Revert of AppListController refactoring part 2: Ash's AppListShowerDelegate imlementation.

ash/app_list/app_list_shower_delegate_factory.h

-// Copyright 2016 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_APP_LIST_APP_LIST_SHOWER_DELEGATE_FACTORY_H_
-#define ASH_APP_LIST_APP_LIST_SHOWER_DELEGATE_FACTORY_H_
-
-#include <memory>
-
-#include "ash/ash_export.h"
-#include "base/macros.h"
-#include "ui/app_list/shower/app_list_shower_delegate_factory.h"
-
-namespace app_list {
-class AppListShower;
-}
-
-namespace ash {
-
-class AppListViewDelegateFactory;
-
-class ASH_EXPORT AppListShowerDelegateFactory
-    : public app_list::AppListShowerDelegateFactory {
- public:
-  explicit AppListShowerDelegateFactory(
-      std::unique_ptr<AppListViewDelegateFactory> view_delegate_factory);
-  ~AppListShowerDelegateFactory() override;
-
-  std::unique_ptr<app_list::AppListShowerDelegate> GetDelegate(
-      app_list::AppListShower* shower) override;
-
- private:
-  std::unique_ptr<AppListViewDelegateFactory> view_delegate_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(AppListShowerDelegateFactory);
-};
-
-}  // namespace ash
-
-#endif  // ASH_APP_LIST_APP_LIST_SHOWER_DELEGATE_FACTORY_H_