mash: Fold ShelfItemDelegateManager into ShelfModel

ash/test/shelf_item_delegate_manager_test_api.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_TEST_SHELF_ITEM_DELEGATE_MANAGER_TEST_API_H_
-#define ASH_TEST_SHELF_ITEM_DELEGATE_MANAGER_TEST_API_H_
-
-#include "base/macros.h"
-
-namespace ash {
-
-class ShelfItemDelegateManager;
-
-namespace test {
-
-// Accesses private methods from a ShelfItemDelegateManager for testing.
-class ShelfItemDelegateManagerTestAPI {
- public:
-  explicit ShelfItemDelegateManagerTestAPI(ShelfItemDelegateManager* manager);
-
-  // Clear all exsiting ShelfItemDelegate for test.
-  void RemoveAllShelfItemDelegateForTest();
-
- private:
-  ShelfItemDelegateManager* manager_;  // Not owned.
-
-  DISALLOW_COPY_AND_ASSIGN(ShelfItemDelegateManagerTestAPI);
-};
-
-}  // namespace test
-}  // namespace ash
-
-#endif  // ASH_TEST_SHELF_ITEM_DELEGATE_MANAGER_TEST_API_H_