Introduce RtpStreamReceiver and RtpStreamReceiverControllerInterface.

webrtc/audio/audio_receive_stream.h

Index: webrtc/audio/audio_receive_stream.h
diff --git a/webrtc/audio/audio_receive_stream.h b/webrtc/audio/audio_receive_stream.h
index d0b5a4d1cbf1464fb69ac5f916ad56a88b6fef19..852317ce2806b365931f55b950d1e8b4350861fc 100644
--- a/webrtc/audio/audio_receive_stream.h
+++ b/webrtc/audio/audio_receive_stream.h
@@ -26,6 +26,8 @@ namespace webrtc {
 class PacketRouter;
 class RtcEventLog;
 class RtpPacketReceived;
+class RtpTransportControllerReceiveInterface;
+class RtpTransportReceiver;
 
 namespace voe {
 class ChannelProxy;
@@ -39,7 +41,8 @@ class AudioReceiveStream final : public webrtc::AudioReceiveStream,
                                  public Syncable,
                                  public RtpPacketSinkInterface {
  public:
-  AudioReceiveStream(PacketRouter* packet_router,
+  AudioReceiveStream(RtpTransportControllerReceiveInterface* transport,
+                     PacketRouter* packet_router,
                      const webrtc::AudioReceiveStream::Config& config,
                      const rtc::scoped_refptr<webrtc::AudioState>& audio_state,
                      webrtc::RtcEventLog* event_log);
@@ -87,6 +90,8 @@ class AudioReceiveStream final : public webrtc::AudioReceiveStream,
 
   bool playing_ ACCESS_ON(worker_thread_checker_) = false;
 
+  std::unique_ptr<RtpTransportReceiver> rtp_transport_receiver_;
+
   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(AudioReceiveStream);
 };
 }  // namespace internal