Apply FINAL to the RenderObject hierarchy.

Source/core/rendering/RenderTableRow.h

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 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
@@ skipping 14 matching lines @@
 #ifndef RenderTableRow_h
 #define RenderTableRow_h
 
 #include "RenderTableSection.h"
 
 namespace WebCore {
 
 static const unsigned unsetRowIndex = 0x7FFFFFFF;
 static const unsigned maxRowIndex = 0x7FFFFFFE; // 2,147,483,646
 
+// FIXME: make FINAL once MemoryInstrumentation does not use inheritance.
 class RenderTableRow : public RenderBox {
 public:
     explicit RenderTableRow(Element*);
 
     RenderObject* firstChild() const { ASSERT(children() == virtualChildren()); return children()->firstChild(); }
     RenderObject* lastChild() const { ASSERT(children() == virtualChildren()); return children()->lastChild(); }
 
     const RenderObjectChildList* children() const { return &m_children; }
     RenderObjectChildList* children() { return &m_children; }
 
@@ skipping 83 matching lines @@
     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isTableRow());
     return static_cast<const RenderTableRow*>(object);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toRenderTableRow(const RenderTableRow*);
 
 } // namespace WebCore
 
 #endif // RenderTableRow_h