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 @@
     RenderObject* firstChild() const { ASSERT(children() == virtualChildren()); return children()->firstChild(); }
     RenderObject* lastChild() const { ASSERT(children() == virtualChildren()); return children()->lastChild(); }
 
     const RenderObjectChildList* children() const { return &m_children; }
     RenderObjectChildList* children() { return &m_children; }
 
     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 34 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