Make WebUI objects not derive from WebUI. WebUI objects own the controller. This is the ownership...

chrome/browser/ui/webui/hung_renderer_dialog.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/hung_renderer_dialog.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 203 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // HungRendererDialogHandler methods
 
 HungRendererDialogHandler::HungRendererDialogHandler(
     WebContents* contents)
   : contents_(contents) {
 }
 
 void HungRendererDialogHandler::CloseDialog() {
-  static_cast<HtmlDialogUI*>(web_ui())->CloseDialog(NULL);
+  static_cast<HtmlDialogUI*>(web_ui()->GetController())->CloseDialog(NULL);
 }
 
 void HungRendererDialogHandler::RegisterMessages() {
   web_ui()->RegisterMessageCallback("requestTabContentsList",
       base::Bind(&HungRendererDialogHandler::RequestTabContentsList,
                  base::Unretained(this)));
 }
 
 void HungRendererDialogHandler::RequestTabContentsList(
     const base::ListValue* args) {
   ListValue tab_contents_list;
   for (TabContentsIterator it; !it.done(); ++it) {
     if (it->web_contents()->GetRenderProcessHost() ==
         contents_->GetRenderProcessHost()) {
       string16 title = it->web_contents()->GetTitle();
       if (title.empty())
         title = CoreTabHelper::GetDefaultTitle();
       // Add details for |url| and |title|.
       DictionaryValue* dict = new DictionaryValue();
       dict->SetString("url", it->web_contents()->GetURL().spec());
       dict->SetString("title", title);
       tab_contents_list.Append(dict);
     }
   }
   // Send list of tab contents details to javascript.
   web_ui()->CallJavascriptFunction("hungRendererDialog.setTabContentsList",
                                    tab_contents_list);
 }