mash: Fold ShelfItemDelegateManager into ShelfModel

ash/test/shelf_item_delegate_manager_test_api.cc

-// 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.
-
-#include "ash/test/shelf_item_delegate_manager_test_api.h"
-
-#include "ash/common/shelf/shelf_item_delegate.h"
-#include "ash/common/shelf/shelf_item_delegate_manager.h"
-#include "base/stl_util.h"
-
-namespace ash {
-namespace test {
-
-ShelfItemDelegateManagerTestAPI::ShelfItemDelegateManagerTestAPI(
-    ShelfItemDelegateManager* manager)
-    : manager_(manager) {
-  DCHECK(manager_);
-}
-
-void ShelfItemDelegateManagerTestAPI::RemoveAllShelfItemDelegateForTest() {
-  STLDeleteContainerPairSecondPointers(
-      manager_->id_to_item_delegate_map_.begin(),
-      manager_->id_to_item_delegate_map_.end());
-  manager_->id_to_item_delegate_map_.clear();
-}
-
-}  // namespace test
-}  // namespace ash