mash: Cleanup ash shelf application menu code.

chrome/browser/ui/ash/launcher/launcher_application_menu_item_model.h

-// Copyright (c) 2012 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_ASH_LAUNCHER_LAUNCHER_APPLICATION_MENU_ITEM_MODEL_H_
-#define CHROME_BROWSER_UI_ASH_LAUNCHER_LAUNCHER_APPLICATION_MENU_ITEM_MODEL_H_
-
-#include <memory>
-#include <vector>
-
-#include "base/macros.h"
-#include "ui/base/models/simple_menu_model.h"
-
-class ChromeLauncherAppMenuItem;
-class LauncherApplicationMenuItemModelTestAPI;
-
-// A list of the elements which makes up a simple menu description.
-using ChromeLauncherAppMenuItems =
-    std::vector<std::unique_ptr<ChromeLauncherAppMenuItem>>;
-
-// A menu model that builds the contents of a menu for a launcher item
-// containing a list of running applications.
-class LauncherApplicationMenuItemModel : public ui::SimpleMenuModel,
-                                         public ui::SimpleMenuModel::Delegate {
- public:
-  explicit LauncherApplicationMenuItemModel(
-      ChromeLauncherAppMenuItems item_list);
-  ~LauncherApplicationMenuItemModel() override;
-
-  // Overridden from ui::SimpleMenuModel::Delegate:
-  bool IsCommandIdChecked(int command_id) const override;
-  bool IsCommandIdEnabled(int command_id) const override;
-  void ExecuteCommand(int command_id, int event_flags) override;
-
- private:
-  friend class LauncherApplicationMenuItemModelTestAPI;
-
-  void Build();
-
-  // Returns the number of menu items that are enabled.
-  int GetNumMenuItemsEnabled() const;
-
-  // Records UMA metrics when a menu item is selected.
-  void RecordMenuItemSelectedMetrics(int command_id,
-                                     int num_menu_items_enabled);
-
-  // The list of menu items as returned from the launcher controller.
-  ChromeLauncherAppMenuItems launcher_items_;
-
-  DISALLOW_COPY_AND_ASSIGN(LauncherApplicationMenuItemModel);
-};
-
-#endif  // CHROME_BROWSER_UI_ASH_LAUNCHER_LAUNCHER_APPLICATION_MENU_ITEM_MODEL_H_