mash: Use mojo for ShelfItemDelegate and [app] MenuItem.

ash/public/cpp/shelf_application_menu_item.h

-// Copyright 2017 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 ASH_PUBLIC_CPP_SHELF_APPLICATION_MENU_ITEM_H_
-#define ASH_PUBLIC_CPP_SHELF_APPLICATION_MENU_ITEM_H_
-
-#include <memory>
-#include <vector>
-
-#include "ash/public/cpp/ash_public_export.h"
-#include "base/macros.h"
-#include "base/strings/string16.h"
-#include "ui/gfx/image/image.h"
-
-namespace ash {
-
-// The command id, title, and icon for shelf application menu items.
-class ASH_PUBLIC_EXPORT ShelfApplicationMenuItem {
- public:
-  // Creates an item with a client-specific |command_id|, a |title|, and an
-  // optional |icon| (pass nullptr for no icon).
-  ShelfApplicationMenuItem(uint32_t command_id,
-                           const base::string16& title,
-                           const gfx::Image* icon = nullptr);
-  ~ShelfApplicationMenuItem();
-
-  // The title and icon for this menu item.
-  uint32_t command_id() const { return command_id_; }
-  const base::string16& title() const { return title_; }
-  const gfx::Image& icon() const { return icon_; }
-
- private:
-  const uint32_t command_id_;
-  const base::string16 title_;
-  const gfx::Image icon_;
-
-  DISALLOW_COPY_AND_ASSIGN(ShelfApplicationMenuItem);
-};
-
-using ShelfAppMenuItemList =
-    std::vector<std::unique_ptr<ShelfApplicationMenuItem>>;
-
-}  // namespace ash
-
-#endif  // ASH_PUBLIC_CPP_SHELF_APPLICATION_MENU_ITEM_H_