[Media Router] Convert to use typemaps for media_router.mojom.

chrome/browser/media/android/router/media_router_android.cc

 // Copyright 2015 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 "chrome/browser/media/android/router/media_router_android.h"
 
 #include <string>
 #include <utility>
 #include <vector>
 
@@ skipping 352 matching lines @@
   if (!request)
     return;
 
   MediaRoute route(ConvertJavaStringToUTF8(env, jmedia_route_id),
                    request->media_source,
                    ConvertJavaStringToUTF8(env, jsink_id), std::string(),
                    jis_local, std::string(),
                    true);  // TODO(avayvod): Populate for_display.
 
   std::unique_ptr<RouteRequestResult> result = RouteRequestResult::FromSuccess(
-      base::MakeUnique<MediaRoute>(route), request->presentation_id);
+      route, request->presentation_id);
   for (const MediaRouteResponseCallback& callback : request->callbacks)
     callback.Run(*result);
 
   route_requests_.Remove(jroute_request_id);
 
   active_routes_.push_back(route);
   for (auto& observer : routes_observers_)
     observer.OnRoutesUpdated(active_routes_, std::vector<MediaRoute::Id>());
 }
 
@@ skipping 68 matching lines @@
     return;
 
   std::vector<RouteMessage> messages(1);
   messages.front().type = RouteMessage::TEXT;
   messages.front().text = ConvertJavaStringToUTF8(env, jmessage);
   for (auto& observer : *it->second.get())
     observer.OnMessagesReceived(messages);
 }
 
 }  // namespace media_router