Add hasCommittedRealDocument API to WebFrame.

public/web/WebFrame.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 331 matching lines @@
                                 const WebURL& baseURL,
                                 const WebURL& unreachableURL = WebURL(),
                                 bool replace = false) = 0;
 
     // Returns true if the current frame is busy loading content.
     virtual bool isLoading() const = 0;
 
     // Stops any pending loads on the frame and its children.
     virtual void stopLoading() = 0;
 
+    // Returns true if the current frame has committed the first real document.
+    virtual bool hasCommittedRealDocument() const = 0;

[darin (slow to review), 2013/09/20 22:03:04]

Note: On the Chromium side, you could also just keep track of whether or not you
ever received a DidCommitProvisionalLoad for this WebFrame. That is not sent
when we load the initial empty document.

See the implementation of FrameLoader::receivedFirstData().

+
     // Returns the data source that is currently loading.  May be null.
     virtual WebDataSource* provisionalDataSource() const = 0;
 
     // Returns the data source that is currently loaded.
     virtual WebDataSource* dataSource() const = 0;
 
     // Returns the previous history item.  Check WebHistoryItem::isNull()
     // before using.
     virtual WebHistoryItem previousHistoryItem() const = 0;
 
@@ skipping 288 matching lines @@
     // text form. This is used only by layout tests.
     virtual WebString layerTreeAsText(bool showDebugInfo = false) const = 0;
 
 protected:
     ~WebFrame() { }
 };
 
 } // namespace WebKit
 
 #endif