Apply FINAL to the RenderObject hierarchy.

Source/core/rendering/RenderFieldset.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2006, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 10 matching lines @@
  *
  */
 
 #ifndef RenderFieldset_h
 #define RenderFieldset_h
 
 #include "RenderBlock.h"
 
 namespace WebCore {
 
-class RenderFieldset : public RenderBlock {
+class RenderFieldset FINAL : public RenderBlock {
 public:
     explicit RenderFieldset(Element*);
 
     enum FindLegendOption { IgnoreFloatingOrOutOfFlow, IncludeFloatingOrOutOfFlow };
     RenderBox* findLegend(FindLegendOption = IgnoreFloatingOrOutOfFlow) const;
 
 private:
     virtual const char* renderName() const { return "RenderFieldSet"; }
     virtual bool isFieldset() const { return true; }
 
@@ skipping 11 matching lines @@
     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isFieldset());
     return static_cast<RenderFieldset*>(object);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toRenderFieldset(const RenderFieldset*);
 
 } // namespace WebCore
 
 #endif // RenderFieldset_h