Notify the HTMLDocumentParser on document element available

third_party/WebKit/Source/core/dom/DocumentParser.h

 /*
  * Copyright (C) 2000 Peter Kelly (pmk@post.com)
  * Copyright (C) 2005, 2006 Apple Computer, Inc.
  * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
  * Copyright (C) 2010 Google, Inc.
  *
  * 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.
@@ skipping 68 matching lines @@
     virtual void stopParsing();
 
     // Document is expected to detach the parser before releasing its ref.
     // After detach, m_document is cleared.  The parser will unwind its
     // callstacks, but not produce any more nodes.
     // It is impossible for the parser to touch the rest of WebCore after
     // detach is called.
     // Oilpan: We don't need to call detach when a Document is destructed.
     virtual void detach();
 
+    // Notifies the parser that the document element is available. Used by
+    // HTMLDocumentParser to dispatch preloads.
+    virtual void documentElementAvailable() { }
+
     void setDocumentWasLoadedAsPartOfNavigation() { m_documentWasLoadedAsPartOfNavigation = true; }
     bool documentWasLoadedAsPartOfNavigation() const { return m_documentWasLoadedAsPartOfNavigation; }
 
     // FIXME: The names are not very accurate :(
     virtual void suspendScheduledTasks();
     virtual void resumeScheduledTasks();
 
     void addClient(DocumentParserClient*);
     void removeClient(DocumentParserClient*);
 
@@ skipping 13 matching lines @@
     // Every DocumentParser needs a pointer back to the document.
     // m_document will be 0 after the parser is stopped.
     Member<Document> m_document;
 
     HeapHashSet<WeakMember<DocumentParserClient>> m_clients;
 };
 
 } // namespace blink
 
 #endif // DocumentParser_h