Cleanup: Remove MenuEventDispatcher

ui/views/controls/menu/menu_event_dispatcher.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_EVENT_DISPATCHER_H_
-#define UI_VIEWS_CONTROLS_MENU_MENU_EVENT_DISPATCHER_H_
-
-#include <stdint.h>
-
-#include "base/macros.h"
-#include "ui/events/platform/platform_event_dispatcher.h"
-
-namespace views {
-
-class MenuController;
-
-namespace internal {
-
-// A message-pump dispatcher object used to dispatch events from the nested
-// message-loop initiated by the MenuController.
-class MenuEventDispatcher : public ui::PlatformEventDispatcher {
- public:
-  explicit MenuEventDispatcher(MenuController* menu_controller);
-  ~MenuEventDispatcher() override;
-
- private:
-  // ui::PlatformEventDispatcher:
-  bool CanDispatchEvent(const ui::PlatformEvent& event) override;
-  uint32_t DispatchEvent(const ui::PlatformEvent& event) override;
-
-  MenuController* menu_controller_;
-
-  DISALLOW_COPY_AND_ASSIGN(MenuEventDispatcher);
-};
-
-}  // namespace internal
-}  // namespace views
-
-#endif  // UI_VIEWS_CONTROLS_MENU_MENU_EVENT_DISPATCHER_H_