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

chrome/browser/ui/webui/keyboard_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_KEYBOARD_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_KEYBOARD_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"
 
 // The TabContents used for the keyboard page.
-class KeyboardUI : public WebUI, public content::WebUIController {
+class KeyboardUI : public content::WebUIController {
  public:
-  explicit KeyboardUI(content::WebContents* manager);
+  explicit KeyboardUI(WebUI* web_ui);
   virtual ~KeyboardUI();
 
   class KeyboardHTMLSource : public ChromeURLDataManager::DataSource {
    public:
     KeyboardHTMLSource();
 
     // Overrides from DataSource
     virtual void StartDataRequest(const std::string& path,
                                   bool is_incognito,
                                   int request_id) OVERRIDE;
     virtual std::string GetMimeType(const std::string&) const OVERRIDE;
 
    private:
     virtual ~KeyboardHTMLSource() {}
 
     DISALLOW_COPY_AND_ASSIGN(KeyboardHTMLSource);
   };
 
  private:
   DISALLOW_COPY_AND_ASSIGN(KeyboardUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_KEYBOARD_UI_H_