Apply FINAL to the RenderObject hierarchy.

Source/core/rendering/RenderListItem.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 11 matching lines @@
 
 #ifndef RenderListItem_h
 #define RenderListItem_h
 
 #include "RenderBlock.h"
 
 namespace WebCore {
 
 class RenderListMarker;
 
+// FIXME: make FINAL once MemoryInstrumentation does not use inheritance.
 class RenderListItem : public RenderBlock {
 public:
     explicit RenderListItem(Element*);
 
     int value() const { if (!m_isValueUpToDate) updateValueNow(); return m_value; }
     void updateValue();
 
     bool hasExplicitValue() const { return m_hasExplicitValue; }
     int explicitValue() const { return m_explicitValue; }
     void setExplicitValue(int value);
@@ skipping 51 matching lines @@
     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isListItem());
     return static_cast<RenderListItem*>(object);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toRenderListItem(const RenderListItem*);
 
 } // namespace WebCore
 
 #endif // RenderListItem_h