Motown: Define MediaRenderer and make it the way we identify renderers.

examples/media_test/media_test.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 "examples/media_test/media_test.h"
 #include "mojo/public/cpp/application/connect.h"
+#include "mojo/services/media/audio/interfaces/audio_server.mojom.h"
+#include "mojo/services/media/audio/interfaces/audio_track.mojom.h"
 #include "mojo/services/media/common/cpp/timeline.h"
 #include "mojo/services/media/common/cpp/timeline_function.h"
 #include "mojo/services/media/control/interfaces/media_factory.mojom.h"
 
 namespace mojo {
 namespace media {
 namespace examples {
 
 // static
 std::unique_ptr<MediaTest> MediaTest::Create(
     mojo::Shell* shell,
     const std::string& input_file_name) {
   return std::unique_ptr<MediaTest>(new MediaTest(shell, input_file_name));
 }
 
 MediaTest::MediaTest(mojo::Shell* shell, const std::string& input_file_name) {
   MediaFactoryPtr factory;
   ConnectToService(shell, "mojo:media_factory", GetProxy(&factory));
 
+  AudioServerPtr audio_service;
+  ConnectToService(shell, "mojo:audio_server", GetProxy(&audio_service));
+  AudioTrackPtr audio_track;
+  MediaRendererPtr audio_renderer;
+  audio_service->CreateTrack(GetProxy(&audio_track), GetProxy(&audio_renderer));
+
   SeekingReaderPtr reader;
   factory->CreateNetworkReader(input_file_name, GetProxy(&reader));
-  factory->CreatePlayer(reader.Pass(), GetProxy(&media_player_));
+
+  factory->CreatePlayer(reader.Pass(), audio_renderer.Pass(), nullptr,
+                        GetProxy(&media_player_));
 
   HandleStatusUpdates();
 }
 
 MediaTest::~MediaTest() {}
 
 int64_t MediaTest::position_ns() const {
   // Apply the timeline function to the current time.
   int64_t position = timeline_function_(Timeline::local_now());
 
@@ skipping 39 matching lines @@
   // Request a status update.
   media_player_->GetStatus(
       version, [this](uint64_t version, MediaPlayerStatusPtr status) {
         HandleStatusUpdates(version, status.Pass());
       });
 }
 
 }  // namespace examples
 }  // namespace media
 }  // namespace mojo