Revert "chromeos: Move files in //ash/common to //ash, part 2"

ash/shelf/app_list_shelf_item_delegate.h

-// Copyright 2013 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_SHELF_APP_LIST_SHELF_ITEM_DELEGATE_H_
-#define ASH_SHELF_APP_LIST_SHELF_ITEM_DELEGATE_H_
-
-#include "ash/shelf/shelf_item_delegate.h"
-#include "base/macros.h"
-
-namespace ash {
-class ShelfModel;
-
-// ShelfItemDelegate for TYPE_APP_LIST.
-class AppListShelfItemDelegate : public ShelfItemDelegate {
- public:
-  // Initializes the app list item in the shelf data model and creates an
-  // AppListShelfItemDelegate which will be owned by |model|.
-  static void CreateAppListItemAndDelegate(ShelfModel* model);
-
-  AppListShelfItemDelegate();
-  ~AppListShelfItemDelegate() override;
-
-  // ShelfItemDelegate:
-  ShelfAction ItemSelected(ui::EventType event_type,
-                           int event_flags,
-                           int64_t display_id,
-                           ShelfLaunchSource source) override;
-  ShelfAppMenuItemList GetAppMenuItems(int event_flags) override;
-  void ExecuteCommand(uint32_t command_id, int event_flags) override;
-  void Close() override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(AppListShelfItemDelegate);
-};
-
-}  // namespace ash
-
-#endif  // ASH_SHELF_APP_LIST_SHELF_ITEM_DELEGATE_H_