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

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 "ash/common/shelf/shelf_item_delegate.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 
 namespace ash {
 
 // ShelfItemDelegate for TYPE_APP_LIST.
 class AppListShelfItemDelegate : public ShelfItemDelegate {
  public:
   AppListShelfItemDelegate();
 
   ~AppListShelfItemDelegate() override;
 
   // ShelfItemDelegate:
   ShelfItemDelegate::PerformedAction ItemSelected(
       const ui::Event& event) override;
   base::string16 GetTitle() override;
   ShelfMenuModel* CreateApplicationMenu(int event_flags) override;
   bool IsDraggable() override;
   bool CanPin() const override;
   bool ShouldShowTooltip() override;
   void Close() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AppListShelfItemDelegate);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELF_APP_LIST_SHELF_ITEM_DELEGATE_H_