Add hasCommittedRealDocument API to WebFrame.

Source/web/WebFrameImpl.h

 /*
  * Copyright (C) 2009 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 133 matching lines @@
     virtual void loadRequest(const WebURLRequest&);
     virtual void loadHistoryItem(const WebHistoryItem&);
     virtual void loadData(
         const WebData&, const WebString& mimeType, const WebString& textEncoding,
         const WebURL& baseURL, const WebURL& unreachableURL, bool replace);
     virtual void loadHTMLString(
         const WebData& html, const WebURL& baseURL, const WebURL& unreachableURL,
         bool replace);
     virtual bool isLoading() const;
     virtual void stopLoading();
+    virtual bool hasCommittedRealDocument() const;
     virtual WebDataSource* provisionalDataSource() const;
     virtual WebDataSource* dataSource() const;
     virtual WebHistoryItem previousHistoryItem() const;
     virtual WebHistoryItem currentHistoryItem() const;
     virtual void enableViewSourceMode(bool enable);
     virtual bool isViewSourceModeEnabled() const;
     virtual void setReferrerForRequest(WebURLRequest&, const WebURL& referrer);
     virtual void dispatchWillSendRequest(WebURLRequest&);
     virtual WebURLLoader* createAssociatedURLLoader(const WebURLLoaderOptions&);
     virtual unsigned unloadListenerCount() const;
@@ skipping 344 matching lines @@
 {
     return static_cast<const WebFrameImpl*>(webFrame);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toWebFrameImpl(const WebFrameImpl*);
 
 } // namespace WebKit
 
 #endif