mash: Move ash/common/wm/shelf to ash/common/shelf

ash/shelf/shelf_item_types.cc

 // Copyright 2014 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.
 
 #include "ash/shelf/shelf_item_types.h"
 
-#include "ash/shelf/shelf_constants.h"
+#include "ash/common/shelf/shelf_constants.h"
 
 namespace ash {
 
 ShelfItem::ShelfItem()
     : type(TYPE_UNDEFINED),
       id(kInvalidShelfID),
       status(STATUS_CLOSED) {
 }
 
 ShelfItem::~ShelfItem() {
 }
 
 ShelfItemDetails::ShelfItemDetails()
     : type(TYPE_UNDEFINED),
       image_resource_id(kInvalidImageResourceID) {
 }
 
 ShelfItemDetails::~ShelfItemDetails() {
 }
 
 }  // namespace ash