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

Source/core/svg/SVGMarkerElement.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 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 105 matching lines @@
 
     static PassRefPtr<SVGMarkerElement> create(const QualifiedName&, const Handle<Document>&);
 
     AffineTransform viewBoxToViewTransform(float viewWidth, float viewHeight) const;
 
     void setOrientToAuto();
     void setOrientToAngle(const SVGAngle&);
 
     static const SVGPropertyInfo* orientTypePropertyInfo();
 
+    virtual void accept(Visitor* visitor) const OVERRIDE { SVGStyledElement::accept(visitor); }
+
 private:
     SVGMarkerElement(const QualifiedName&, const Handle<Document>&);
 
     virtual bool needsPendingResourceHandling() const { return false; }
 
     bool isSupportedAttribute(const QualifiedName&);
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
     virtual void svgAttributeChanged(const QualifiedName&);
     virtual void childrenChanged(bool changedByParser = false, const Handle<Node>& beforeChange = nullptr, const Handle<Node>& afterChange = nullptr, int childCountDelta = 0);
 
@@ skipping 35 matching lines @@
 inline SVGMarkerElement* toSVGMarkerElement(SVGElement* element)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!element || element->hasTagName(SVGNames::markerTag));
     return static_cast<SVGMarkerElement*>(element);
 }
 
 }
 
 #endif
 #endif