Apply FINAL to the RenderObject hierarchy.

Source/core/rendering/RenderTableCell.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, 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
@@ skipping 17 matching lines @@
 #include "RenderTableRow.h"
 #include "RenderTableSection.h"
 
 namespace WebCore {
 
 static const unsigned unsetColumnIndex = 0x1FFFFFFF;
 static const unsigned maxColumnIndex = 0x1FFFFFFE; // 536,870,910
 
 enum IncludeBorderColorOrNot { DoNotIncludeBorderColor, IncludeBorderColor };
 
+// FIXME: make FINAL once MemoryInstrumentation does not use inheritance.
 class RenderTableCell : public RenderBlock {
 public:
     explicit RenderTableCell(Element*);
     
     unsigned colSpan() const
     {
         if (!m_hasColSpan)
             return 1;
         return parseColSpanFromDOM();
     }
@@ skipping 243 matching lines @@
     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isTableCell());
     return static_cast<const RenderTableCell*>(object);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toRenderTableCell(const RenderTableCell*);
 
 } // namespace WebCore
 
 #endif // RenderTableCell_h