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

chrome/browser/ui/webui/bookmarks_ui.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_BOOKMARKS_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_BOOKMARKS_UI_H_
 #pragma once
 
 #include <string>
 
 #include "chrome/browser/ui/webui/chrome_url_data_manager.h"
-#include "content/browser/webui/web_ui.h"
 #include "content/public/browser/web_ui_controller.h"
 
 class RefCountedMemory;
 
 // This class provides the source for chrome://bookmarks/
 class BookmarksUIHTMLSource : public ChromeURLDataManager::DataSource {
  public:
   BookmarksUIHTMLSource();
 
   // Called when the network layer has requested a resource underneath
   // the path we registered.
   virtual void StartDataRequest(const std::string& path,
                                 bool is_incognito,
                                 int request_id) OVERRIDE;
   virtual std::string GetMimeType(const std::string& path) const OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BookmarksUIHTMLSource);
 };
 
 // This class is used to hook up chrome://bookmarks/ which in turn gets
 // overridden by an extension.
-class BookmarksUI : public WebUI, public content::WebUIController {
+class BookmarksUI : public content::WebUIController {
  public:
-  explicit BookmarksUI(content::WebContents* contents);
+  explicit BookmarksUI(WebUI* web_ui);
 
   static RefCountedMemory* GetFaviconResourceBytes();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BookmarksUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_BOOKMARKS_UI_H_