Smaller vtbls in RenderObject

Source/core/rendering/RenderFullScreen.h

 /*
  * Copyright (C) 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 17 matching lines @@
 #include "core/rendering/RenderFlexibleBox.h"
 #include "core/rendering/style/StyleInheritedData.h"
 
 namespace blink {
 
 class RenderFullScreen final : public RenderFlexibleBox {
 public:
     static RenderFullScreen* createAnonymous(Document*);
     virtual void trace(Visitor*) override;
 
-    virtual bool isRenderFullScreen() const override { return true; }
+    virtual bool isOfType(RenderObjectType type) const override { return type == RenderObjectRenderFullScreen || RenderFlexibleBox::isOfType(type); }
     virtual const char* renderName() const override { return "RenderFullScreen"; }
 
     void setPlaceholder(RenderBlock*);
     RenderBlock* placeholder() { return m_placeholder; }
     void createPlaceholder(PassRefPtr<RenderStyle>, const LayoutRect& frameRect);
 
 
     static RenderObject* wrapRenderer(RenderObject*, RenderObject*, Document*);
     void unwrapRenderer();
 
     void updateStyle();
 
 private:
     RenderFullScreen();
     virtual void willBeDestroyed() override;
 
 protected:
     RawPtrWillBeMember<RenderBlock> m_placeholder;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderFullScreen, isRenderFullScreen());
 
 }
 
 #endif