AppListController refactoring part 1: AppListShower implementation.

ui/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 UI_APP_LIST_SHOWER_APP_LIST_SHOWER_DELEGATE_FACTORY_H_
+#define UI_APP_LIST_SHOWER_APP_LIST_SHOWER_DELEGATE_FACTORY_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "ui/app_list/shower/app_list_shower_export.h"
+
+namespace app_list {
+
+class AppListShower;
+class AppListShowerDelegate;
+
+class APP_LIST_SHOWER_EXPORT AppListShowerDelegateFactory {
+ public:
+  virtual ~AppListShowerDelegateFactory() {}
+
+  virtual scoped_ptr<AppListShowerDelegate> GetDelegate(
+      AppListShower* shower) = 0;
+};
+
+}  // namespace app_list
+
+#endif  // UI_APP_LIST_SHOWER_APP_LIST_SHOWER_DELEGATE_FACTORY_H_