Bug 1444580: Devirtualize GetCurrentContentSink. r=smaug

Another easy one.

MozReview-Commit-ID: DJnTRYTiHwH

dom/base/nsDocument.cpp

@@ -9273,7 +9273,7 @@ nsDocument::UnsuppressEventHandlingAndFireEvents(bool aFireEvents)
 }
 
 nsISupports*
-nsDocument::GetCurrentContentSink()
+nsIDocument::GetCurrentContentSink()
 {
   return mParser ? mParser->GetContentSink() : nullptr;
 }

dom/base/nsDocument.h

@@ -586,8 +586,6 @@ public:
   virtual void MaybePreconnect(nsIURI* uri,
                                mozilla::CORSMode aCORSMode) override;
 
-  virtual nsISupports* GetCurrentContentSink() override;
-
   // Only BlockOnload should call this!
   void AsyncBlockOnload();
 

dom/base/nsIDocument.h

@@ -2764,7 +2764,7 @@ public:
     return mDocumentState;
   }
 
-  virtual nsISupports* GetCurrentContentSink() = 0;
+  nsISupports* GetCurrentContentSink();
 
   void SetAutoFocusElement(Element* aAutoFocusElement);
   void TriggerAutoFocus();