Bug 1446601: Devirtualize nsIDocument::Get/SetFailedChannel. r=bz

Summary: The member is already in nsIDocument anyway.

Reviewers: bzbarsky

Bug #: 1446601

Differential Revision: https://phabricator.services.mozilla.com/D751

MozReview-Commit-ID: 90Ad5wiCeMS

dom/base/nsDocument.h

@@ -166,13 +166,6 @@ public:
   static bool IsWebAnimationsEnabled(JSContext* aCx, JSObject* aObject);
   static bool IsWebAnimationsEnabled(mozilla::dom::CallerType aCallerType);
 
-  virtual nsIChannel* GetFailedChannel() const override {
-    return mFailedChannel;
-  }
-  virtual void SetFailedChannel(nsIChannel* aChannel) override {
-    mFailedChannel = aChannel;
-  }
-
   virtual void EndUpdate(nsUpdateType aUpdateType) override;
   virtual void BeginLoad() override;
   virtual void EndLoad() override;

dom/base/nsIDocument.h

@@ -2263,13 +2263,19 @@ public:
    * 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;
+  nsIChannel* GetFailedChannel() const
+  {
+    return mFailedChannel;
+  }
 
   /**
    * 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;
+  void SetFailedChannel(nsIChannel* aChannel)
+  {
+    mFailedChannel = aChannel;
+  }
 
   /**
    * Returns the default namespace ID used for elements created in this