Create MediaRouterActionController and MediaRouterUIService

chrome/browser/media/router/media_router_ui_service.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 CHROME_BROWSER_MEDIA_ROUTER_MEDIA_ROUTER_UI_SERVICE_H_
+#define CHROME_BROWSER_MEDIA_ROUTER_MEDIA_ROUTER_UI_SERVICE_H_
+
+#include <memory>
+
+#include "chrome/browser/ui/toolbar/media_router_action_controller.h"
+#include "components/keyed_service/core/keyed_service.h"
+
+class Profile;
+
+namespace media_router {
+
+// Service that owns per-profile Media Router UI objects, such as the controller
+// for the Media Router toolbar action.
+class MediaRouterUIService : public KeyedService {
+ public:
+  explicit MediaRouterUIService(Profile* profile);
+  ~MediaRouterUIService() override;
+
+  static MediaRouterUIService* Get(Profile* profile);
+
+  MediaRouterActionController* GetActionController() const;
+
+ private:
+  std::unique_ptr<MediaRouterActionController> action_controller_;

[imcheng, 2016/09/13 23:13:09]

nit: This doesn't need to be a unique_ptr. If you are changing this to just the
plain type, then GetActionController() can be renamed action_controller().

[takumif, 2016/09/14 04:00:52]

Done. Removing GetActionController() for now, as MRAction no longer needs it.

+
+  DISALLOW_COPY_AND_ASSIGN(MediaRouterUIService);
+};
+
+}  // namespace media_router
+
+#endif  // CHROME_BROWSER_MEDIA_ROUTER_MEDIA_ROUTER_UI_SERVICE_H_