Apply FINAL to the RenderObject hierarchy.

Source/core/rendering/RenderScrollbarPart.h

 /*
  * Copyright (C) 2008 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 15 matching lines @@
 #ifndef RenderScrollbarPart_h
 #define RenderScrollbarPart_h
 
 #include "RenderBlock.h"
 #include "ScrollTypes.h"
 
 namespace WebCore {
 
 class RenderScrollbar;
 
-class RenderScrollbarPart : public RenderBlock {
+class RenderScrollbarPart FINAL : public RenderBlock {
 public:
     static RenderScrollbarPart* createAnonymous(Document*, RenderScrollbar* = 0, ScrollbarPart = NoPart);
     
     virtual ~RenderScrollbarPart();
 
     virtual const char* renderName() const { return "RenderScrollbarPart"; }
     
     virtual bool requiresLayer() const { return false; }
 
     virtual void layout();
@@ skipping 40 matching lines @@
     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isRenderScrollbarPart());
     return static_cast<const RenderScrollbarPart*>(object);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toRenderScrollbarPart(const RenderScrollbarPart*);
 
 } // namespace WebCore
 
 #endif // RenderScrollbarPart_h