2 files changed, 7 insertions, 19 deletions
diff --git a/dom/base/CustomElementRegistry.cpp b/dom/base/CustomElementRegistry.cpp
index 7fd295201d..fc6ac28772 100644
--- a/dom/base/CustomElementRegistry.cpp
+++ b/dom/base/CustomElementRegistry.cpp
@@ -442,8 +442,7 @@ CustomElementRegistry::EnqueueLifecycleCallback(nsIDocument::ElementCallbackType
 
   CustomElementReactionsStack* reactionsStack =
     docGroup->CustomElementReactionsStack();
-  reactionsStack->EnqueueCallbackReaction(aCustomElement, definition,
-                                          Move(callback));
+  reactionsStack->EnqueueCallbackReaction(aCustomElement, Move(callback));
 }
 
 void
@@ -1025,11 +1024,9 @@ CustomElementReactionsStack::EnqueueUpgradeReaction(Element* aElement,
 
 void
 CustomElementReactionsStack::EnqueueCallbackReaction(Element* aElement,
-                                                     CustomElementDefinition* aDefinition,
                                                      UniquePtr<CustomElementCallback> aCustomElementCallback)
 {
-  Enqueue(aElement, new CustomElementCallbackReaction(aDefinition,
-                                                      Move(aCustomElementCallback)));
+  Enqueue(aElement, new CustomElementCallbackReaction(Move(aCustomElementCallback)));
 }
 
 void
diff --git a/dom/base/CustomElementRegistry.h b/dom/base/CustomElementRegistry.h
index e9b2bee56b..674c653ab7 100644
--- a/dom/base/CustomElementRegistry.h
+++ b/dom/base/CustomElementRegistry.h
@@ -212,40 +212,32 @@ private:
 class CustomElementReaction
 {
 public:
-  explicit CustomElementReaction(CustomElementDefinition* aDefinition)
-    : mDefinition(aDefinition)
-  {
-  }
-
   virtual ~CustomElementReaction() = default;
   virtual void Invoke(Element* aElement, ErrorResult& aRv) = 0;
   virtual void Traverse(nsCycleCollectionTraversalCallback& aCb) const
   {
   }
-
-protected:
-  CustomElementDefinition* mDefinition;
 };
 
 class CustomElementUpgradeReaction final : public CustomElementReaction
 {
 public:
   explicit CustomElementUpgradeReaction(CustomElementDefinition* aDefinition)
-    : CustomElementReaction(aDefinition)
+    : mDefinition(aDefinition)
   {
   }
 
 private:
    virtual void Invoke(Element* aElement, ErrorResult& aRv) override;
+
+   CustomElementDefinition* mDefinition;
 };
 
 class CustomElementCallbackReaction final : public CustomElementReaction
 {
   public:
-    CustomElementCallbackReaction(CustomElementDefinition* aDefinition,
-                                  UniquePtr<CustomElementCallback> aCustomElementCallback)
-      : CustomElementReaction(aDefinition)
-      , mCustomElementCallback(Move(aCustomElementCallback))
+    explicit CustomElementCallbackReaction(UniquePtr<CustomElementCallback> aCustomElementCallback)
+      : mCustomElementCallback(Move(aCustomElementCallback))
     {
     }
 
@@ -289,7 +281,6 @@ public:
    * https://html.spec.whatwg.org/multipage/scripting.html#enqueue-a-custom-element-callback-reaction
    */
   void EnqueueCallbackReaction(Element* aElement,
-                               CustomElementDefinition* aDefinition,
                                UniquePtr<CustomElementCallback> aCustomElementCallback);
 
   // [CEReactions] Before executing the algorithm's steps