Apply FINAL to the RenderObject hierarchy.

Source/core/rendering/RenderSlider.h

 /*
  * Copyright (C) 2006, 2007, 2008, 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 11 matching lines @@
 #define RenderSlider_h
 
 #include "RenderFlexibleBox.h"
 
 namespace WebCore {
 
 class HTMLInputElement;
 class MouseEvent;
 class SliderThumbElement;
 
-class RenderSlider : public RenderFlexibleBox {
+class RenderSlider FINAL : public RenderFlexibleBox {
 public:
     static const int defaultTrackLength;
 
     explicit RenderSlider(HTMLInputElement*);
     virtual ~RenderSlider();
 
     bool inDragMode() const;
 
 private:
     virtual const char* renderName() const { return "RenderSlider"; }
@@ skipping 12 matching lines @@
     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isSlider());
     return static_cast<RenderSlider*>(object);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toRenderSlider(const RenderSlider*);
 
 } // namespace WebCore
 
 #endif // RenderSlider_h