with libgklayout.
+   *
+   * This always does a synchronous load.  If aIsAgentSheet is true,
+   * it also uses the system principal and enables unsafe rules.
+   * DO NOT USE FOR UNTRUSTED CONTENT.
+   */
+  virtual nsresult LoadChromeSheetSync(nsIURI* aURI, bool aIsAgentSheet,
+                                       RefPtr<mozilla::StyleSheet>* aSheet) = 0;
+
+  /**
+   * Returns true if the locale used for the document specifies a direction of
+   * right to left. For chrome documents, this comes from the chrome registry.
+   * This is used to determine the current state for the :-moz-locale-dir pseudoclass
+   * so once can know whether a document is expected to be rendered left-to-right
+   * or right-to-left.
+   */
+  virtual bool IsDocumentRightToLeft() { return false; }
+
+  /**
+   * Called by Parser for link rel=preconnect
+   */
+  virtual void MaybePreconnect(nsIURI* uri,
+                               mozilla::CORSMode aCORSMode) = 0;
+
+  enum DocumentTheme {
+    Doc_Theme_Uninitialized, // not determined yet
+    Doc_Theme_None,
+    Doc_Theme_Neutral,
+    Doc_Theme_Dark,
+    Doc_Theme_Bright
+  };
+
+  /**
+   * Set the document's pending state object (as serialized using structured
+   * clone).
+   */
+  void SetStateObject(nsIStructuredCloneContainer *scContainer);
+
+  /**
+   * Returns Doc_Theme_None if there is no lightweight theme specified,
+   * Doc_Theme_Dark for a dark theme, Doc_Theme_Bright for a light theme, and
+   * Doc_Theme_Neutral for any other theme. This is used to determine the state
+   * of the pseudoclasses :-moz-lwtheme and :-moz-lwtheme-text.
+   */
+  virtual int GetDocumentLWTheme() { return Doc_Theme_None; }
+
+  /**
+   * Returns the document state.
+   * Document state bits have the form NS_DOCUMENT_STATE_* and are declared in
+   * nsIDocument.h.
+   */
+  virtual mozilla::EventStates GetDocumentState() = 0;
+
+  virtual nsISupports* GetCurrentContentSink() = 0;
+
+  virtual void SetScrollToRef(nsIURI *aDocumentURI) = 0;
+  virtual void ScrollToRef() = 0;
+  virtual void ResetScrolledToRefAlready() = 0;
+  virtual void SetChangeScrollPosWhenScrollingToRef(bool aValue) = 0;
+
+  /**
+   * This method is similar to GetElementById() from nsIDOMDocument but it
+   * returns a mozilla::dom::Element instead of a nsIDOMElement.
+   * It prevents converting nsIDOMElement to mozilla::dom::Element which is
+   * already converted from mozilla::dom::Element.
+   */
+  virtual Element* GetElementById(const nsAString& aElementId) = 0;
+
+  /**
+   * This method returns _all_ the elements in this document which
+   * have id aElementId, if there are any.  Otherwise it returns null.
+   */
+  virtual const nsTArray<Element*>* GetAllElementsForId(const nsAString& aElementId) const = 0;
+
+  /**
+   * Lookup an image element using its associated ID, which is usually provided
+   * by |-moz-element()|. Similar to GetElementById, with the difference that
+   * elements set using mozSetImageElement have higher priority.
+   * @param aId the ID associated the element we want to lookup
+   * @return the element associated with |aId|
+   */
+  virtual Element* LookupImageElement(const nsAString& aElementId) = 0;
+
+  virtual mozilla::dom::DocumentTimeline* Timeline() = 0;
+  virtual mozilla::LinkedList<mozilla::dom::DocumentTimeline>& Timelines() = 0;
+
+  virtual void GetAnimations(
+      nsTArray<RefPtr<mozilla::dom::Animation>>& aAnimations) = 0;
+
+  mozilla::dom::SVGSVGElement* GetSVGRootElement() const;
+
+  nsresult ScheduleFrameRequestCallback(mozilla::dom::FrameRequestCallback& aCallback,
+                                        int32_t *aHandle);
+  void CancelFrameRequestCallback(int32_t aHandle);
+
+  typedef nsTArray<RefPtr<mozilla::dom::FrameRequestCallback>> FrameRequestCallbackList;
+  /**
+   * Put this document's frame request callbacks into the provided
+   * list, and forget about them.
+   */
+  void TakeFrameRequestCallbacks(FrameRequestCallbackList& aCallbacks);
+
+  /**
+   * @return true if this document's frame request callbacks should be
+   * throttled. We throttle requestAnimationFrame for documents which aren't
+   * visible (e.g. scrolled out of the viewport).
+   */
+  bool ShouldThrottleFrameRequests();
+
+  // This returns true when the document tree is being teared down.
+  bool InUnlinkOrDeletion() { return mInUnlinkOrDeletion; }
+
+  mozilla::dom::ImageTracker* ImageTracker();
+
+  virtual nsresult AddPlugin(nsIObjectLoadingContent* aPlugin) = 0;
+  virtual void RemovePlugin(nsIObjectLoadingContent* aPlugin) = 0;
+  virtual void GetPlugins(nsTArray<nsIObjectLoadingContent*>& aPlugins) = 0;
+
+  virtual nsresult AddResponsiveContent(nsIContent* aContent) = 0;
+  virtual void RemoveResponsiveContent(nsIContent* aContent) = 0;
+  virtual void NotifyMediaFeatureValuesChanged() = 0;
+
+  virtual nsresult GetStateObject(nsIVariant** aResult) = 0;
+
+  virtual nsDOMNavigationTiming* GetNavigationTiming() const = 0;
+
+  virtual nsresult SetNavigationTiming(nsDOMNavigationTiming* aTiming) = 0;
+
+  virtual Element* FindImageMap(const nsAString& aNormalizedMapName) = 0;
+
+  // Add aLink to the set of links that need their status resolved.
+  void RegisterPendingLinkUpdate(mozilla::dom::Link* aLink);
+
+  // Remove aLink from the set of links that need their status resolved.
+  // This function must be called when links are removed from the document.
+  void UnregisterPendingLinkUpdate(mozilla::dom::Link* aElement);
+
+  // Update state on links in mLinksToUpdate.  This function must
+  // be called prior to selector matching.
+  void FlushPendingLinkUpdates();
+
+#define DEPRECATED_OPERATION(_op) e##_op,
+  enum DeprecatedOperations {
+#include "nsDeprecatedOperationList.h"
+    eDeprecatedOperationCount
+  };
+#undef DEPRECATED_OPERATION
+  bool HasWarnedAbout(DeprecatedOperations aOperation) const;
+  void WarnOnceAbout(DeprecatedOperations aOperation,
+                     bool asError = false) const;
+
+#define DOCUMENT_WARNING(_op) e##_op,
+  enum DocumentWarnings {
+#include "nsDocumentWarningList.h"
+    eDocumentWarningCount
+  };
+#undef DOCUMENT_WARNING
+  bool HasWarnedAbout(DocumentWarnings aWarning) const;
+  void WarnOnceAbout(DocumentWarnings aWarning,
+                     bool asError = false,
+                     const char16_t **aParams = nullptr,
+                     uint32_t aParamsLength = 0) const;
+
+  virtual void PostVisibilityUpdateEvent() = 0;
+
+  bool IsSyntheticDocument() const { return mIsSyntheticDocument; }
+
+  void SetNeedLayoutFlush() {
+    mNeedLayoutFlush = true;
+    if (mDisplayDocument) {
+      mDisplayDocument->SetNeedLayoutFlush();
+    }
+  }
+
+  void SetNeedStyleFlush() {
+    mNeedStyleFlush = true;
+    if (mDisplayDocument) {
+      mDisplayDocument->SetNeedStyleFlush();
+    }
+  }
+
+  // Note: nsIDocument is a sub-class of nsINode, which has a
+  // SizeOfExcludingThis function.  However, because nsIDocument objects can
+  // only appear at the top of the DOM tree, we have a specialized measurement
+  // function which returns multiple sizes.
+  virtual void DocAddSizeOfExcludingThis(nsWindowSizes* aWindowSizes) const;
+  // DocAddSizeOfIncludingThis doesn't need to be overridden by sub-classes
+  // because nsIDocument inherits from nsINode;  see the comment above the
+  // declaration of nsINode::SizeOfIncludingThis.
+  virtual void DocAddSizeOfIncludingThis(nsWindowSizes* aWindowSizes) const;
+
+  bool MayHaveDOMMutationObservers()
+  {
+    return mMayHaveDOMMutationObservers;
+  }
+
+  void SetMayHaveDOMMutationObservers()
+  {
+    mMayHaveDOMMutationObservers = true;
+  }
+
+  bool MayHaveAnimationObservers()
+  {
+    return mMayHaveAnimationObservers;
+  }
+
+  void SetMayHaveAnimationObservers()
+  {
+    mMayHaveAnimationObservers = true;
+  }
+
+  bool IsInSyncOperation()
+  {
+    return mInSyncOperationCount != 0;
+  }
+
+  void SetIsInSyncOperation(bool aSync)
+  {
+    if (aSync) {
+      ++mInSyncOperationCount;
+    } else {
+      --mInSyncOperationCount;
+    }
+  }
+
+  bool CreatingStaticClone() const
+  {
+    return mCreatingStaticClone;
+  }
+
+  /**
+   * Creates a new element in the HTML namespace with a local name given by
+   * aTag.
+   */
+  already_AddRefed<Element> CreateHTMLElement(nsIAtom* aTag);
+
+  // WebIDL API
+  nsIGlobalObject* GetParentObject() const
+  {
+    return GetScopeObject();
+  }
+  static already_AddRefed<nsIDocument>
+    Constructor(const GlobalObject& aGlobal,
+                mozilla::ErrorResult& rv);
+  virtual mozilla::dom::DOMImplementation*
+    GetImplementation(mozilla::ErrorResult& rv) = 0;
+  MOZ_MUST_USE nsresult GetURL(nsString& retval) const;
+  MOZ_MUST_USE nsresult GetDocumentURI(nsString& retval) const;
+  // Return the URI for the document.
+  // The returned value may differ if the document is loaded via XHR, and
+  // when accessed from chrome privileged script and
+  // from content privileged script for compatibility.
+  void GetDocumentURIFromJS(nsString& aDocumentURI,
+                            mozilla::ErrorResult& aRv) const;
+  void GetCompatMode(nsString& retval) const;
+  void GetCharacterSet(nsAString& retval) const;
+  // Skip GetContentType, because our NS_IMETHOD version above works fine here.
+  // GetDoctype defined above
+  Element* GetDocumentElement() const
+  {
+    return GetRootElement();
+  }
+
+  enum ElementCallbackType {
+    eCreated,
+    eAttached,
+    eDetached,
+    eAttributeChanged
+  };
+
+  nsIDocument* GetTopLevelContentDocument();
+
+  virtual void
+    RegisterElement(JSContext* aCx, const nsAString& aName,
+                    const mozilla::dom::ElementRegistrationOptions& aOptions,
+                    JS::MutableHandle<JSObject*> aRetval,
+                    mozilla::ErrorResult& rv) = 0;
+  virtual already_AddRefed<mozilla::dom::CustomElementRegistry>
+    GetCustomElementRegistry() = 0;
+
+  already_AddRefed<nsContentList>
+  GetElementsByTagName(const nsAString& aTagName)
+  {
+    return NS_GetContentList(this, kNameSpaceID_Unknown, aTagName);
+  }
+  already_AddRefed<nsContentList>
+    GetElementsByTagNameNS(const nsAString& aNamespaceURI,
+                           const nsAString& aLocalName,
+                           mozilla::ErrorResult& aResult);
+  already_AddRefed<nsContentList>
+    GetElementsByClassName(const nsAString& aClasses);
+  // GetElementById defined above
+  virtual already_AddRefed<Element>
+    CreateElement(const nsAString& aTagName,
+                  const mozilla::dom::ElementCreationOptionsOrString& aOptions,
+                  mozilla::ErrorResult& rv) = 0;
+  virtual already_AddRefed<Element>
+    CreateElementNS(const nsAString& aNamespaceURI,
+                    const nsAString& aQualifiedName,
+                    const mozilla::dom::ElementCreationOptionsOrString& aOptions,
+                    mozilla::ErrorResult& rv) = 0;
+  already_AddRefed<mozilla::dom::DocumentFragment>
+    CreateDocumentFragment() const;
+  already_AddRefed<nsTextNode> CreateTextNode(const nsAString& aData) const;
+  already_AddRefed<mozilla::dom::Comment>
+    CreateComment(const nsAString& aData) const;
+  already_AddRefed<mozilla::dom::ProcessingInstruction>
+    CreateProcessingInstruction(const nsAString& target, const nsAString& data,
+                                mozilla::ErrorResult& rv) const;
+  already_AddRefed<nsINode>
+    ImportNode(nsINode& aNode, bool aDeep, mozilla::ErrorResult& rv) const;
+  nsINode* AdoptNode(nsINode& aNode, mozilla::ErrorResult& rv);
+  already_AddRefed<mozilla::dom::Event>
+    CreateEvent(const nsAString& aEventType, mozilla::ErrorResult& rv) const;
+  already_AddRefed<nsRange> CreateRange(mozilla::ErrorResult& rv);
+  already_AddRefed<mozilla::dom::NodeIterator>
+    CreateNodeIterator(nsINode& aRoot, uint32_t aWhatToShow,
+                       mozilla::dom::NodeFilter* aFilter,
+                       mozilla::ErrorResult& rv) const;
+  already_AddRefed<mozilla::dom::NodeIterator>
+    CreateNodeIterator(nsINode& aRoot, uint32_t aWhatToShow,
+                       mozilla::dom::NodeFilterHolder aFilter,
+                       mozilla::ErrorResult& rv) const;
+  already_AddRefed<mozilla::dom::TreeWalker>
+    CreateTreeWalker(nsINode& aRoot, uint32_t aWhatToShow,
+                     mozilla::dom::NodeFilter* aFilter, mozilla::ErrorResult& rv) const;
+  already_AddRefed<mozilla::dom::TreeWalker>
+    CreateTreeWalker(nsINode& aRoot, uint32_t aWhatToShow,
+                     mozilla::dom::NodeFilterHolder aFilter,
+                     mozilla::ErrorResult& rv) const;
+
+  // Deprecated WebIDL bits
+  already_AddRefed<mozilla::dom::CDATASection>
+    CreateCDATASection(const nsAString& aData, mozilla::ErrorResult& rv);
+  already_AddRefed<mozilla::dom::Attr>
+    CreateAttribute(const nsAString& aName, mozilla::ErrorResult& rv);
+  already_AddRefed<mozilla::dom::Attr>
+    CreateAttributeNS(const nsAString& aNamespaceURI,
+                      const nsAString& aQualifiedName,
+                      mozilla::ErrorResult& rv);
+  void GetInputEncoding(nsAString& aInputEncoding) const;
+  already_AddRefed<mozilla::dom::Location> GetLocation() const;
+  void GetReferrer(nsAString& aReferrer) const;
+  void GetLastModified(nsAString& aLastModified) const;
+  void GetReadyState(nsAString& aReadyState) const;
+  // Not const because otherwise the compiler can't figure out whether to call
+  // this GetTitle or the nsAString version from non-const methods, since
+  // neither is an exact match.
+  virtual void GetTitle(nsString& aTitle) = 0;
+  virtual void SetTitle(const nsAString& aTitle, mozilla::ErrorResult& rv) = 0;
+  void GetDir(nsAString& aDirection) const;
+  void SetDir(const nsAString& aDirection);
+  nsPIDOMWindowOuter* GetDefaultView() const
+  {
+    return GetWindow();
+  }
+  Element* GetActiveElement();
+  bool HasFocus(mozilla::ErrorResult& rv) const;
+  // Event handlers are all on nsINode already
+  bool MozSyntheticDocument() const
+  {
+    return IsSyntheticDocument();
+  }
+  Element* GetCurrentScript();
+  void ReleaseCapture() const;
+  virtual void MozSetImageElement(const nsAString& aImageElementId,
+                                  Element* aElement) = 0;
+  nsIURI* GetDocumentURIObject() const;
+  // Not const because all the full-screen goop is not const
+  virtual bool FullscreenEnabled() = 0;
+  virtual Element* GetFullscreenElement() = 0;
+  bool Fullscreen()
+  {
+    return !!GetFullscreenElement();
+  }
+  void ExitFullscreen();
+  Element* GetPointerLockElement();
+  void ExitPointerLock()
+  {
+    UnlockPointer(this);
+  }
+#ifdef MOZILLA_INTERNAL_API
+  bool Hidden() const
+  {
+    return mVisibilityState != mozilla::dom::VisibilityState::Visible;
+  }
+  mozilla::dom::VisibilityState VisibilityState() const
+  {
+    return mVisibilityState;
+  }
+#endif
+  virtual mozilla::dom::StyleSheetList* StyleSheets() = 0;
+  void GetSelectedStyleSheetSet(nsAString& aSheetSet);
+  virtual void SetSelectedStyleSheetSet(const nsAString& aSheetSet) = 0;
+  virtual void GetLastStyleSheetSet(nsString& aSheetSet) = 0;
+  void GetPreferredStyleSheetSet(nsAString& aSheetSet);
+  virtual mozilla::dom::DOMStringList* StyleSheetSets() = 0;
+  virtual void EnableStyleSheetsForSet(const nsAString& aSheetSet) = 0;
+  Element* ElementFromPoint(float aX, float aY);
+  void ElementsFromPoint(float aX,
+                         float aY,
+                         nsTArray<RefPtr<mozilla::dom::Element>>& aElements);
+
+  /**
+   * Retrieve the location of the caret position (DOM node and character
+   * offset within that node), given a point.
+   *
+   * @param aX Horizontal point at which to determine the caret position, in
+   *           page coordinates.
+   * @param aY Vertical point at which to determine the caret position, in
+   *           page coordinates.
+   */
+  already_AddRefed<nsDOMCaretPosition>
+    CaretPositionFromPoint(float aX, float aY);
+
+  Element* GetScrollingElement();
+
+  // QuerySelector and QuerySelectorAll already defined on nsINode
+  nsINodeList* GetAnonymousNodes(Element& aElement);
+  Element* GetAnonymousElementByAttribute(Element& aElement,
+                                          const nsAString& aAttrName,
+                                          const nsAString& aAttrValue);
+  Element* GetBindingParent(nsINode& aNode);
+  void LoadBindingDocument(const nsAString& aURI,
+                           nsIPrincipal& aSubjectPrincipal,
+                           mozilla::ErrorResult& rv);
+  void LoadBindingDocument(const nsAString& aURI,
+                           const mozilla::Maybe<nsIPrincipal*>& aSubjectPrincipal,
+                           mozilla::ErrorResult& rv);
+  mozilla::dom::XPathExpression*
+    CreateExpression(const nsAString& aExpression,
+                     mozilla::dom::XPathNSResolver* aResolver,
+                     mozilla::ErrorResult& rv);
+  nsINode* CreateNSResolver(nsINode& aNodeResolver);
+  already_AddRefed<mozilla::dom::XPathResult>
+    Evaluate(JSContext* aCx, const nsAString& aExpression, nsINode& aContextNode,
+             mozilla::dom::XPathNSResolver* aResolver, uint16_t aType,
+             JS::Handle<JSObject*> aResult, mozilla::ErrorResult& rv);
+  // Touch event handlers already on nsINode
+  already_AddRefed<mozilla::dom::Touch>
+    CreateTouch(nsGlobalWindow* aView, mozilla::dom::EventTarget* aTarget,
+                int32_t aIdentifier, int32_t aPageX, int32_t aPageY,
+                int32_t aScreenX, int32_t aScreenY, int32_t aClientX,
+                int32_t aClientY, int32_t aRadiusX, int32_t aRadiusY,
+                float aRotationAngle, float aForce);
+  already_AddRefed<mozilla::dom::TouchList> CreateTouchList();
+  already_AddRefed<mozilla::dom::TouchList>
+    CreateTouchList(mozilla::dom::Touch& aTouch,
+                    const mozilla::dom::Sequence<mozilla::OwningNonNull<mozilla::dom::Touch> >& aTouches);
+  already_AddRefed<mozilla::dom::TouchList>
+    CreateTouchList(const mozilla::dom::Sequence<mozilla::OwningNonNull<mozilla::dom::Touch> >& aTouches);
+
+  void SetStyleSheetChangeEventsEnabled(bool aValue)
+  {
+    mStyleSheetChangeEventsEnabled = aValue;
+  }
+
+  bool StyleSheetChangeEventsEnabled() const
+  {
+    return mStyleSheetChangeEventsEnabled;
+  }
+
+  void ObsoleteSheet(nsIURI *aSheetURI, mozilla::ErrorResult& rv);
+
+  void ObsoleteSheet(const nsAString& aSheetURI, mozilla::ErrorResult& rv);
+
+  already_AddRefed<nsIURI> GetMozDocumentURIIfNotForErrorPages();
+
+  // ParentNode
+  nsIHTMLCollection* Children();
+  uint32_t ChildElementCount();
+
+  virtual nsHTMLDocument* AsHTMLDocument() { return nullptr; }
+  virtual mozilla::dom::SVGDocument* AsSVGDocument() { return nullptr; }
+
+  // The root document of the import tree. If this document is not an import
+  // this will return the document itself.
+  virtual nsIDocument* MasterDocument() = 0;
+  virtual void SetMasterDocument(nsIDocument* master) = 0;
+  virtual bool IsMasterDocument() = 0;
+  virtual mozilla::dom::ImportManager* ImportManager() = 0;
+  // We keep track of the order of sub imports were added to the document.
+  virtual bool HasSubImportLink(nsINode* aLink) = 0;
+  virtual uint32_t IndexOfSubImportLink(nsINode* aLink) = 0;
+  virtual void AddSubImportLink(nsINode* aLink) = 0;
+  virtual nsINode* GetSubImportLink(uint32_t aIdx) = 0;
+
+  /*
+   * Given a node, get a weak reference to it and append that reference to
+   * mBlockedTrackingNodes. Can be used later on to look up a node in it.
+   * (e.g., by the UI)
+   */
+  void AddBlockedTrackingNode(nsINode *node)
+  {
+    if (!node) {
+      return;
+    }
+
+    nsWeakPtr weakNode = do_GetWeakReference(node);
+
+    if (weakNode) {
+      mBlockedTrackingNodes.AppendElement(weakNode);
+    }
+  }
+
+  gfxUserFontSet* GetUserFontSet(bool aFlushUserFontSet = true);
+  void FlushUserFontSet();
+  void RebuildUserFontSet(); // asynchronously
+  mozilla::dom::FontFaceSet* GetFonts() { return mFontFaceSet; }
+
+  // FontFaceSource
+  mozilla::dom::FontFaceSet* Fonts();
+
+  bool DidFireDOMContentLoaded() const { return mDidFireDOMContentLoaded; }
+
+  void SetDocumentUseCounter(mozilla::UseCounter aUseCounter)
+  {
+    if (!mUseCounters[aUseCounter]) {
+      mUseCounters[aUseCounter] = true;
+    }
+  }
+
+  void SetPageUseCounter(mozilla::UseCounter aUseCounter);
+
+  void SetDocumentAndPageUseCounter(mozilla::UseCounter aUseCounter)
+  {
+    SetDocumentUseCounter(aUseCounter);
+    SetPageUseCounter(aUseCounter);
+  }
+
+  void PropagateUseCounters(nsIDocument* aParentDocument);
+
+  void SetUserHasInteracted(bool aUserHasInteracted)
+  {
+    mUserHasInteracted = aUserHasInteracted;
+  }
+
+  bool UserHasInteracted()
+  {
+    return mUserHasInteracted;
+  }
+
+  bool HasScriptsBlockedBySandbox();
+
+  bool InlineScriptAllowedByCSP();
+
+  void ReportHasScrollLinkedEffect();
+  bool HasScrollLinkedEffect() const
+  {
+    return mHasScrollLinkedEffect;
+  }
+
+  mozilla::dom::DocGroup* GetDocGroup();
+
+  virtual void AddIntersectionObserver(
+    mozilla::dom::DOMIntersectionObserver* aObserver) = 0;
+  virtual void RemoveIntersectionObserver(
+    mozilla::dom::DOMIntersectionObserver* aObserver) = 0;
+
+  virtual void UpdateIntersectionObservations() = 0;
+  virtual void ScheduleIntersectionObserverNotification() = 0;
+  virtual void NotifyIntersectionObservers() = 0;
+
+protected:
+  bool GetUseCounter(mozilla::UseCounter aUseCounter)
+  {
+    return mUseCounters[aUseCounter];
+  }
+
+  void SetChildDocumentUseCounter(mozilla::UseCounter aUseCounter)
+  {
+    if (!mChildDocumentUseCounters[aUseCounter]) {
+      mChildDocumentUseCounters[aUseCounter] = true;
+    }
+  }
+
+  bool GetChildDocumentUseCounter(mozilla::UseCounter aUseCounter)
+  {
+    return mChildDocumentUseCounters[aUseCounter];
+  }
+
+private:
+  mutable std::bitset<eDeprecatedOperationCount> mDeprecationWarnedAbout;
+  mutable std::bitset<eDocumentWarningCount> mDocWarningWarnedAbout;
+  SelectorCache mSelectorCache;
+
+protected:
+  ~nsIDocument();
+  nsPropertyTable* GetExtraPropertyTable(uint16_t aCategory);
+
+  // Never ever call this. Only call GetWindow!
+  virtual nsPIDOMWindowOuter* GetWindowInternal() const = 0;
+
+  // Never ever call this. Only call GetScriptHandlingObject!
+  virtual nsIScriptGlobalObject* GetScriptHandlingObjectInternal() const = 0;
+
+  // Never ever call this. Only call AllowXULXBL!
+  virtual bool InternalAllowXULXBL() = 0;
+
+  /**
+   * These methods should be called before and after dispatching
+   * a mutation event.
+   * To make this easy and painless, use the mozAutoSubtreeModified helper class.
+   */
+  virtual void WillDispatchMutationEvent(nsINode* aTarget) = 0;
+  virtual void MutationEventDispatched(nsINode* aTarget) = 0;
+  friend class mozAutoSubtreeModified;
+
+  virtual Element* GetNameSpaceElement() override
+  {
+    return GetRootElement();
+  }
+
+  void SetContentTypeInternal(const nsACString& aType);
+
+  nsCString GetContentTypeInternal() const
+  {
+    return mContentType;
+  }
+
+  mozilla::dom::XPathEvaluator* XPathEvaluator();
+
+  void HandleRebuildUserFontSet() {
+    mPostedFlushUserFontSet = false;
+    FlushUserFontSet();
+  }
+
+  const nsString& GetId() const
+  {
+    return mId;
+  }
+
+  // Update our frame request callback scheduling state, if needed.  This will
+  // schedule or unschedule them, if necessary, and update
+  // mFrameRequestCallbacksScheduled.  aOldShell should only be passed when
+  // mPresShell is becoming null; in that case it will be used to get hold of
+  // the relevant refresh driver.
+  void UpdateFrameRequestCallbackSchedulingState(nsIPresShell* aOldShell = nullptr);
+
+  nsCString mReferrer;
+  nsString mLastModified;
+
+  nsCOMPtr<nsIURI> mDocumentURI;
+  nsCOMPtr<nsIURI> mOriginalURI;
+  nsCOMPtr<nsIURI> mChromeXHRDocURI;
+  nsCOMPtr<nsIURI> mDocumentBaseURI;
+  nsCOMPtr<nsIURI> mChromeXHRDocBaseURI;
+
+  nsWeakPtr mDocumentLoadGroup;
+
+  bool mReferrerPolicySet;
+  ReferrerPolicyEnum mReferrerPolicy;
+
+  bool mBlockAllMixedContent;
+  bool mBlockAllMixedContentPreloads;
+  bool mUpgradeInsecureRequests;
+  bool mUpgradeInsecurePreloads;
+
+  // if nsMixedContentBlocker requires sending an HSTS priming request,
+  // temporarily store that in the document so that it can be propogated to the
+  // LoadInfo and eventually the HTTP Channel
+  nsDataHashtable<nsURIHashKey, HSTSPrimingState> mHSTSPrimingURIList;
+
+  mozilla::WeakPtr<nsDocShell> mDocumentContainer;
+
+  nsCString mCharacterSet;
+  int32_t mCharacterSetSource;
+
+  // This is just a weak pointer; the parent document owns its children.
+  nsIDocument* mParentDocument;
+
+  // A reference to the element last returned from GetRootElement().
+  mozilla::dom::Element* mCachedRootElement;
+
+  // This is a weak reference, but we hold a strong reference to mNodeInfo,
+  // which in turn holds a strong reference to this mNodeInfoManager.
+  nsNodeInfoManager* mNodeInfoManager;
+  RefPtr<mozilla::css::Loader> mCSSLoader;
+  RefPtr<mozilla::css::ImageLoader> mStyleImageLoader;
+  RefPtr<nsHTMLStyleSheet> mAttrStyleSheet;
+  RefPtr<nsHTMLCSSStyleSheet> mStyleAttrStyleSheet;
+  RefPtr<mozilla::SVGAttrAnimationRuleProcessor> mSVGAttrAnimationRuleProcessor;
+
+  // Tracking for images in the document.
+  RefPtr<mozilla::dom::ImageTracker> mImageTracker;
+
+  // The set of all object, embed, applet, video/audio elements or
+  // nsIObjectLoadingContent or nsIDocumentActivity for which this is the
+  // owner document. (They might not be in the document.)
+  // These are non-owning pointers, the elements are responsible for removing
+  // themselves when they go away.
+  nsAutoPtr<nsTHashtable<nsPtrHashKey<nsISupports> > > mActivityObservers;
+
+  // The set of all links that need their status resolved.  Links must add themselves
+  // to this set by calling RegisterPendingLinkUpdate when added to a document and must
+  // remove themselves by calling UnregisterPendingLinkUpdate when removed from a document.
+  nsTHashtable<nsPtrHashKey<mozilla::dom::Link> > mLinksToUpdate;
+
+  // SMIL Animation Controller, lazily-initialized in GetAnimationController
+  RefPtr<nsSMILAnimationController> mAnimationController;
+
+  // Table of element properties for this document.
+  nsPropertyTable mPropertyTable;
+  nsTArray<nsAutoPtr<nsPropertyTable> > mExtraPropertyTables;
+
+  // Our cached .children collection
+  nsCOMPtr<nsIHTMLCollection> mChildrenCollection;
+
+  // container for per-context fonts (downloadable, SVG, etc.)
+  RefPtr<mozilla::dom::FontFaceSet> mFontFaceSet;
+
+  // Compatibility mode
+  nsCompatibility mCompatMode;
+
+  // Our readyState
+  ReadyState mReadyState;
+
+#ifdef MOZILLA_INTERNAL_API
+  // Our visibility state
+  mozilla::dom::VisibilityState mVisibilityState;
+  static_assert(sizeof(mozilla::dom::VisibilityState) == sizeof(uint32_t), "Error size of mVisibilityState and mDummy");
+#else
+  uint32_t mDummy;
+#endif
+
+  // Whether this document has (or will have, once we have a pres shell) a
+  // Gecko- or Servo-backed style system.
+  mozilla::StyleBackendType mStyleBackendType;
+
+  // True if BIDI is enabled.
+  bool mBidiEnabled : 1;
+  // True if a MathML element has ever been owned by this document.
+  bool mMathMLEnabled : 1;
+
+  // True if this document is the initial document for a window.  This should
+  // basically be true only for documents that exist in newly-opened windows or
+  // documents created to satisfy a GetDocument() on a window when there's no
+  // document in it.
+  bool mIsInitialDocumentInWindow : 1;
+
+  // True if we're loaded as data and therefor has any dangerous stuff, such
+  // as scripts and plugins, disabled.
+  bool mLoadedAsData : 1;
+
+  // This flag is only set in XMLDocument, for e.g. documents used in XBL. We
+  // don't want animations to play in such documents, so we need to store the
+  // flag here so that we can check it in nsDocument::GetAnimationController.
+  bool mLoadedAsInteractiveData : 1;
+
+  // If true, whoever is creating the document has gotten it to the
+  // point where it's safe to start layout on it.
+  bool mMayStartLayout : 1;
+
+  // True iff we've ever fired a DOMTitleChanged event for this document
+  bool mHaveFiredTitleChange : 1;
+
+  // State for IsShowing(). mIsShowing starts off false. It becomes true when
+  // OnPageShow happens and becomes false when OnPageHide happens. So it's false
+  // before the initial load completes and when we're in bfcache or unloaded,
+  // true otherwise.
+  bool mIsShowing : 1;
+
+  // State for IsVisible(). mVisible starts off true. It becomes false when
+  // OnPageHide happens, and becomes true again when OnPageShow happens.  So
+  // it's false only when we're in bfcache or unloaded.
+  bool mVisible : 1;
+
+  // True if our content viewer has been removed from the docshell
+  // (it may still be displayed, but in zombie state). Form control data
+  // has been saved.
+  bool mRemovedFromDocShell : 1;
+
+  // True iff DNS prefetch is allowed for this document.  Note that if the
+  // document has no window, DNS prefetch won't be performed no matter what.
+  bool mAllowDNSPrefetch : 1;
+
+  // True when this document is a static clone of a normal document
+  bool mIsStaticDocument : 1;
+
+  // True while this document is being cloned to a static document.
+  bool mCreatingStaticClone : 1;
+
+  // True iff the document is being unlinked or deleted.
+  bool mInUnlinkOrDeletion : 1;
+
+  // True if document has ever had script handling object.
+  bool mHasHadScriptHandlingObject : 1;
+
+  // True if we're an SVG document being used as an image.
+  bool mIsBeingUsedAsImage : 1;
+
+  // True is this document is synthetic : stand alone image, video, audio
+  // file, etc.
+  bool mIsSyntheticDocument : 1;
+
+  // True if this document has links whose state needs updating
+  bool mHasLinksToUpdate : 1;
+
+  // True if a layout flush might not be a no-op
+  bool mNeedLayoutFlush : 1;
+
+  // True if a style flush might not be a no-op
+  bool mNeedStyleFlush : 1;
+
+  // True if a DOMMutationObserver is perhaps attached to a node in the document.
+  bool mMayHaveDOMMutationObservers : 1;
+
+  // True if an nsIAnimationObserver is perhaps attached to a node in the document.
+  bool mMayHaveAnimationObservers : 1;
+
+  // True if a document has loaded Mixed Active Script (see nsMixedContentBlocker.cpp)
+  bool mHasMixedActiveContentLoaded : 1;
+
+  // True if a document has blocked Mixed Active Script (see nsMixedContentBlocker.cpp)
+  bool mHasMixedActiveContentBlocked : 1;
+
+  // True if a document has loaded Mixed Display/Passive Content (see nsMixedContentBlocker.cpp)
+  bool mHasMixedDisplayContentLoaded : 1;
+
+  // True if a document has blocked Mixed Display/Passive Content (see nsMixedContentBlocker.cpp)
+  bool mHasMixedDisplayContentBlocked : 1;
+
+  // True if a document loads a plugin object that attempts to load mixed content subresources through necko(see nsMixedContentBlocker.cpp)
+  bool mHasMixedContentObjectSubrequest : 1;
+
+  // True if a document load has a CSP attached.
+  bool mHasCSP : 1;
+
+  // True if a document load has a CSP with unsafe-eval attached.
+  bool mHasUnsafeEvalCSP : 1;
+
+  // True if a document load has a CSP with unsafe-inline attached.
+  bool mHasUnsafeInlineCSP : 1;
+
+  // True if a document has blocked Tracking Content
+  bool mHasTrackingContentBlocked : 1;
+
+  // True if a document has loaded Tracking Content
+  bool mHasTrackingContentLoaded : 1;
+
+  // True if DisallowBFCaching has been called on this document.
+  bool mBFCacheDisallowed : 1;
+
+  bool mHasHadDefaultView : 1;
+
+  // Whether style sheet change events will be dispatched for this document
+  bool mStyleSheetChangeEventsEnabled : 1;
+
+  // Whether the document was created by a srcdoc iframe.
+  bool mIsSrcdocDocument : 1;
+
+  // Records whether we've done a document.open. If this is true, it's possible
+  // for nodes from this document to have outdated wrappers in their wrapper
+  // caches.
+  bool mDidDocumentOpen : 1;
+
+  // Whether this document has a display document and thus is considered to
+  // be a resource document.  Normally this is the same as !!mDisplayDocument,
+  // but mDisplayDocument is cleared during Unlink.  mHasDisplayDocument is
+  // valid in the document's destructor.
+  bool mHasDisplayDocument : 1;
+
+  // Is the current mFontFaceSet valid?
+  bool mFontFaceSetDirty : 1;
+
+  // Has GetUserFontSet() been called?
+  bool mGetUserFontSetCalled : 1;
+
+  // Do we currently have an event posted to call FlushUserFontSet?
+  bool mPostedFlushUserFontSet : 1;
+
+  // True is document has ever been in a foreground window.
+  bool mEverInForeground : 1;
+
+  // True if we have fired the DOMContentLoaded event, or don't plan to fire one
+  // (e.g. we're not being parsed at all).
+  bool mDidFireDOMContentLoaded : 1;
+
+  // True if ReportHasScrollLinkedEffect() has been called.
+  bool mHasScrollLinkedEffect : 1;
+
+  // True if we have frame request callbacks scheduled with the refresh driver.
+  // This should generally be updated only via
+  // UpdateFrameRequestCallbackSchedulingState.
+  bool mFrameRequestCallbacksScheduled : 1;
+
+  enum Type {
+    eUnknown, // should never be used
+    eHTML,
+    eXHTML,
+    eGenericXML,
+    eSVG,
+    eXUL
+  };
+
+  Type mType;
+
+  uint8_t mDefaultElementType;
+
+  enum Tri {
+    eTriUnset = 0,
+    eTriFalse,
+    eTriTrue
+  };
+
+  Tri mAllowXULXBL;
+
+#ifdef DEBUG
+  /**
+   * This is true while FlushPendingLinkUpdates executes.  Calls to
+   * [Un]RegisterPendingLinkUpdate will assert when this is true.
+   */
+  bool mIsLinkUpdateRegistrationsForbidden;
+#endif
+
+  // The document's script global object, the object from which the
+  // document can get its script context and scope. This is the
+  // *inner* window object.
+  nsCOMPtr<nsIScriptGlobalObject> mScriptGlobalObject;
+
+  // If mIsStaticDocument is true, mOriginalDocument points to the original
+  // document.
+  nsCOMPtr<nsIDocument> mOriginalDocument;
+
+  // The bidi options for this document.  What this bitfield means is
+  // defined in nsBidiUtils.h
+  uint32_t mBidiOptions;
+
+  // The sandbox flags on the document. These reflect the value of the sandbox attribute of the
+  // associated IFRAME or CSP-protectable content, if existent. These are set at load time and
+  // are immutable - see nsSandboxFlags.h for the possible flags.
+  uint32_t mSandboxFlags;
+
+  nsCString mContentLanguage;
+
+  // The channel that got passed to nsDocument::StartDocumentLoad(), if any.
+  nsCOMPtr<nsIChannel> mChannel;
+private:
+  nsCString mContentType;
+  nsString mId;
+protected:
+
+  // The document's security info
+  nsCOMPtr<nsISupports> mSecurityInfo;
+
+  // The channel that failed to load and resulted in an error page.
+  // This only applies to error pages. Might be null.
+  nsCOMPtr<nsIChannel> mFailedChannel;
+
+  // if this document is part of a multipart document,
+  // the ID can be used to distinguish it from the other parts.
+  uint32_t mPartID;
+
+  // Cycle collector generation in which we're certain that this document
+  // won't be collected
+  uint32_t mMarkedCCGeneration;
+
+  nsIPresShell* mPresShell;
+
+  nsCOMArray<nsINode> mSubtreeModifiedTargets;
+  uint32_t            mSubtreeModifiedDepth;
+
+  // If we're an external resource document, this will be non-null and will
+  // point to our "display document": the one that all resource lookups should
+  // go to.
+  nsCOMPtr<nsIDocument> mDisplayDocument;
+
+  uint32_t mEventsSuppressed;
+
+  uint32_t mAnimationsPaused;
+
+  /**
+   * The number number of external scripts (ones with the src attribute) that
+   * have this document as their owner and that are being evaluated right now.
+   */
+  uint32_t mExternalScriptsBeingEvaluated;
+
+  /**
+   * The current frame request callback handle
+   */
+  int32_t mFrameRequestCallbackCounter;
+
+  // Count of live static clones of this document.
+  uint32_t mStaticCloneCount;
+
+  // Array of nodes that have been blocked to prevent user tracking.
+  // They most likely have had their nsIChannel canceled by the URL
+  // classifier. (Safebrowsing)
+  //
+  // Weak nsINode pointers are used to allow nodes to disappear.
+  nsTArray<nsWeakPtr> mBlockedTrackingNodes;
+
+  // Weak reference to mScriptGlobalObject QI:d to nsPIDOMWindow,
+  // updated on every set of mScriptGlobalObject.
+  nsPIDOMWindowInner* mWindow;
+
+  nsCOMPtr<nsIDocumentEncoder> mCachedEncoder;
+
+  struct FrameRequest;
+
+  nsTArray<FrameRequest> mFrameRequestCallbacks;
+
+  // This object allows us to evict ourself from the back/forward cache.  The
+  // pointer is non-null iff we're currently in the bfcache.
+  nsIBFCacheEntry *mBFCacheEntry;
+
+  // Our base target.
+  nsString mBaseTarget;
+
+  nsCOMPtr<nsIStructuredCloneContainer> mStateObjectContainer;
+  nsCOMPtr<nsIVariant> mStateObjectCached;
+
+  uint32_t mInSyncOperationCount;
+
+  RefPtr<mozilla::dom::XPathEvaluator> mXPathEvaluator;
+
+  nsTArray<RefPtr<mozilla::dom::AnonymousContent>> mAnonymousContents;
+
+  uint32_t mBlockDOMContentLoaded;
+
+  // Our live MediaQueryLists
+  PRCList mDOMMediaQueryLists;
+
+  // Flags for use counters used directly by this document.
+  std::bitset<mozilla::eUseCounter_Count> mUseCounters;
+  // Flags for use counters used by any child documents of this document.
+  std::bitset<mozilla::eUseCounter_Count> mChildDocumentUseCounters;
+  // Flags for whether we've notified our top-level "page" of a use counter
+  // for this child document.
+  std::bitset<mozilla::eUseCounter_Count> mNotifiedPageForUseCounter;
+
+  // Whether the user has interacted with the document or not:
+  bool mUserHasInteracted;
+
+  mozilla::TimeStamp mPageUnloadingEventTimeStamp;
+
+  RefPtr<mozilla::dom::DocGroup> mDocGroup;
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(nsIDocument, NS_IDOCUMENT_IID)
+
+/**
+ * mozAutoSubtreeModified batches DOM mutations so that a DOMSubtreeModified
+ * event is dispatched, if necessary, when the outermost mozAutoSubtreeModified
+ * object is deleted.
+ */
+class MOZ_STACK_CLASS mozAutoSubtreeModified
+{
+public:
+  /**
+   * @param aSubTreeOwner The document in which a subtree will be modified.
+   * @param aTarget       The target of the possible DOMSubtreeModified event.
+   *                      Can be nullptr, in which case mozAutoSubtreeModified
+   *                      is just used to batch DOM mutations.
+   */
+  mozAutoSubtreeModified(nsIDocument* aSubtreeOwner, nsINode* aTarget)
+  {
+    UpdateTarget(aSubtreeOwner, aTarget);
+  }
+
+  ~mozAutoSubtreeModified()
+  {
+    UpdateTarget(nullptr, nullptr);
+  }
+
+  void UpdateTarget(nsIDocument* aSubtreeOwner, nsINode* aTarget)
+  {
+    if (mSubtreeOwner) {
+      mSubtreeOwner->MutationEventDispatched(mTarget);
+    }
+
+    mTarget = aTarget;
+    mSubtreeOwner = aSubtreeOwner;
+    if (mSubtreeOwner) {
+      mSubtreeOwner->WillDispatchMutationEvent(mTarget);
+    }
+  }
+
+private:
+  nsCOMPtr<nsINode>     mTarget;
+  nsCOMPtr<nsIDocument> mSubtreeOwner;
+};
+
+class MOZ_STACK_CLASS nsAutoSyncOperation
+{
+public:
+  explicit nsAutoSyncOperation(nsIDocument* aDocument);
+  ~nsAutoSyncOperation();
+private:
+  nsCOMArray<nsIDocument> mDocuments;
+  uint32_t                mMicroTaskLevel;
+};
+
+// XXX These belong somewhere else
+nsresult
+NS_NewHTMLDocument(nsIDocument** aInstancePtrResult, bool aLoadedAsData = false);
+
+nsresult
+NS_NewXMLDocument(nsIDocument** aInstancePtrResult, bool aLoadedAsData = false,
+                  bool aIsPlainDocument = false);
+
+nsresult
+NS_NewSVGDocument(nsIDocument** aInstancePtrResult);
+
+nsresult
+NS_NewImageDocument(nsIDocument** aInstancePtrResult);
+
+nsresult
+NS_NewVideoDocument(nsIDocument** aInstancePtrResult);
+
+// Note: it's the caller's responsibility to create or get aPrincipal as needed
+// -- this method will not attempt to get a principal based on aDocumentURI.
+// Also, both aDocumentURI and aBaseURI must not be null.
+nsresult
+NS_NewDOMDocument(nsIDOMDocument** aInstancePtrResult,
+                  const nsAString& aNamespaceURI,
+                  const nsAString& aQualifiedName,
+                  nsIDOMDocumentType* aDoctype,
+                  nsIURI* aDocumentURI,
+                  nsIURI* aBaseURI,
+                  nsIPrincipal* aPrincipal,
+                  bool aLoadedAsData,
+                  nsIGlobalObject* aEventObject,
+                  DocumentFlavor aFlavor);
+
+// This is used only for xbl documents created from the startup cache.
+// Non-cached documents are created in the same manner as xml documents.
+nsresult
+NS_NewXBLDocument(nsIDOMDocument** aInstancePtrResult,
+                  nsIURI* aDocumentURI,
+                  nsIURI* aBaseURI,
+                  nsIPrincipal* aPrincipal);
+
+nsresult
+NS_NewPluginDocument(nsIDocument** aInstancePtrResult);
+
+inline nsIDocument*
+nsINode::GetOwnerDocument() const
+{
+  nsIDocument* ownerDoc = OwnerDoc();
+
+  return ownerDoc != this ? ownerDoc : nullptr;
+}
+
+inline nsINode*
+nsINode::OwnerDocAsNode() const
+{
+  return OwnerDoc();
+}
+
+inline mozilla::dom::ParentObject
+nsINode::GetParentObject() const
+{
+  mozilla::dom::ParentObject p(OwnerDoc());
+    // Note that mUseXBLScope is a no-op for chrome, and other places where we
+    // don't use XBL scopes.
+  p.mUseXBLScope = IsInAnonymousSubtree() && !IsAnonymousContentInSVGUseSubtree();
+  return p;
+}
+
+#endif /* nsIDocument_h___ */