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

Source/core/svg/SVGStyledLocatableElement.h

 /*
  * Copyright (C) 2004, 2005, 2008 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 23 matching lines @@
 public:
     virtual SVGElement* nearestViewportElement() const;
     virtual SVGElement* farthestViewportElement() const;
 
     virtual FloatRect getBBox(StyleUpdateStrategy = AllowStyleUpdate);
     virtual AffineTransform getCTM(StyleUpdateStrategy = AllowStyleUpdate);
     virtual AffineTransform getScreenCTM(StyleUpdateStrategy = AllowStyleUpdate);
 
     virtual AffineTransform localCoordinateSpaceTransform(SVGLocatable::CTMScope mode) const { return SVGLocatable::localCoordinateSpaceTransform(mode); }
 
+    virtual void accept(Visitor* visitor) const OVERRIDE { SVGStyledElement::accept(visitor); }
+
 protected:
     SVGStyledLocatableElement(const QualifiedName&, const Handle<Document>&, ConstructionType = CreateSVGElement);
 
 private:
     virtual bool isStyledLocatable() const OVERRIDE { return true; }
 };
 
 inline SVGStyledLocatableElement* toSVGStyledLocatableElement(SVGElement* element)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!element || element->isStyledLocatable());
     return static_cast<SVGStyledLocatableElement*>(element);
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(SVG)
 #endif // SVGStyledLocatableElement_h