Apply FINAL to the RenderObject hierarchy.

Source/core/rendering/RenderHTMLCanvas.h

 /*
  * Copyright (C) 2004, 2006, 2007, 2009 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 14 matching lines @@
 
 #ifndef RenderHTMLCanvas_h
 #define RenderHTMLCanvas_h
 
 #include "RenderReplaced.h"
 
 namespace WebCore {
 
 class HTMLCanvasElement;
 
-class RenderHTMLCanvas : public RenderReplaced {
+class RenderHTMLCanvas FINAL : public RenderReplaced {
 public:
     explicit RenderHTMLCanvas(HTMLCanvasElement*);
 
     virtual bool isCanvas() const { return true; }
     virtual bool requiresLayer() const;
 
     void canvasSizeChanged();
     
 private:
     virtual const char* renderName() const { return "RenderHTMLCanvas"; }
     virtual void paintReplaced(PaintInfo&, const LayoutPoint&);
     virtual void intrinsicSizeChanged() { canvasSizeChanged(); }
 };
 
 inline RenderHTMLCanvas* toRenderHTMLCanvas(RenderObject* object)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isCanvas());
     return static_cast<RenderHTMLCanvas*>(object);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toRenderHTMLCanvas(const RenderHTMLCanvas*);
 
 } // namespace WebCore
 
 #endif // RenderHTMLCanvas_h