Introduce struct MediaConfig, with construction-time settings.

webrtc/api/peerconnectionfactory.cc

 /*
  *  Copyright 2004 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 268 matching lines @@
 }
 
 rtc::scoped_refptr<AudioTrackInterface>
 PeerConnectionFactory::CreateAudioTrack(const std::string& id,
                                         AudioSourceInterface* source) {
   RTC_DCHECK(signaling_thread_->IsCurrent());
   rtc::scoped_refptr<AudioTrackInterface> track(AudioTrack::Create(id, source));
   return AudioTrackProxy::Create(signaling_thread_, track);
 }
 
-webrtc::MediaControllerInterface* PeerConnectionFactory::CreateMediaController()
+webrtc::MediaControllerInterface* PeerConnectionFactory::CreateMediaController(
+    const cricket::MediaConfig& config)
     const {
   RTC_DCHECK(signaling_thread_->IsCurrent());
-  return MediaControllerInterface::Create(worker_thread_,
+  return MediaControllerInterface::Create(config, worker_thread_,
                                           channel_manager_.get());
 }
 
 rtc::Thread* PeerConnectionFactory::signaling_thread() {
   // This method can be called on a different thread when the factory is
   // created in CreatePeerConnectionFactory().
   return signaling_thread_;
 }
 
 rtc::Thread* PeerConnectionFactory::worker_thread() {
   RTC_DCHECK(signaling_thread_->IsCurrent());
   return worker_thread_;
 }
 
 cricket::MediaEngineInterface* PeerConnectionFactory::CreateMediaEngine_w() {
   ASSERT(worker_thread_ == rtc::Thread::Current());
   return cricket::WebRtcMediaEngineFactory::Create(
       default_adm_.get(), video_encoder_factory_.get(),
       video_decoder_factory_.get());
 }
 
 }  // namespace webrtc