Apply FINAL to the RenderObject hierarchy.

Source/core/rendering/RenderDetailsMarker.h

 /*
  * Copyright (C) 2010, 2011 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef RenderDetailsMarker_h
 #define RenderDetailsMarker_h
 
 #include "RenderBlock.h"
 
 namespace WebCore {
 
-class RenderDetailsMarker : public RenderBlock {
+class RenderDetailsMarker FINAL : public RenderBlock {
 public:
     RenderDetailsMarker(Element*);
 
     enum Orientation { Up, Down, Left, Right };
 
     Orientation orientation() const;
 
 private:
     virtual const char* renderName() const { return "RenderDetailsMarker"; }
     virtual bool isDetailsMarker() const { return true; }
@@ skipping 15 matching lines @@
     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isDetailsMarker());
     return static_cast<const RenderDetailsMarker*>(object);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toRenderDetailsMarker(const RenderDetailsMarker*);
 
 }
 
 #endif // RenderDetailsMarker_h