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

ash/app_list/app_list_view_delegate_factory.h

Index: ash/app_list/app_list_view_delegate_factory.h
diff --git a/ash/app_list/app_list_view_delegate_factory.h b/ash/app_list/app_list_view_delegate_factory.h
deleted file mode 100644
index 4de11b4671ec14fc3b531bfc529007212321eb8d..0000000000000000000000000000000000000000
--- a/ash/app_list/app_list_view_delegate_factory.h
+++ /dev/null
@@ -1,25 +0,0 @@
-// 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_WM_APP_LIST_VIEW_DELEGATE_FACTORY_H_
-#define ASH_WM_APP_LIST_VIEW_DELEGATE_FACTORY_H_
-
-#include "ash/ash_export.h"
-
-namespace app_list {
-class AppListViewDelegate;
-}
-
-namespace ash {
-
-class ASH_EXPORT AppListViewDelegateFactory {
- public:
-  virtual ~AppListViewDelegateFactory() {}
-
-  virtual app_list::AppListViewDelegate* GetDelegate() = 0;
-};
-
-}  // namespace ash
-
-#endif  // ASH_WM_APP_LIST_VIEW_DELEGATE_FACTORY_H_