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

chrome/browser/external_tab/external_tab_container_win.cc

 // 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.
 
 #include "chrome/browser/external_tab/external_tab_container_win.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 763 matching lines @@
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void ExternalTabContainer::DidFailProvisionalLoad(
     int64 frame_id,
     bool is_main_frame,
     const GURL& validated_url,
     int error_code,
-    const string16& error_description) {
+    const string16& error_description,
+    content::RenderViewHost* render_view_host) {
   automation_->Send(new AutomationMsg_NavigationFailed(
       tab_handle_, error_code, validated_url));
   ignore_next_load_notification_ = true;
 }
 
 void ExternalTabContainer::OnForwardMessageToExternalHost(
     const std::string& message,
     const std::string& origin,
     const std::string& target) {
   if (automation_) {
@@ skipping 407 matching lines @@
   if (params.disposition == CURRENT_TAB) {
     DCHECK(route_all_top_level_navigations_);
     forward_params.disposition = NEW_FOREGROUND_TAB;
   }
   WebContents* new_contents =
       ExternalTabContainer::OpenURLFromTab(source, forward_params);
   // support only one navigation for a dummy tab before it is killed.
   ::DestroyWindow(GetNativeView());
   return new_contents;
 }