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

ash/common/shelf/shelf_model.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_COMMON_SHELF_SHELF_MODEL_H_
 #define ASH_COMMON_SHELF_SHELF_MODEL_H_
 
 #include <map>
 #include <memory>
 
 #include "ash/ash_export.h"
 #include "ash/common/shelf/shelf_item_types.h"
+#include "ash/public/interfaces/shelf.mojom.h"
 #include "base/macros.h"
 #include "base/observer_list.h"
 
 namespace ash {
 
-class ShelfItemDelegate;
 class ShelfModelObserver;
 
 // Model used for shelf items. Owns ShelfItemDelegates but does not create them.
 class ASH_EXPORT ShelfModel {
  public:
   ShelfModel();
   ~ShelfModel();
 
   // Cleans up the ShelfItemDelegates.
   void DestroyItemDelegates();
@@ skipping 40 matching lines @@
   ShelfID reserve_external_id() { return next_id_++; }
 
   // Returns an iterator into items() for the item with the specified id, or
   // items().end() if there is no item with the specified id.
   ShelfItems::const_iterator ItemByID(ShelfID id) const;
 
   const ShelfItems& items() const { return items_; }
   int item_count() const { return static_cast<int>(items_.size()); }
 
   // Set |item_delegate| for |id| and takes ownership.
-  void SetShelfItemDelegate(ShelfID id,
-                            std::unique_ptr<ShelfItemDelegate> item_delegate);
+  void SetShelfItemDelegate(
+      ShelfID id,
+      std::unique_ptr<mojom::ShelfItemDelegate> item_delegate);
 
   // Returns ShelfItemDelegate for |id|, or null if none exists.
-  ShelfItemDelegate* GetShelfItemDelegate(ShelfID id);
+  mojom::ShelfItemDelegate* GetShelfItemDelegate(ShelfID id);
 
   void AddObserver(ShelfModelObserver* observer);
   void RemoveObserver(ShelfModelObserver* observer);
 
  private:
   // Makes sure |index| is in line with the type-based order of items. If that
   // is not the case, adjusts index by shifting it to the valid range and
   // returns the new value.
   int ValidateInsertionIndex(ShelfItemType type, int index) const;
 
   // Remove and destroy ShelfItemDelegate for |id|.
   void RemoveShelfItemDelegate(ShelfID id);
 
   // ID assigned to the next item.
   ShelfID next_id_;
 
   ShelfItems items_;
   base::ObserverList<ShelfModelObserver> observers_;
 
-  std::map<ShelfID, std::unique_ptr<ShelfItemDelegate>>
+  std::map<ShelfID, std::unique_ptr<mojom::ShelfItemDelegate>>
       id_to_item_delegate_map_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfModel);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SHELF_SHELF_MODEL_H_