Apply FINAL to the RenderObject hierarchy.

Source/core/rendering/RenderListMarker.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 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 15 matching lines @@
 #include "RenderBox.h"
 
 namespace WebCore {
 
 class RenderListItem;
 
 String listMarkerText(EListStyleType, int value);
 
 // Used to render the list item's marker.
 // The RenderListMarker always has to be a child of a RenderListItem.
-class RenderListMarker : public RenderBox {
+class RenderListMarker FINAL : public RenderBox {
 public:
     static RenderListMarker* createAnonymous(RenderListItem*);
 
     virtual ~RenderListMarker();
 
     const String& text() const { return m_text; }
     String suffix() const;
 
     bool isInside() const;
 
@@ skipping 52 matching lines @@
     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isListMarker());
     return static_cast<const RenderListMarker*>(object);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toRenderListMarker(const RenderListMarker*);
 
 } // namespace WebCore
 
 #endif // RenderListMarker_h