mash: Move shelf model and item classes to ash/common/shelf

ash/shelf/shelf_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_SHELF_DELEGATE_H_
 #define ASH_SHELF_SHELF_DELEGATE_H_
 
 #include "ash/ash_export.h"
-#include "ash/shelf/shelf_item_types.h"
+#include "ash/common/shelf/shelf_item_types.h"
 
 namespace ash {
 class Shelf;
 
 // Delegate for the Shelf.
 class ASH_EXPORT ShelfDelegate {
  public:
   // Shelf owns the delegate.
   virtual ~ShelfDelegate() {}
 
@@ skipping 36 matching lines @@
   // Check if the app with |app_id_| is pinned to the shelf.
   virtual bool IsAppPinned(const std::string& app_id) = 0;
 
   // Unpins app item with |app_id|.
   virtual void UnpinAppWithID(const std::string& app_id) = 0;
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELF_SHELF_DELEGATE_H_