RenderFrame: flesh out Observer

chrome/browser/ui/alternate_error_tab_observer.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/ui/alternate_error_tab_observer.h"
 
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/google/google_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/render_messages.h"
 #include "components/user_prefs/pref_registry_syncable.h"
 #include "content/public/browser/notification_service.h"
+#include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
 
+using content::RenderFrameHost;
 using content::RenderViewHost;
 using content::WebContents;
 
 DEFINE_WEB_CONTENTS_USER_DATA_KEY(AlternateErrorPageTabObserver);
 
 AlternateErrorPageTabObserver::AlternateErrorPageTabObserver(
     WebContents* web_contents)
     : content::WebContentsObserver(web_contents),
       profile_(Profile::FromBrowserContext(web_contents->GetBrowserContext())) {
   PrefService* prefs = profile_->GetPrefs();
@@ skipping 58 matching lines @@
   }
   return url;
 }
 
 void AlternateErrorPageTabObserver::OnAlternateErrorPagesEnabledChanged() {
   UpdateAlternateErrorPageURL(web_contents()->GetRenderViewHost());
 }
 
 void AlternateErrorPageTabObserver::UpdateAlternateErrorPageURL(
     RenderViewHost* rvh) {
-  rvh->Send(new ChromeViewMsg_SetAltErrorPageURL(
-                rvh->GetRoutingID(), GetAlternateErrorPageURL()));
+  RenderFrameHost* rfh = rvh->GetMainFrame();
+  rfh->Send(new ChromeViewMsg_SetAltErrorPageURL(
+                rfh->GetRoutingID(), GetAlternateErrorPageURL()));
 }