WIP: Move the creation of AudioCodecFactory into PeerConnectionFactory.

webrtc/api/peerconnectionfactory.h

Index: webrtc/api/peerconnectionfactory.h
diff --git a/webrtc/api/peerconnectionfactory.h b/webrtc/api/peerconnectionfactory.h
index 1992087f7591e8fbf10609d8cb8d0850c5ddb10e..f26f9694b9575b6847fc2310292c3cec902db3eb 100644
--- a/webrtc/api/peerconnectionfactory.h
+++ b/webrtc/api/peerconnectionfactory.h
@@ -99,6 +99,7 @@ class PeerConnectionFactory : public PeerConnectionFactoryInterface {
       rtc::Thread* worker_thread,
       rtc::Thread* signaling_thread,
       AudioDeviceModule* default_adm,
+      std::shared_ptr<webrtc::AudioDecoderFactory> audio_decoder_factory,
       cricket::WebRtcVideoEncoderFactory* video_encoder_factory,
       cricket::WebRtcVideoDecoderFactory* video_decoder_factory);
   virtual ~PeerConnectionFactory();
@@ -113,6 +114,7 @@ class PeerConnectionFactory : public PeerConnectionFactoryInterface {
   Options options_;
   // External Audio device used for audio playback.
   rtc::scoped_refptr<AudioDeviceModule> default_adm_;
+  std::shared_ptr<AudioDecoderFactory> audio_decoder_factory_;
   std::unique_ptr<cricket::ChannelManager> channel_manager_;
   // External Video encoder factory. This can be NULL if the client has not
   // injected any. In that case, video engine will use the internal SW encoder.