Apply FINAL to the RenderObject hierarchy.

Source/core/rendering/RenderBoxModelObject.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2006, 2007, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google 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 270 matching lines @@
     // Move all of the kids from |startChild| up to but excluding |endChild|. 0 can be passed as the |endChild| to denote
     // that all the kids from |startChild| onwards should be moved.
     void moveChildrenTo(RenderBoxModelObject* toBoxModelObject, RenderObject* startChild, RenderObject* endChild, bool fullRemoveInsert = false)
     {
         moveChildrenTo(toBoxModelObject, startChild, endChild, 0, fullRemoveInsert);
     }
     void moveChildrenTo(RenderBoxModelObject* toBoxModelObject, RenderObject* startChild, RenderObject* endChild, RenderObject* beforeChild, bool fullRemoveInsert = false);
 
 private:
     LayoutUnit computedCSSPadding(Length) const;
-    virtual bool isBoxModelObject() const { return true; }
+    virtual bool isBoxModelObject() const OVERRIDE FINAL { return true; }
     
     virtual LayoutRect frameRectForStickyPositioning() const = 0;
 
     IntSize calculateFillTileSize(const FillLayer*, const IntSize& scaledPositioningAreaSize) const;
 
     enum ScaleByEffectiveZoomOrNot { ScaleByEffectiveZoom, DoNotScaleByEffectiveZoom };
     IntSize calculateImageIntrinsicDimensions(StyleImage*, const IntSize& scaledPositioningAreaSize, ScaleByEffectiveZoomOrNot) const;
 
     RoundedRect getBackgroundRoundedRect(const LayoutRect&, InlineFlowBox*, LayoutUnit inlineBoxWidth, LayoutUnit inlineBoxHeight,
         bool includeLogicalLeftEdge, bool includeLogicalRightEdge) const;
@@ skipping 27 matching lines @@
     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isBoxModelObject());
     return static_cast<const RenderBoxModelObject*>(object);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toRenderBoxModelObject(const RenderBoxModelObject*);
 
 } // namespace WebCore
 
 #endif // RenderBoxModelObject_h