Delete MenuController Nested Message Loop

ui/views/controls/menu/menu_message_loop.h

-// Copyright 2014 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 UI_VIEWS_CONTROLS_MENU_MENU_MESSAGE_LOOP_H_
-#define UI_VIEWS_CONTROLS_MENU_MENU_MESSAGE_LOOP_H_
-
-#include "ui/gfx/native_widget_types.h"
-
-namespace gfx {
-class Point;
-}
-
-namespace ui {
-class LocatedEvent;
-}
-
-namespace views {
-
-class MenuController;
-
-// Interface used by MenuController to run a nested message loop while
-// showing a menu, allowing for platform specific implementations.
-class MenuMessageLoop {
- public:
-  virtual ~MenuMessageLoop() {}
-
-  // Create a platform specific instance.
-  static MenuMessageLoop* Create();
-
-  // Repost |event| to |window|.
-  // |screen_loc| is the event's location in screen coordinates.
-  static void RepostEventToWindow(const ui::LocatedEvent* event,
-                                  gfx::NativeWindow window,
-                                  const gfx::Point& screen_loc);
-
-  // Runs the platform specific bits of the message loop.
-  virtual void Run() = 0;
-
-  // Quit an earlier call to Run().
-  virtual void QuitNow() = 0;
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_CONTROLS_MENU_MENU_MESSAGE_LOOP_H_