Remove multiple inheritance from input_method_menu_button.h.

chrome/browser/chromeos/status/input_method_menu_button.h

 // Copyright (c) 2010 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_CHROMEOS_STATUS_INPUT_METHOD_MENU_BUTTON_H_
 #define CHROME_BROWSER_CHROMEOS_STATUS_INPUT_METHOD_MENU_BUTTON_H_
 #pragma once
 
 #include <string>
 
 #include "chrome/browser/chromeos/status/input_method_menu.h"
 #include "chrome/browser/chromeos/status/status_area_button.h"
+#include "views/controls/menu/view_menu_delegate.h"
 
 namespace chromeos {
 
 class StatusAreaHost;
 
 // A class for the button in the status area which expands the dropdown menu for
 // switching input method and keyboard layout.
 class InputMethodMenuButton : public StatusAreaButton,
-                              public InputMethodMenu {
+                              public views::ViewMenuDelegate {
  public:
   explicit InputMethodMenuButton(StatusAreaHost* host);
   virtual ~InputMethodMenuButton() {}
 
   // views::View implementation.
   virtual gfx::Size GetPreferredSize();
   virtual void OnLocaleChanged();
 
- private:
+  // views::ViewMenuDelegate implementation.
+  virtual void RunMenu(views::View* unused_source, const gfx::Point& pt);
+
   // InputMethodMenu implementation.
   virtual void UpdateUI(const std::string& input_method_id,
                         const std::wstring& name,
                         const std::wstring& tooltip,
                         size_t num_active_input_methods);
   virtual bool ShouldSupportConfigUI();
   virtual void OpenConfigUI();
 
+ private:
+  scoped_ptr<InputMethodMenu> menu_;
   StatusAreaHost* host_;
 
   DISALLOW_COPY_AND_ASSIGN(InputMethodMenuButton);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_STATUS_INPUT_METHOD_MENU_BUTTON_H_