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

Source/core/html/HTMLViewSourceDocument.h

 /*
  * Copyright (C) 2006, 2008, 2009 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 24 matching lines @@
 
 class HTMLViewSourceDocument : public HTMLDocument {
 public:
     static PassRefPtr<HTMLViewSourceDocument> create(Frame* frame, const KURL& url, const String& mimeType)
     {
         return adoptRef(new HTMLViewSourceDocument(frame, url, mimeType));
     }
 
     void addSource(const String&, HTMLToken&);
 
+    virtual void acceptHeapVisitor(Visitor*) const OVERRIDE;
+
 private:
     HTMLViewSourceDocument(Frame*, const KURL&, const String& mimeType);
 
     // Returns HTMLViewSourceParser or TextDocumentParser based on m_type.
     virtual PassRefPtr<DocumentParser> createParser();
 
     void processDoctypeToken(const String& source, HTMLToken&);
     void processTagToken(const String& source, HTMLToken&);
     void processCommentToken(const String& source, HTMLToken&);
     void processCharacterToken(const String& source, HTMLToken&);
 
     void createContainingTable();
     PassRefPtr<Element> addSpanWithClassName(const AtomicString&);
     void addLine(const AtomicString& className);
     void finishLine();
     void addText(const String& text, const AtomicString& className);
     int addRange(const String& source, int start, int end, const String& className, bool isLink = false, bool isAnchor = false, const String& link = String());
     PassRefPtr<Element> addLink(const AtomicString& url, bool isAnchor);
     PassRefPtr<Element> addBase(const AtomicString& href);
 
     String m_type;
     RefPtr<Element> m_current;
     Persistent<HTMLTableSectionElement> m_tbody;
     Persistent<HTMLTableCellElement> m_td;
 };
 
 }
 
 #endif // HTMLViewSourceDocument_h