Add didCreateNewDocument() notification

public/web/WebFrameClient.h

 /*
  * Copyright (C) 2011, 2012 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 248 matching lines @@
     virtual void didReceiveServerRedirectForProvisionalLoad(WebLocalFrame*) { }
 
     // The provisional load failed.
     virtual void didFailProvisionalLoad(WebLocalFrame*, const WebURLError&) { }
 
     // The provisional datasource is now committed.  The first part of the
     // response body has been received, and the encoding of the response
     // body is known.
     virtual void didCommitProvisionalLoad(WebLocalFrame*, const WebHistoryItem&, WebHistoryCommitType) { }
 
+    // The frame's document has just been initialized.
+    virtual void didCreateNewDocument(WebLocalFrame* frame) { }
+
     // The window object for the frame has been cleared of any extra
     // properties that may have been set by script from the previously
     // loaded document.
     virtual void didClearWindowObject(WebLocalFrame* frame) { }
 
     // The document element has been created.
     virtual void didCreateDocumentElement(WebLocalFrame*) { }
 
     // The page title is available.
     virtual void didReceiveTitle(WebLocalFrame* frame, const WebString& title, WebTextDirection direction) { }
@@ skipping 291 matching lines @@
     // associated with the WebDataSource.
     virtual int64_t serviceWorkerID(WebDataSource&) { return -1; }
 
 protected:
     virtual ~WebFrameClient() { }
 };
 
 } // namespace blink
 
 #endif