Fix pushState causing stop/reload button and favicon to flicker.

content/browser/frame_host/render_frame_host_delegate.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_DELEGATE_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_DELEGATE_H_
 
 #include "content/common/content_export.h"
 
 namespace IPC {
@@ skipping 14 matching lines @@
                                  const IPC::Message& message);
 
   // Informs the delegate whenever a RenderFrameHost is created.
   virtual void RenderFrameCreated(RenderFrameHost* render_frame_host) {}
 
   // Informs the delegate whenever a RenderFrameHost is deleted.
   virtual void RenderFrameDeleted(RenderFrameHost* render_frame_host) {}
 
   // The top-level RenderFrame began loading a new page. This corresponds to
   // Blink's notion of the throbber starting.
-  virtual void DidStartLoading(RenderFrameHost* render_frame_host) {}
+  virtual void DidStartLoading(RenderFrameHost* render_frame_host,
+                               bool to_different_document) {}
 
   // The top-level RenderFrame stopped loading a page. This corresponds to
   // Blink's notion of the throbber stopping.
   virtual void DidStopLoading(RenderFrameHost* render_frame_host) {}
 
   // Notification that a worker process has crashed.
   virtual void WorkerCrashed(RenderFrameHost* render_frame_host) {}
 
   // A context menu should be shown, to be built using the context information
   // provided in the supplied params.
   virtual void ShowContextMenu(RenderFrameHost* render_frame_host,
                                const ContextMenuParams& params) {}
 
   // Return this object cast to a WebContents, if it is one. If the object is
   // not a WebContents, returns NULL.
   virtual WebContents* GetAsWebContents();
 
  protected:
   virtual ~RenderFrameHostDelegate() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_DELEGATE_H_