Pass the render view host with all provisional load related callbacks on the web contents observer

chrome/browser/external_tab/external_tab_container_win.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 CHROME_BROWSER_EXTERNAL_TAB_EXTERNAL_TAB_CONTAINER_WIN_H_
 #define CHROME_BROWSER_EXTERNAL_TAB_EXTERNAL_TAB_CONTAINER_WIN_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 184 matching lines @@
   void RegisterRenderViewHost(content::RenderViewHost* render_view_host);
   void UnregisterRenderViewHost(content::RenderViewHost* render_view_host);
 
   // Overridden from content::WebContentsObserver:
   virtual bool OnMessageReceived(const IPC::Message& message);
   virtual void DidFailProvisionalLoad(
       int64 frame_id,
       bool is_main_frame,
       const GURL& validated_url,
       int error_code,
-      const string16& error_description) OVERRIDE;
+      const string16& error_description,
+      content::RenderViewHost* render_view_host) OVERRIDE;
 
   // Message handlers
   void OnForwardMessageToExternalHost(const std::string& message,
                                       const std::string& origin,
                                       const std::string& target);
 
   // Overridden from content::NotificationObserver:
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details);
@@ skipping 202 matching lines @@
     return false;
   }
 
   virtual void BeforeUnloadFired(content::WebContents* tab, bool proceed,
                                  bool* proceed_to_fire_unload) {
     NOTREACHED();
   }
 };
 
 #endif  // CHROME_BROWSER_EXTERNAL_TAB_EXTERNAL_TAB_CONTAINER_WIN_H_