[oilpan] Implement accept methods to trace the class hierarchy of SVGElement and all sub-classes.

Source/core/svg/SVGSVGElement.h

 /*
  * Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Rob Buis <buis@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,
@@ skipping 120 matching lines @@
     Element* getElementById(const AtomicString&) const;
 
     bool widthAttributeEstablishesViewport() const;
     bool heightAttributeEstablishesViewport() const;
 
     SVGZoomAndPanType zoomAndPan() const { return m_zoomAndPan; }
     void setZoomAndPan(unsigned short zoomAndPan) { m_zoomAndPan = SVGZoomAndPan::parseFromNumber(zoomAndPan); }
 
     bool hasEmptyViewBox() const { return viewBoxIsValid() && viewBox().isEmpty(); }
 
+    virtual void accept(Visitor* visitor) const OVERRIDE { SVGStyledTransformableElement::accept(visitor); }
+
 private:
     SVGSVGElement(const QualifiedName&, const Handle<Document>&);
     virtual ~SVGSVGElement();
 
     virtual bool isSVGSVGElement() const OVERRIDE { return true; }
     
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
 
     virtual bool rendererIsNeeded(const NodeRenderingContext&) OVERRIDE;
     virtual RenderObject* createRenderer(RenderArena*, RenderStyle*);
@@ skipping 47 matching lines @@
 
 inline SVGSVGElement* toSVGSVGElement(const Handle<Node>& node)
 {
     return toSVGSVGElement(node.raw());
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(SVG)
 #endif