Extract minimal RenderViewHost interface for embedders, leaving

chrome/browser/ui/webui/task_manager_handler.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/webui/task_manager_handler.h"
 
 #include <algorithm>
 #include <functional>
 
 #include "base/bind.h"
@@ skipping 327 matching lines @@
   model_->StartUpdating();
 
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_TASK_MANAGER_WINDOW_READY,
       content::Source<TaskManagerModel>(model_),
       content::NotificationService::NoDetails());
 }
 
 void TaskManagerHandler::OpenAboutMemory(const ListValue* indexes) {
   RenderViewHost* rvh = web_ui()->GetWebContents()->GetRenderViewHost();
-  if (rvh && rvh->delegate()) {
-    WebPreferences webkit_prefs = rvh->delegate()->GetWebkitPrefs();
+  if (rvh && rvh->GetDelegate()) {
+    WebPreferences webkit_prefs = rvh->GetDelegate()->GetWebkitPrefs();
     webkit_prefs.allow_scripts_to_close_windows = true;
     rvh->UpdateWebkitPreferences(webkit_prefs);
   } else {
     DCHECK(false);
   }
 
   task_manager_->OpenAboutMemory();
 }
 
 void TaskManagerHandler::HandleSetUpdateColumn(const ListValue* args) {
@@ skipping 37 matching lines @@
 void TaskManagerHandler::OnGroupAdded(const int group_start,
                                       const int group_length) {
 }
 
 void TaskManagerHandler::OnGroupRemoved(const int group_start,
                                         const int group_length) {
 }
 
 void TaskManagerHandler::OnReadyPeriodicalUpdate() {
 }