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

Source/core/svg/SVGDefsElement.h

 /*
  * Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 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 20 matching lines @@
 namespace WebCore {
 
 class SVGDefsElement : public SVGStyledTransformableElement,
                        public SVGTests,
                        public SVGLangSpace,
                        public SVGExternalResourcesRequired {
     DEFINE_SELF_HANDLE(SVGDefsElement)
 public:
     static PassRefPtr<SVGDefsElement> create(const QualifiedName&, const Handle<Document>&);
 
+    virtual void accept(Visitor* visitor) const OVERRIDE { SVGStyledTransformableElement::accept(visitor); }
+
 private:
     SVGDefsElement(const QualifiedName&, const Handle<Document>&);
 
     virtual bool isValid() const;
 
     virtual RenderObject* createRenderer(RenderArena*, RenderStyle*);
 
     BEGIN_DECLARE_ANIMATED_PROPERTIES(SVGDefsElement)
         DECLARE_ANIMATED_BOOLEAN(ExternalResourcesRequired, externalResourcesRequired)
     END_DECLARE_ANIMATED_PROPERTIES
 
     // SVGTests
     virtual void synchronizeRequiredFeatures() { SVGTests::synchronizeRequiredFeatures(this); }
     virtual void synchronizeRequiredExtensions() { SVGTests::synchronizeRequiredExtensions(this); }
     virtual void synchronizeSystemLanguage() { SVGTests::synchronizeSystemLanguage(this); }
 };
 
 } // namespace WebCore
 
 #endif // ENABLE(SVG)
 #endif