Remove MOZ_B2G leftovers and some dead B2G-only components.

5 files changed, 0 insertions, 967 deletions

diff --git a/dom/inputmethod/HardwareKeyHandler.cpp b/dom/inputmethod/HardwareKeyHandler.cpp
deleted file mode 100644
index 737c30e5b5..0000000000
--- a/dom/inputmethod/HardwareKeyHandler.cpp
+++ /dev/null
@@ -1,562 +0,0 @@
-/* -*- 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/. */
-
-#include "HardwareKeyHandler.h"
-#include "mozilla/BasicEvents.h"
-#include "mozilla/ClearOnShutdown.h"
-#include "mozilla/dom/KeyboardEvent.h"
-#include "mozilla/dom/TabParent.h"
-#include "mozilla/EventDispatcher.h"
-#include "mozilla/EventStateManager.h"
-#include "mozilla/TextEvents.h"
-#include "nsDeque.h"
-#include "nsFocusManager.h"
-#include "nsFrameLoader.h"
-#include "nsIContent.h"
-#include "nsIDOMHTMLDocument.h"
-#include "nsIDOMHTMLElement.h"
-#include "nsPIDOMWindow.h"
-#include "nsPresContext.h"
-#include "nsPresShell.h"
-
-namespace mozilla {
-
-using namespace dom;
-
-NS_IMPL_ISUPPORTS(HardwareKeyHandler, nsIHardwareKeyHandler)
-
-StaticRefPtr<HardwareKeyHandler> HardwareKeyHandler::sInstance;
-
-HardwareKeyHandler::HardwareKeyHandler()
-  : mInputMethodAppConnected(false)
-{
-}
-
-HardwareKeyHandler::~HardwareKeyHandler()
-{
-}
-
-NS_IMETHODIMP
-HardwareKeyHandler::OnInputMethodAppConnected()
-{
-  if (NS_WARN_IF(mInputMethodAppConnected)) {
-    return NS_ERROR_UNEXPECTED;
-  }
-
-  mInputMethodAppConnected = true;
-
-  return NS_OK;
-}
-
-NS_IMETHODIMP
-HardwareKeyHandler::OnInputMethodAppDisconnected()
-{
-  if (NS_WARN_IF(!mInputMethodAppConnected)) {
-    return NS_ERROR_UNEXPECTED;
-  }
-
-  mInputMethodAppConnected = false;
-  return NS_OK;
-}
-
-NS_IMETHODIMP
-HardwareKeyHandler::RegisterListener(nsIHardwareKeyEventListener* aListener)
-{
-  // Make sure the listener is not nullptr and there is no available
-  // hardwareKeyEventListener now
-  if (NS_WARN_IF(!aListener)) {
-    return NS_ERROR_NULL_POINTER;
-  }
-
-  if (NS_WARN_IF(mHardwareKeyEventListener)) {
-    return NS_ERROR_ALREADY_INITIALIZED;
-  }
-
-  mHardwareKeyEventListener = do_GetWeakReference(aListener);
-
-  if (NS_WARN_IF(!mHardwareKeyEventListener)) {
-    return NS_ERROR_NULL_POINTER;
-  }
-
-  return NS_OK;
-}
-
-NS_IMETHODIMP
-HardwareKeyHandler::UnregisterListener()
-{
-  // Clear the HardwareKeyEventListener
-  mHardwareKeyEventListener = nullptr;
-  return NS_OK;
-}
-
-bool
-HardwareKeyHandler::ForwardKeyToInputMethodApp(nsINode* aTarget,
-                                               WidgetKeyboardEvent* aEvent,
-                                               nsEventStatus* aEventStatus)
-{
-  MOZ_ASSERT(aTarget, "No target provided");
-  MOZ_ASSERT(aEvent, "No event provided");
-
-  // No need to forward hardware key event to IME
-  // if key's defaultPrevented is true
-  if (aEvent->mFlags.mDefaultPrevented) {
-    return false;
-  }
-
-  // No need to forward hardware key event to IME if IME is disabled
-  if (!mInputMethodAppConnected) {
-    return false;
-  }
-
-  // No need to forward hardware key event to IME
-  // if this key event is generated by IME itself(from nsITextInputProcessor)
-  if (aEvent->mIsSynthesizedByTIP) {
-    return false;
-  }
-
-  // No need to forward hardware key event to IME
-  // if the key event is handling or already handled
-  if (aEvent->mInputMethodAppState != WidgetKeyboardEvent::eNotHandled) {
-    return false;
-  }
-
-  // No need to forward hardware key event to IME
-  // if there is no nsIHardwareKeyEventListener in use
-  nsCOMPtr<nsIHardwareKeyEventListener>
-    keyHandler(do_QueryReferent(mHardwareKeyEventListener));
-  if (!keyHandler) {
-    return false;
-  }
-
-  // Set the flags to specify the keyboard event is in forwarding phase.
-  aEvent->mInputMethodAppState = WidgetKeyboardEvent::eHandling;
-
-  // For those keypress events coming after their heading keydown's reply
-  // already arrives, they should be dispatched directly instead of
-  // being stored into the event queue. Otherwise, without the heading keydown
-  // in the event queue, the stored keypress will never be withdrawn to be fired.
-  if (aEvent->mMessage == eKeyPress && mEventQueue.IsEmpty()) {
-    DispatchKeyPress(aTarget, *aEvent, *aEventStatus);
-    return true;
-  }
-
-  // Push the key event into queue for reuse when its reply arrives.
-  KeyboardInfo* copiedInfo =
-    new KeyboardInfo(aTarget,
-                     *aEvent,
-                     aEventStatus ? *aEventStatus : nsEventStatus_eIgnore);
-
-  // No need to forward hardware key event to IME if the event queue is full
-  if (!mEventQueue.Push(copiedInfo)) {
-    delete copiedInfo;
-    return false;
-  }
-
-  // We only forward keydown and keyup event to input-method-app
-  // because input-method-app will generate keypress by itself.
-  if (aEvent->mMessage == eKeyPress) {
-    return true;
-  }
-
-  // Create a keyboard event to pass into
-  // nsIHardwareKeyEventListener.onHardwareKey
-  nsCOMPtr<EventTarget> eventTarget = do_QueryInterface(aTarget);
-  nsPresContext* presContext = GetPresContext(aTarget);
-  RefPtr<KeyboardEvent> keyboardEvent =
-    NS_NewDOMKeyboardEvent(eventTarget, presContext, aEvent->AsKeyboardEvent());
-  // Duplicate the internal event data in the heap for the keyboardEvent,
-  // or the internal data from |aEvent| in the stack may be destroyed by others.
-  keyboardEvent->DuplicatePrivateData();
-
-  // Forward the created keyboard event to input-method-app
-  bool isSent = false;
-  keyHandler->OnHardwareKey(keyboardEvent, &isSent);
-
-  // Pop the pending key event if it can't be forwarded
-  if (!isSent) {
-    mEventQueue.RemoveFront();
-  }
-
-  return isSent;
-}
-
-NS_IMETHODIMP
-HardwareKeyHandler::OnHandledByInputMethodApp(const nsAString& aType,
-                                              uint16_t aDefaultPrevented)
-{
-  // We can not handle this reply because the pending events had been already
-  // removed from the forwarding queue before this reply arrives.
-  if (mEventQueue.IsEmpty()) {
-    return NS_OK;
-  }
-
-  RefPtr<KeyboardInfo> keyInfo = mEventQueue.PopFront();
-
-  // Only allow keydown and keyup to call this method
-  if (NS_WARN_IF(aType.EqualsLiteral("keydown") &&
-                 keyInfo->mEvent.mMessage != eKeyDown) ||
-      NS_WARN_IF(aType.EqualsLiteral("keyup") &&
-                 keyInfo->mEvent.mMessage != eKeyUp)) {
-    return NS_ERROR_INVALID_ARG;
-  }
-
-  // The value of defaultPrevented depends on whether or not
-  // the key is consumed by input-method-app
-  SetDefaultPrevented(keyInfo->mEvent, aDefaultPrevented);
-
-  // Set the flag to specify the reply phase
-  keyInfo->mEvent.mInputMethodAppState = WidgetKeyboardEvent::eHandled;
-
-  // Check whether the event is still valid to be fired
-  if (CanDispatchEvent(keyInfo->mTarget, keyInfo->mEvent)) {
-    // If the key's defaultPrevented is true, it means that the
-    // input-method-app has already consumed this key,
-    // so we can dispatch |mozbrowserafterkey*| directly if
-    // preference "dom.beforeAfterKeyboardEvent.enabled" is enabled.
-    if (keyInfo->mEvent.mFlags.mDefaultPrevented) {
-      DispatchAfterKeyEvent(keyInfo->mTarget, keyInfo->mEvent);
-    // Otherwise, it means that input-method-app doesn't handle this key,
-    // so we need to dispatch it to its current event target.
-    } else {
-      DispatchToTargetApp(keyInfo->mTarget,
-                          keyInfo->mEvent,
-                          keyInfo->mStatus);
-    }
-  }
-
-  // No need to do further processing if the event is not keydown
-  if (keyInfo->mEvent.mMessage != eKeyDown) {
-    return NS_OK;
-  }
-
-  // Update the latest keydown data:
-  //   Release the holding reference to the previous keydown's data and
-  //   add a reference count to the current keydown's data.
-  mLatestKeyDownInfo = keyInfo;
-
-  // Handle the pending keypress event once keydown's reply arrives:
-  // It may have many keypress events per keydown on some platforms,
-  // so we use loop to dispatch keypress events.
-  // (But Gonk dispatch only one keypress per keydown)
-  // However, if there is no keypress after this keydown,
-  // then those following keypress will be handled in
-  // ForwardKeyToInputMethodApp directly.
-  for (KeyboardInfo* keypressInfo;
-       !mEventQueue.IsEmpty() &&
-       (keypressInfo = mEventQueue.PeekFront()) &&
-       keypressInfo->mEvent.mMessage == eKeyPress;
-       mEventQueue.RemoveFront()) {
-    DispatchKeyPress(keypressInfo->mTarget,
-                     keypressInfo->mEvent,
-                     keypressInfo->mStatus);
-  }
-
-  return NS_OK;
-}
-
-bool
-HardwareKeyHandler::DispatchKeyPress(nsINode* aTarget,
-                                     WidgetKeyboardEvent& aEvent,
-                                     nsEventStatus& aStatus)
-{
-  MOZ_ASSERT(aTarget, "No target provided");
-  MOZ_ASSERT(aEvent.mMessage == eKeyPress, "Event is not keypress");
-
-  // No need to dispatch keypress to the event target
-  // if the keydown event is consumed by the input-method-app.
-  if (mLatestKeyDownInfo &&
-      mLatestKeyDownInfo->mEvent.mFlags.mDefaultPrevented) {
-    return false;
-  }
-
-  // No need to dispatch keypress to the event target
-  // if the previous keydown event is modifier key's
-  if (mLatestKeyDownInfo &&
-      mLatestKeyDownInfo->mEvent.IsModifierKeyEvent()) {
-    return false;
-  }
-
-  // No need to dispatch keypress to the event target
-  // if it's invalid to be dispatched
-  if (!CanDispatchEvent(aTarget, aEvent)) {
-    return false;
-  }
-
-  // Set the flag to specify the reply phase.
-  aEvent.mInputMethodAppState = WidgetKeyboardEvent::eHandled;
-
-  // Dispatch the pending keypress event
-  bool ret = DispatchToTargetApp(aTarget, aEvent, aStatus);
-
-  // Re-trigger EventStateManager::PostHandleKeyboardEvent for keypress
-  PostHandleKeyboardEvent(aTarget, aEvent, aStatus);
-
-  return ret;
-}
-
-void
-HardwareKeyHandler::DispatchAfterKeyEvent(nsINode* aTarget,
-                                          WidgetKeyboardEvent& aEvent)
-{
-  MOZ_ASSERT(aTarget, "No target provided");
-
-  if (!PresShell::BeforeAfterKeyboardEventEnabled() ||
-      aEvent.mMessage == eKeyPress) {
-    return;
-  }
-
-  nsCOMPtr<nsIPresShell> presShell = GetPresShell(aTarget);
-  if (NS_WARN_IF(presShell)) {
-    presShell->DispatchAfterKeyboardEvent(aTarget,
-                                          aEvent,
-                                          aEvent.mFlags.mDefaultPrevented);
-  }
-}
-
-bool
-HardwareKeyHandler::DispatchToTargetApp(nsINode* aTarget,
-                                        WidgetKeyboardEvent& aEvent,
-                                        nsEventStatus& aStatus)
-{
-  MOZ_ASSERT(aTarget, "No target provided");
-
-  // Get current focused element as the event target
-  nsCOMPtr<nsIContent> currentTarget = GetCurrentTarget();
-  if (NS_WARN_IF(!currentTarget)) {
-    return false;
-  }
-
-  // The event target should be set to the current focused element.
-  // However, it might have security issue if the event is dispatched to
-  // the unexpected application, and it might cause unexpected operation
-  // in the new app.
-  nsCOMPtr<nsPIDOMWindowOuter> originalRootWindow = GetRootWindow(aTarget);
-  nsCOMPtr<nsPIDOMWindowOuter> currentRootWindow = GetRootWindow(currentTarget);
-  if (currentRootWindow != originalRootWindow) {
-    NS_WARNING("The root window is changed during the event is dispatching");
-    return false;
-  }
-
-  // If the current focused element is still in the same app,
-  // then we can use it as the current target to dispatch event.
-  nsCOMPtr<nsIPresShell> presShell = GetPresShell(currentTarget);
-  if (!presShell) {
-    return false;
-  }
-
-  if (!presShell->CanDispatchEvent(&aEvent)) {
-    return false;
-  }
-
-  // In-process case: the event target is in the current process
-  if (!PresShell::IsTargetIframe(currentTarget)) {
-    DispatchToCurrentProcess(presShell, currentTarget, aEvent, aStatus);
-
-    if (presShell->CanDispatchEvent(&aEvent)) {
-      DispatchAfterKeyEvent(aTarget, aEvent);
-    }
-
-    return true;
-  }
-
-  // OOP case: the event target is in the child process
-  return DispatchToCrossProcess(aTarget, aEvent);
-
-  // After the oop target receives the event from TabChild::RecvRealKeyEvent
-  // and return the result through TabChild::SendDispatchAfterKeyboardEvent,
-  // the |mozbrowserafterkey*| will be fired from
-  // TabParent::RecvDispatchAfterKeyboardEvent, so we don't need to dispatch
-  // |mozbrowserafterkey*| by ourselves in this module.
-}
-
-void
-HardwareKeyHandler::DispatchToCurrentProcess(nsIPresShell* presShell,
-                                             nsIContent* aTarget,
-                                             WidgetKeyboardEvent& aEvent,
-                                             nsEventStatus& aStatus)
-{
-  EventDispatcher::Dispatch(aTarget, presShell->GetPresContext(),
-                            &aEvent, nullptr, &aStatus, nullptr);
-}
-
-bool
-HardwareKeyHandler::DispatchToCrossProcess(nsINode* aTarget,
-                                           WidgetKeyboardEvent& aEvent)
-{
-  nsCOMPtr<nsIFrameLoaderOwner> remoteLoaderOwner = do_QueryInterface(aTarget);
-  if (NS_WARN_IF(!remoteLoaderOwner)) {
-    return false;
-  }
-
-  RefPtr<nsFrameLoader> remoteFrameLoader =
-    remoteLoaderOwner->GetFrameLoader();
-  if (NS_WARN_IF(!remoteFrameLoader)) {
-    return false;
-  }
-
-  uint32_t eventMode;
-  remoteFrameLoader->GetEventMode(&eventMode);
-  if (eventMode == nsIFrameLoader::EVENT_MODE_DONT_FORWARD_TO_CHILD) {
-    return false;
-  }
-
-  PBrowserParent* remoteBrowser = remoteFrameLoader->GetRemoteBrowser();
-  TabParent* remote = static_cast<TabParent*>(remoteBrowser);
-  if (NS_WARN_IF(!remote)) {
-    return false;
-  }
-
-  return remote->SendRealKeyEvent(aEvent);
-}
-
-void
-HardwareKeyHandler::PostHandleKeyboardEvent(nsINode* aTarget,
-                                            WidgetKeyboardEvent& aEvent,
-                                            nsEventStatus& aStatus)
-{
-  MOZ_ASSERT(aTarget, "No target provided");
-
-  nsPresContext* presContext = GetPresContext(aTarget);
-
-  RefPtr<mozilla::EventStateManager> esm = presContext->EventStateManager();
-  bool dispatchedToChildProcess = PresShell::IsTargetIframe(aTarget);
-  esm->PostHandleKeyboardEvent(&aEvent, aStatus, dispatchedToChildProcess);
-}
-
-void
-HardwareKeyHandler::SetDefaultPrevented(WidgetKeyboardEvent& aEvent,
-                                        uint16_t aDefaultPrevented) {
-  if (aDefaultPrevented & DEFAULT_PREVENTED) {
-    aEvent.mFlags.mDefaultPrevented = true;
-  }
-
-  if (aDefaultPrevented & DEFAULT_PREVENTED_BY_CHROME) {
-    aEvent.mFlags.mDefaultPreventedByChrome = true;
-  }
-
-  if (aDefaultPrevented & DEFAULT_PREVENTED_BY_CONTENT) {
-    aEvent.mFlags.mDefaultPreventedByContent = true;
-  }
-}
-
-bool
-HardwareKeyHandler::CanDispatchEvent(nsINode* aTarget,
-                                     WidgetKeyboardEvent& aEvent)
-{
-  nsCOMPtr<nsIPresShell> presShell = GetPresShell(aTarget);
-  if (NS_WARN_IF(!presShell)) {
-    return false;
-  }
-  return presShell->CanDispatchEvent(&aEvent);
-}
-
-already_AddRefed<nsPIDOMWindowOuter>
-HardwareKeyHandler::GetRootWindow(nsINode* aNode)
-{
-  // Get nsIPresShell's pointer first
-  nsCOMPtr<nsIPresShell> presShell = GetPresShell(aNode);
-  if (NS_WARN_IF(!presShell)) {
-    return nullptr;
-  }
-  nsCOMPtr<nsPIDOMWindowOuter> rootWindow = presShell->GetRootWindow();
-  return rootWindow.forget();
-}
-
-already_AddRefed<nsIContent>
-HardwareKeyHandler::GetCurrentTarget()
-{
-  nsFocusManager* fm = nsFocusManager::GetFocusManager();
-  if (NS_WARN_IF(!fm)) {
-    return nullptr;
-  }
-
-  nsCOMPtr<mozIDOMWindowProxy> focusedWindow;
-  fm->GetFocusedWindow(getter_AddRefs(focusedWindow));
-  if (NS_WARN_IF(!focusedWindow)) {
-    return nullptr;
-  }
-
-  auto* ourWindow = nsPIDOMWindowOuter::From(focusedWindow);
-
-  nsCOMPtr<nsPIDOMWindowOuter> rootWindow = ourWindow->GetPrivateRoot();
-  if (NS_WARN_IF(!rootWindow)) {
-    return nullptr;
-  }
-
-  nsCOMPtr<nsPIDOMWindowOuter> focusedFrame;
-  nsCOMPtr<nsIContent> focusedContent =
-    fm->GetFocusedDescendant(rootWindow, true, getter_AddRefs(focusedFrame));
-
-  // If there is no focus, then we use document body instead
-  if (NS_WARN_IF(!focusedContent || !focusedContent->GetPrimaryFrame())) {
-    nsIDocument* document = ourWindow->GetExtantDoc();
-    if (NS_WARN_IF(!document)) {
-      return nullptr;
-    }
-
-    focusedContent = document->GetRootElement();
-
-    nsCOMPtr<nsIDOMHTMLDocument> htmlDocument = do_QueryInterface(document);
-    if (htmlDocument) {
-      nsCOMPtr<nsIDOMHTMLElement> body;
-      htmlDocument->GetBody(getter_AddRefs(body));
-      nsCOMPtr<nsIContent> bodyContent = do_QueryInterface(body);
-      if (bodyContent) {
-        focusedContent = bodyContent;
-      }
-    }
-  }
-
-  return focusedContent ? focusedContent.forget() : nullptr;
-}
-
-nsPresContext*
-HardwareKeyHandler::GetPresContext(nsINode* aNode)
-{
-  // Get nsIPresShell's pointer first
-  nsCOMPtr<nsIPresShell> presShell = GetPresShell(aNode);
-  if (NS_WARN_IF(!presShell)) {
-    return nullptr;
-  }
-
-  // then use nsIPresShell to get nsPresContext's pointer
-  return presShell->GetPresContext();
-}
-
-already_AddRefed<nsIPresShell>
-HardwareKeyHandler::GetPresShell(nsINode* aNode)
-{
-  nsIDocument* doc = aNode->OwnerDoc();
-  if (NS_WARN_IF(!doc)) {
-    return nullptr;
-  }
-
-  nsCOMPtr<nsIPresShell> presShell = doc->GetShell();
-  if (NS_WARN_IF(!presShell)) {
-    return nullptr;
-  }
-
-  return presShell.forget();
-}
-
-/* static */
-already_AddRefed<HardwareKeyHandler>
-HardwareKeyHandler::GetInstance()
-{
-  if (!XRE_IsParentProcess()) {
-    return nullptr;
-  }
-
-  if (!sInstance) {
-    sInstance = new HardwareKeyHandler();
-    ClearOnShutdown(&sInstance);
-  }
-
-  RefPtr<HardwareKeyHandler> service = sInstance.get();
-  return service.forget();
-}
-
-} // namespace mozilla
diff --git a/dom/inputmethod/HardwareKeyHandler.h b/dom/inputmethod/HardwareKeyHandler.h
deleted file mode 100644
index 7520c40cd6..0000000000
--- a/dom/inputmethod/HardwareKeyHandler.h
+++ /dev/null
@@ -1,224 +0,0 @@
-/* -*- 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 mozilla_HardwareKeyHandler_h_
-#define mozilla_HardwareKeyHandler_h_
-
-#include "mozilla/EventForwards.h"          // for nsEventStatus
-#include "mozilla/StaticPtr.h"
-#include "mozilla/TextEvents.h"
-#include "nsCOMPtr.h"
-#include "nsDeque.h"
-#include "nsIHardwareKeyHandler.h"
-#include "nsIWeakReferenceUtils.h"          // for nsWeakPtr
-
-class nsIContent;
-class nsINode;
-class nsIPresShell;
-class nsPIDOMWindowOuter;
-class nsPresContext;
-
-namespace mozilla {
-
-// This module will copy the events' data into its event queue for reuse
-// after receiving input-method-app's reply, so we use the following struct
-// for storing these information.
-// RefCounted<T> is a helper class for adding reference counting mechanism.
-struct KeyboardInfo : public RefCounted<KeyboardInfo>
-{
-  MOZ_DECLARE_REFCOUNTED_TYPENAME(KeyboardInfo)
-
-  nsINode* mTarget;
-  WidgetKeyboardEvent mEvent;
-  nsEventStatus mStatus;
-
-  KeyboardInfo(nsINode* aTarget,
-               WidgetKeyboardEvent& aEvent,
-               nsEventStatus aStatus)
-    : mTarget(aTarget)
-    , mEvent(aEvent)
-    , mStatus(aStatus)
-  {
-  }
-};
-
-// The following is the type-safe wrapper around nsDeque
-// for storing events' data.
-// The T must be one class that supports reference counting mechanism.
-// The EventQueueDeallocator will be called in nsDeque::~nsDeque() or
-// nsDeque::Erase() to deallocate the objects. nsDeque::Erase() will remove
-// and delete all items in the queue. See more from nsDeque.h.
-template <class T>
-class EventQueueDeallocator : public nsDequeFunctor
-{
-  virtual void* operator() (void* aObject)
-  {
-    RefPtr<T> releaseMe = dont_AddRef(static_cast<T*>(aObject));
-    return nullptr;
-  }
-};
-
-// The type-safe queue to be used to store the KeyboardInfo data
-template <class T>
-class EventQueue : private nsDeque
-{
-public:
-  EventQueue()
-    : nsDeque(new EventQueueDeallocator<T>())
-  {
-  };
-
-  ~EventQueue()
-  {
-    Clear();
-  }
-
-  inline size_t GetSize()
-  {
-    return nsDeque::GetSize();
-  }
-
-  bool IsEmpty()
-  {
-    return !nsDeque::GetSize();
-  }
-
-  inline bool Push(T* aItem)
-  {
-    MOZ_ASSERT(aItem);
-    NS_ADDREF(aItem);
-    size_t sizeBefore = GetSize();
-    nsDeque::Push(aItem);
-    if (GetSize() != sizeBefore + 1) {
-      NS_RELEASE(aItem);
-      return false;
-    }
-    return true;
-  }
-
-  inline already_AddRefed<T> PopFront()
-  {
-    RefPtr<T> rv = dont_AddRef(static_cast<T*>(nsDeque::PopFront()));
-    return rv.forget();
-  }
-
-  inline void RemoveFront()
-  {
-    RefPtr<T> releaseMe = PopFront();
-  }
-
-  inline T* PeekFront()
-  {
-    return static_cast<T*>(nsDeque::PeekFront());
-  }
-
-  void Clear()
-  {
-    while (GetSize() > 0) {
-      RemoveFront();
-    }
-  }
-};
-
-class HardwareKeyHandler : public nsIHardwareKeyHandler
-{
-public:
-  HardwareKeyHandler();
-
-  NS_DECL_ISUPPORTS
-  NS_DECL_NSIHARDWAREKEYHANDLER
-
-  static already_AddRefed<HardwareKeyHandler> GetInstance();
-
-  virtual bool ForwardKeyToInputMethodApp(nsINode* aTarget,
-                                          WidgetKeyboardEvent* aEvent,
-                                          nsEventStatus* aEventStatus) override;
-
-private:
-  virtual ~HardwareKeyHandler();
-
-  // Return true if the keypress is successfully dispatched.
-  // Otherwise, return false.
-  bool DispatchKeyPress(nsINode* aTarget,
-                        WidgetKeyboardEvent& aEvent,
-                        nsEventStatus& aStatus);
-
-  void DispatchAfterKeyEvent(nsINode* aTarget, WidgetKeyboardEvent& aEvent);
-
-  void DispatchToCurrentProcess(nsIPresShell* aPresShell,
-                                nsIContent* aTarget,
-                                WidgetKeyboardEvent& aEvent,
-                                nsEventStatus& aStatus);
-
-  bool DispatchToCrossProcess(nsINode* aTarget, WidgetKeyboardEvent& aEvent);
-
-  // This method will dispatch not only key* event to its event target,
-  // no mather it's in the current process or in its child process,
-  // but also mozbrowserafterkey* to the corresponding target if it needs.
-  // Return true if the key is successfully dispatched.
-  // Otherwise, return false.
-  bool DispatchToTargetApp(nsINode* aTarget,
-                           WidgetKeyboardEvent& aEvent,
-                           nsEventStatus& aStatus);
-
-  // This method will be called after dispatching keypress to its target,
-  // if the input-method-app doesn't handle the key.
-  // In normal dispatching path, EventStateManager::PostHandleKeyboardEvent
-  // will be called when event is keypress.
-  // However, the ::PostHandleKeyboardEvent mentioned above will be aborted
-  // when we try to forward key event to the input-method-app.
-  // If the input-method-app consumes the key, then we don't need to do anything
-  // because the input-method-app will generate a new key event by itself.
-  // On the other hand, if the input-method-app doesn't consume the key,
-  // then we need to dispatch the key event by ourselves
-  // and call ::PostHandleKeyboardEvent again after the event is forwarded.
-  // Note that the EventStateManager::PreHandleEvent is already called before
-  // forwarding, so we don't need to call it in this module.
-  void PostHandleKeyboardEvent(nsINode* aTarget,
-                               WidgetKeyboardEvent& aEvent,
-                               nsEventStatus& aStatus);
-
-  void SetDefaultPrevented(WidgetKeyboardEvent& aEvent,
-                           uint16_t aDefaultPrevented);
-
-  // Check whether the event is valid to be fired.
-  // This method should be called every time before dispatching next event.
-  bool CanDispatchEvent(nsINode* aTarget,
-                        WidgetKeyboardEvent& aEvent);
-
-  already_AddRefed<nsPIDOMWindowOuter> GetRootWindow(nsINode* aNode);
-
-  already_AddRefed<nsIContent> GetCurrentTarget();
-
-  nsPresContext* GetPresContext(nsINode* aNode);
-
-  already_AddRefed<nsIPresShell> GetPresShell(nsINode* aNode);
-
-  static StaticRefPtr<HardwareKeyHandler> sInstance;
-
-  // The event queue is used to store the forwarded keyboard events.
-  // Those stored events will be dispatched if input-method-app doesn't
-  // consume them.
-  EventQueue<KeyboardInfo> mEventQueue;
-
-  // Hold the pointer to the latest keydown's data
-  RefPtr<KeyboardInfo> mLatestKeyDownInfo;
-
-  // input-method-app needs to register a listener by
-  // |nsIHardwareKeyHandler.registerListener| to receive
-  // the hardware keyboard event, and |nsIHardwareKeyHandler.registerListener|
-  // will set an nsIHardwareKeyEventListener to mHardwareKeyEventListener.
-  // Then, mHardwareKeyEventListener is used to forward the event
-  // to the input-method-app.
-  nsWeakPtr mHardwareKeyEventListener;
-
-  // To keep tracking the input-method-app is active or disabled.
-  bool mInputMethodAppConnected;
-};
-
-} // namespace mozilla
-
-#endif // #ifndef mozilla_HardwareKeyHandler_h_
diff --git a/dom/inputmethod/Keyboard.jsm b/dom/inputmethod/Keyboard.jsm
index 22f87ffbcf..51506c41fa 100644
--- a/dom/inputmethod/Keyboard.jsm
+++ b/dom/inputmethod/Keyboard.jsm
@@ -24,12 +24,7 @@ XPCOMUtils.defineLazyGetter(this, "appsService", function() {
 });
 
 XPCOMUtils.defineLazyGetter(this, "hardwareKeyHandler", function() {
-#ifdef MOZ_B2G
-  return Cc["@mozilla.org/HardwareKeyHandler;1"]
-         .getService(Ci.nsIHardwareKeyHandler);
-#else
   return null;
-#endif
 });
 
 var Utils = {
@@ -50,17 +45,6 @@ var Utils = {
 };
 
 this.Keyboard = {
-#ifdef MOZ_B2G
-  // For receving keyboard event fired from hardware before it's dispatched,
-  // |this| object is used to be the listener to get the forwarded event.
-  // As the listener, |this| object must implement nsIHardwareKeyEventListener
-  // and nsSupportsWeakReference.
-  // Please see nsIHardwareKeyHandler.idl to get more information.
-  QueryInterface: XPCOMUtils.generateQI([
-    Ci.nsIHardwareKeyEventListener,
-    Ci.nsISupportsWeakReference
-  ]),
-#endif
   _isConnectedToHardwareKeyHandler: false,
   _formMM: null,      // The current web page message manager.
   _keyboardMM: null,  // The keyboard app message manager.
diff --git a/dom/inputmethod/moz.build b/dom/inputmethod/moz.build
index 504e2ebfc2..84b3cb8ab2 100644
--- a/dom/inputmethod/moz.build
+++ b/dom/inputmethod/moz.build
@@ -4,29 +4,6 @@
 # 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/.
 
-if CONFIG['MOZ_B2G']:
-    XPIDL_SOURCES += [
-        'nsIHardwareKeyHandler.idl',
-    ]
-
-    XPIDL_MODULE = 'inputmethod'
-
-    EXPORTS.mozilla += [
-        'HardwareKeyHandler.h',
-    ]
-
-    SOURCES += [
-        'HardwareKeyHandler.cpp'
-    ]
-
-    include('/ipc/chromium/chromium-config.mozbuild')
-
-    FINAL_LIBRARY = 'xul'
-    LOCAL_INCLUDES += [
-        '/dom/base',
-        '/layout/base',
-    ]
-
 EXTRA_COMPONENTS += [
     'InputMethod.manifest',
     'MozKeyboard.js',
diff --git a/dom/inputmethod/nsIHardwareKeyHandler.idl b/dom/inputmethod/nsIHardwareKeyHandler.idl
deleted file mode 100644
index 5bce4d9805..0000000000
--- a/dom/inputmethod/nsIHardwareKeyHandler.idl
+++ /dev/null
@@ -1,142 +0,0 @@
-/* -*- 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/. */
-
-#include "nsISupports.idl"
-
-interface nsIDOMKeyEvent;
-
-%{C++
-#define NS_HARDWARE_KEY_HANDLER_CID \
-  { 0xfb45921b, 0xe0a5, 0x45c6, \
-    { 0x90, 0xd0, 0xa6, 0x97, 0xa7, 0x72, 0xc4, 0x2a } }
-#define NS_HARDWARE_KEY_HANDLER_CONTRACTID \
-  "@mozilla.org/HardwareKeyHandler;1"
-
-#include "mozilla/EventForwards.h" /* For nsEventStatus */
-
-namespace mozilla {
-class WidgetKeyboardEvent;
-}
-
-using mozilla::WidgetKeyboardEvent;
-
-class nsINode;
-%}
-
-/**
- * This interface is used to be registered to the nsIHardwareKeyHandler through
- * |nsIHardwareKeyHandler.registerListener|.
- */
-[scriptable, function, uuid(cd5aeee3-b4b9-459d-85e7-c0671c7a8a2e)]
-interface nsIHardwareKeyEventListener : nsISupports
-{
-  /**
-   * This method will be invoked by nsIHardwareKeyHandler to forward the native
-   * keyboard event to the active input method
-   */
-  bool onHardwareKey(in nsIDOMKeyEvent aEvent);
-};
-
-/**
- * This interface has two main roles. One is to send a hardware keyboard event
- * to the active input method app and the other is to receive its reply result.
- * If a keyboard event is triggered from a hardware keyboard when an editor has
- * focus, the event target should be the editor. However, the text input
- * processor algorithm is implemented in an input method app and it should
- * handle the event earlier than the real event target to do the mapping such
- * as character conversion according to the language setting or the type of a
- * hardware keyboard.
- */
-[scriptable, builtinclass, uuid(25b34270-caad-4d18-a910-860351690639)]
-interface nsIHardwareKeyHandler : nsISupports
-{
-  /**
-   * Flags used to set the defaultPrevented's result. The default result
-   * from input-method-app should be set to NO_DEFAULT_PREVENTED.
-   * (It means the forwarded event isn't consumed by input-method-app.)
-   * If the input-method-app consumes the forwarded event,
-   * then the result should be set by DEFAULT_PREVENTED* before reply.
-   */
-  const unsigned short NO_DEFAULT_PREVENTED           = 0x0000;
-  const unsigned short DEFAULT_PREVENTED              = 0x0001;
-  const unsigned short DEFAULT_PREVENTED_BY_CHROME    = 0x0002;
-  const unsigned short DEFAULT_PREVENTED_BY_CONTENT   = 0x0004;
-
-  /**
-   * Registers a listener in input-method-app to receive
-   * the forwarded hardware keyboard events
-   *
-   * @param aListener             Listener object to be notified for receiving
-   *                              the keyboard event fired from hardware
-   * @note                        A listener object must implement
-   *                              nsIHardwareKeyEventListener and
-   *                              nsSupportsWeakReference
-   * @see nsIHardwareKeyEventListener
-   * @see nsSupportsWeakReference
-   */
-  void registerListener(in nsIHardwareKeyEventListener aListener);
-
-  /**
-   * Unregisters the current listener from input-method-app
-   */
-  void unregisterListener();
-
-  /**
-   * Notifies nsIHardwareKeyHandler that input-method-app is active.
-   */
-  void onInputMethodAppConnected();
-
-  /**
-   * Notifies nsIHardwareKeyHandler that input-method-app is disabled.
-   */
-  void onInputMethodAppDisconnected();
-
-  /**
-   * Input-method-app will pass the processing result that the forwarded
-   * event is handled or not through this method, and the nsIHardwareKeyHandler
-   * can use this to receive the reply of |forwardKeyToInputMethodApp|
-   * from the active input method.
-   *
-   * The result should contain the original event type and the info whether
-   * the default is prevented, also, it is prevented by chrome or content.
-   *
-   * @param aEventType            The type of an original event.
-   * @param aDefaultPrevented     State that |evt.preventDefault|
-   *                              is called by content, chrome or not.
-   */
-  void onHandledByInputMethodApp(in DOMString aType,
-                                 in unsigned short aDefaultPrevented);
-
-  /**
-   * Sends the native keyboard events triggered from hardware to the
-   * active input method before dispatching to its event target.
-   * This method only forwards keydown and keyup events.
-   * If the event isn't allowed to be forwarded, we should continue the
-   * normal event processing. For those forwarded keydown and keyup events
-   * We will pause the further event processing to wait for the completion
-   * of the event handling in the active input method app.
-   * Once |onHandledByInputMethodApp| is called by the input method app,
-   * the pending event processing can be resumed according to its reply.
-   * On the other hand, the keypress will never be sent to the input-method-app.
-   * Depending on whether the keydown's reply arrives before the keypress event
-   * comes, the keypress event will be handled directly or pushed into
-   * the event queue to wait for its heading keydown's reply.
-   *
-   * This implementation will call |nsIHardwareKeyEventListener.onHardwareKey|,
-   * which is registered through |nsIHardwareKeyEventListener.registerListener|,
-   * to forward the events.
-   *
-   * Returns true, if the event is handled in this module.
-   * Returns false, otherwise.
-   *
-   * If it returns false, we should continue the normal event processing.
-   */
-  %{C++
-  virtual bool ForwardKeyToInputMethodApp(nsINode* aTarget,
-                                          WidgetKeyboardEvent* aEvent,
-                                          nsEventStatus* aEventStatus) = 0;
-  %}
-};