Support frame tree propagation between renderers in the same browsing instance.

content/browser/web_contents/web_contents_impl.h

 // Copyright (c) 2012 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_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 
 #include <map>
 #include <string>
 
@@ skipping 304 matching lines @@
   virtual void UpdateTargetURL(int32 page_id, const GURL& url) OVERRIDE;
   virtual void Close(content::RenderViewHost* render_view_host) OVERRIDE;
   virtual void RequestMove(const gfx::Rect& new_bounds) OVERRIDE;
   virtual void SwappedOut(content::RenderViewHost* render_view_host) OVERRIDE;
   virtual void DidStartLoading(
       content::RenderViewHost* render_view_host) OVERRIDE;
   virtual void DidStopLoading(
       content::RenderViewHost* render_view_host) OVERRIDE;
   virtual void DidCancelLoading() OVERRIDE;
   virtual void DidChangeLoadProgress(double progress) OVERRIDE;
+  virtual void DidUpdateFrameTree(content::RenderViewHost* rvh) OVERRIDE;
   virtual void DocumentAvailableInMainFrame(
       content::RenderViewHost* render_view_host) OVERRIDE;
   virtual void DocumentOnLoadCompletedInMainFrame(
       content::RenderViewHost* render_view_host,
       int32 page_id) OVERRIDE;
   virtual void RequestOpenURL(content::RenderViewHost* rvh,
                               const GURL& url,
                               const content::Referrer& referrer,
                               WindowOpenDisposition disposition,
                               int64 source_frame_id) OVERRIDE;
@@ skipping 482 matching lines @@
   content::NotificationRegistrar registrar_;
 
   // Used during IPC message dispatching so that the handlers can get a pointer
   // to the RVH through which the message was received.
   content::RenderViewHost* message_source_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsImpl);
 };
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_