Apply FINAL to the RenderObject hierarchy.

Source/core/rendering/RenderListBox.h

 /*
  * This file is part of the select element renderer in WebCore.
  *
  * Copyright (C) 2006, 2007, 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 20 matching lines @@
 #ifndef RenderListBox_h
 #define RenderListBox_h
 
 #include "RenderBlock.h"
 #include "ScrollableArea.h"
 
 namespace WebCore {
 
 class HTMLSelectElement;
 
-class RenderListBox : public RenderBlock, private ScrollableArea {
+class RenderListBox FINAL : public RenderBlock, private ScrollableArea {
 public:
     explicit RenderListBox(Element*);
     virtual ~RenderListBox();
 
     void selectionChanged();
 
     void setOptionsChanged(bool changed) { m_optionsChanged = changed; }
 
     int listIndexAtOffset(const LayoutSize&);
     LayoutRect itemBoundingBoxRect(const LayoutPoint&, int index);
@@ skipping 104 matching lines @@
     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isListBox());
     return static_cast<RenderListBox*>(object);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toRenderListBox(const RenderListBox*);
 
 } // namepace WebCore
 
 #endif // RenderListBox_h