Apply FINAL to the RenderObject hierarchy.

Source/core/rendering/RenderMenuList.h

 /*
  * This file is part of the select element renderer in WebCore.
  *
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 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 16 matching lines @@
 #include "LayoutRect.h"
 #include "PopupMenu.h"
 #include "PopupMenuClient.h"
 #include "RenderFlexibleBox.h"
 
 namespace WebCore {
 
 class HTMLSelectElement;
 class RenderText;
 
-class RenderMenuList : public RenderFlexibleBox, private PopupMenuClient {
+class RenderMenuList FINAL : public RenderFlexibleBox, private PopupMenuClient {
 
 public:
     RenderMenuList(Element*);
     virtual ~RenderMenuList();
 
 public:
     bool popupIsVisible() const { return m_popupIsVisible; }
     void showPopup();
     void hidePopup();
 
@@ skipping 98 matching lines @@
     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isMenuList());
     return static_cast<RenderMenuList*>(object);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toRenderMenuList(const RenderMenuList*);
 
 }
 
 #endif