Apply FINAL to the RenderObject hierarchy.

Source/core/rendering/svg/RenderSVGViewportContainer.h

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2009 Google, Inc.
  * Copyright (C) 2009 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 12 matching lines @@
 #ifndef RenderSVGViewportContainer_h
 #define RenderSVGViewportContainer_h
 
 #if ENABLE(SVG)
 #include "RenderSVGContainer.h"
 
 namespace WebCore {
 
 // This is used for non-root <svg> elements and <marker> elements, neither of which are SVGTransformable
 // thus we inherit from RenderSVGContainer instead of RenderSVGTransformableContainer
-class RenderSVGViewportContainer : public RenderSVGContainer {
+class RenderSVGViewportContainer FINAL : public RenderSVGContainer {
 public:
     explicit RenderSVGViewportContainer(SVGStyledElement*);
     FloatRect viewport() const { return m_viewport; }
 
     bool isLayoutSizeChanged() const { return m_isLayoutSizeChanged; }
     virtual bool didTransformToRootUpdate() { return m_didTransformToRootUpdate; }
 
     virtual void determineIfLayoutSizeChanged();
     virtual void setNeedsTransformUpdate() { m_needsTransformUpdate = true; }
 
@@ skipping 31 matching lines @@
     return static_cast<const RenderSVGViewportContainer*>(object);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toRenderSVGViewportContainer(const RenderSVGViewportContainer*);
 
 } // namespace WebCore
 
 #endif // ENABLE(SVG)
 #endif // RenderSVGViewportContainer_h