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

services/media/factory_service/audio_track_controller.cc

-// 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.
-
-#include <list>
-
-#include "base/bind_helpers.h"
-#include "base/logging.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 "services/media/factory_service/audio_track_controller.h"
-#include "services/media/framework_mojo/mojo_type_conversions.h"
-
-namespace mojo {
-namespace media {
-
-AudioTrackController::AudioTrackController(const String& url, Shell* shell) {
-  // TODO(dalesat): Handle connection errors.
-  DCHECK(shell);
-
-  AudioServerPtr audio_server;
-  ConnectToService(shell, url, GetProxy(&audio_server));
-  audio_server->CreateTrack(GetProxy(&audio_track_));
-}
-
-AudioTrackController::~AudioTrackController() {}
-
-void AudioTrackController::GetSupportedMediaTypes(
-    const GetSupportedMediaTypesCallback& callback) {
-  // Query the track's format capabilities.
-  audio_track_->Describe([this, callback](AudioTrackDescriptorPtr descriptor) {
-    callback(descriptor->supported_media_types.To<std::unique_ptr<
-                 std::vector<std::unique_ptr<media::StreamTypeSet>>>>());
-  });
-}
-
-void AudioTrackController::Configure(
-    const std::unique_ptr<StreamType>& stream_type,
-    const ConfigureCallback& callback) {
-  AudioTrackConfigurationPtr config = AudioTrackConfiguration::New();
-  config->media_type = MediaType::From(stream_type);
-
-  MediaConsumerPtr consumer;
-  audio_track_->Configure(config.Pass(), GetProxy(&consumer));
-
-  callback(consumer.Pass());
-}
-
-void AudioTrackController::GetTimelineControlSite(
-    InterfaceRequest<MediaTimelineControlSite> req) {
-  audio_track_->GetTimelineControlSite(req.Pass());
-}
-
-}  // namespace media
-}  // namespace mojo