[oilpan] The Node hierarchy should have correct accept method chains

Source/core/html/shadow/DetailsMarkerControl.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 25 matching lines @@
 
 namespace WebCore {
 
 class HTMLSummaryElement;
 
 class DetailsMarkerControl : public HTMLDivElement {
 public:
     DetailsMarkerControl(Handle<Document>);
     static PassRefPtr<DetailsMarkerControl> create(Handle<Document>);
 
+    virtual void acceptHeapVisitor(Visitor*) const OVERRIDE;
+
 private:
     virtual RenderObject* createRenderer(RenderArena*, RenderStyle*);
     virtual bool rendererIsNeeded(const NodeRenderingContext&);
     virtual const AtomicString& shadowPseudoId() const;
 
     Result<HTMLSummaryElement> summaryElement();
 };
 
 inline PassRefPtr<DetailsMarkerControl> DetailsMarkerControl::create(Handle<Document> document)
 {
     return adoptRef(new DetailsMarkerControl(document));
 }
 
 }
 
 #endif