Extract minimal RenderViewHost interface for embedders, leaving

chrome/browser/ui/prefs/prefs_tab_helper.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/prefs/prefs_tab_helper.h"
 
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 596 matching lines @@
       }
       break;
     }
     default:
       NOTREACHED();
   }
 }
 
 void PrefsTabHelper::UpdateWebPreferences() {
   content::RenderViewHostDelegate* rvhd =
-      web_contents()->GetRenderViewHost()->delegate();
+      web_contents()->GetRenderViewHost()->GetDelegate();
   WebPreferences prefs = rvhd->GetWebkitPrefs();
   prefs.javascript_enabled =
       per_tab_prefs_->GetBoolean(prefs::kWebKitJavascriptEnabled);
   prefs.javascript_can_open_windows_automatically =
       per_tab_prefs_->GetBoolean(
           prefs::kWebKitJavascriptCanOpenWindowsAutomatically);
   prefs.loads_images_automatically =
       per_tab_prefs_->GetBoolean(prefs::kWebKitLoadsImagesAutomatically);
   prefs.images_enabled =
       per_tab_prefs_->GetBoolean(prefs::kWebKitImagesEnabled);
@@ skipping 29 matching lines @@
 
 void PrefsTabHelper::UpdateRendererPreferences() {
   renderer_preferences_util::UpdateFromSystemSettings(
       web_contents()->GetMutableRendererPrefs(), GetProfile());
   web_contents()->GetRenderViewHost()->SyncRendererPrefs();
 }
 
 Profile* PrefsTabHelper::GetProfile() {
   return Profile::FromBrowserContext(web_contents()->GetBrowserContext());
 }