Apply FINAL to the RenderObject hierarchy.

Source/core/rendering/RenderBR.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *
  * 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
@@ skipping 13 matching lines @@
 #include "RenderText.h"
 
 /*
  * The whole class here is a hack to get <br> working, as long as we don't have support for
  * CSS2 :before and :after pseudo elements
  */
 namespace WebCore {
 
 class Position;
 
-class RenderBR : public RenderText {
+class RenderBR FINAL : public RenderText {
 public:
     explicit RenderBR(Node*);
     virtual ~RenderBR();
 
     virtual const char* renderName() const { return "RenderBR"; }
  
     virtual LayoutRect selectionRectForRepaint(const RenderLayerModelObject* /*repaintContainer*/, bool /*clipToVisibleContent*/) OVERRIDE { return LayoutRect(); }
 
     virtual float width(unsigned /*from*/, unsigned /*len*/, const Font&, float /*xPos*/, HashSet<const SimpleFontData*>* = 0 /*fallbackFonts*/ , GlyphOverflow* = 0) const { return 0; }
     virtual float width(unsigned /*from*/, unsigned /*len*/, float /*xpos*/, bool = false /*firstLine*/, HashSet<const SimpleFontData*>* = 0 /*fallbackFonts*/, GlyphOverflow* = 0) const { return 0; }
@@ skipping 27 matching lines @@
     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isBR());
     return static_cast<const RenderBR*>(object);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toRenderBR(const RenderBR*);
 
 } // namespace WebCore
 
 #endif // RenderBR_h