Smaller vtbls in RenderObject

Source/core/rendering/svg/RenderSVGRoot.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.  All rights reserved.
  * 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 56 matching lines @@
     }
 
     // localToBorderBoxTransform maps local SVG viewport coordinates to local CSS box coordinates.
     const AffineTransform& localToBorderBoxTransform() const { return m_localToBorderBoxTransform; }
 
 private:
     virtual RenderObjectChildList* virtualChildren() OVERRIDE { return children(); }
     virtual const RenderObjectChildList* virtualChildren() const OVERRIDE { return children(); }
 
     virtual const char* renderName() const OVERRIDE { return "RenderSVGRoot"; }
-    virtual bool isSVGRoot() const OVERRIDE { return true; }
-    virtual bool isSVG() const OVERRIDE { return true; }
+    virtual bool isOfType(RenderObjectType type) const OVERRIDE { return type == RenderObjectSVG || type == RenderObjectSVGRoot || RenderReplaced::isOfType(type); }
 
     virtual LayoutUnit computeReplacedLogicalWidth(ShouldComputePreferred  = ComputeActual) const OVERRIDE;
     virtual LayoutUnit computeReplacedLogicalHeight() const OVERRIDE;
     virtual void layout() OVERRIDE;
     virtual void paintReplaced(PaintInfo&, const LayoutPoint&) OVERRIDE;
 
     virtual void willBeDestroyed() OVERRIDE;
     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE;
     virtual bool isChildAllowed(RenderObject*, RenderStyle*) const OVERRIDE;
     virtual void addChild(RenderObject* child, RenderObject* beforeChild = 0) OVERRIDE;
@@ skipping 35 matching lines @@
     bool m_isLayoutSizeChanged : 1;
     bool m_needsBoundariesOrTransformUpdate : 1;
     bool m_hasBoxDecorationBackground : 1;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderSVGRoot, isSVGRoot());
 
 } // namespace blink
 
 #endif // RenderSVGRoot_h