Introduce struct MediaConfig, with construction-time settings.

webrtc/api/peerconnectionfactory.h

 /*
  *  Copyright 2011 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 52 matching lines @@
 
   rtc::scoped_refptr<AudioTrackInterface>
       CreateAudioTrack(const std::string& id,
                        AudioSourceInterface* audio_source) override;
 
   bool StartAecDump(rtc::PlatformFile file, int64_t max_size_bytes) override;
   void StopAecDump() override;
   bool StartRtcEventLog(rtc::PlatformFile file) override;
   void StopRtcEventLog() override;
 
-  virtual webrtc::MediaControllerInterface* CreateMediaController() const;
+  virtual webrtc::MediaControllerInterface* CreateMediaController(
+      const cricket::MediaConfig& config) const;
   virtual rtc::Thread* signaling_thread();
   virtual rtc::Thread* worker_thread();
   const Options& options() const { return options_; }
 
  protected:
   PeerConnectionFactory();
   PeerConnectionFactory(
       rtc::Thread* worker_thread,
       rtc::Thread* signaling_thread,
       AudioDeviceModule* default_adm,
@@ skipping 22 matching lines @@
       video_decoder_factory_;
   rtc::scoped_ptr<rtc::BasicNetworkManager> default_network_manager_;
   rtc::scoped_ptr<rtc::BasicPacketSocketFactory> default_socket_factory_;
 
   rtc::scoped_refptr<RefCountedDtlsIdentityStore> dtls_identity_store_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_API_PEERCONNECTIONFACTORY_H_