Notify the Blink client synchronously if the initial doc is accessed.

third_party/WebKit/Source/core/loader/FrameLoader.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) Research In Motion Limited 2009. All rights reserved.
  * Copyright (C) 2011 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:
  *
@@ skipping 82 matching lines @@
 
     // Warning: stopAllLoaders can and will detach the LocalFrame out from under you. All callers need to either protect the LocalFrame
     // or guarantee they won't in any way access the LocalFrame after stopAllLoaders returns.
     void stopAllLoaders();
 
     // FIXME: clear() is trying to do too many things. We should break it down into smaller functions.
     void clear();
 
     void replaceDocumentWhileExecutingJavaScriptURL(const String& source, Document* ownerDocument);
 
-    // Sets a timer to notify the client that the initial empty document has
-    // been accessed, and thus it is no longer safe to show a provisional URL
-    // above the document without risking a URL spoof.
+    // Notifies the client that the initial empty document has been accessed,
+    // and thus it is no longer safe to show a provisional URL above the
+    // document without risking a URL spoof. The client must not call back into
+    // JavaScript.
     void didAccessInitialDocument();
 
-    // If the initial empty document is showing and has been accessed, this
-    // cancels the timer and immediately notifies the client in cases that
-    // waiting to notify would allow a URL spoof.
-    void notifyIfInitialDocumentAccessed();
-
     DocumentLoader* documentLoader() const { return m_documentLoader.get(); }
     DocumentLoader* provisionalDocumentLoader() const { return m_provisionalDocumentLoader.get(); }
 
     void loadFailed(DocumentLoader*, const ResourceError&);
 
     bool isLoadingMainFrame() const;
 
     bool shouldTreatURLAsSameAsCurrent(const KURL&) const;
     bool shouldTreatURLAsSrcdocDocument(const KURL&) const;
 
@@ skipping 151 matching lines @@
         HistoryLoadType m_historyLoadType;
     };
 
     Member<DeferredHistoryLoad> m_deferredHistoryLoad;
 
     bool m_inStopAllLoaders;
 
     Timer<FrameLoader> m_checkTimer;
 
     bool m_didAccessInitialDocument;
-    Timer<FrameLoader> m_didAccessInitialDocumentTimer;
 
     SandboxFlags m_forcedSandboxFlags;
 
     bool m_dispatchingDidClearWindowObjectInMainWorld;
     bool m_protectProvisionalLoader;
 };
 
 } // namespace blink
 
 #endif // FrameLoader_h