Introduce RtpStreamReceiver and RtpStreamReceiverControllerInterface.

webrtc/video/rtp_stream_receiver.h

Index: webrtc/video/rtp_stream_receiver.h
diff --git a/webrtc/video/rtp_stream_receiver.h b/webrtc/video/rtp_stream_receiver.h
index 89fc4f6b9347a41e498edc19e31f89c8b86ff7ab..278a6591d06772ec8b88063946179d0e5636aeb5 100644
--- a/webrtc/video/rtp_stream_receiver.h
+++ b/webrtc/video/rtp_stream_receiver.h
@@ -19,6 +19,7 @@
 
 #include "webrtc/base/constructormagic.h"
 #include "webrtc/base/criticalsection.h"
+#include "webrtc/call/rtp_demuxer.h"
 #include "webrtc/modules/include/module_common_types.h"
 #include "webrtc/modules/rtp_rtcp/include/receive_statistics.h"
 #include "webrtc/modules/rtp_rtcp/include/remote_ntp_time_estimator.h"
@@ -57,6 +58,7 @@ class VideoReceiver;
 
 class RtpStreamReceiver : public RtpData,
                           public RtpFeedback,
+                          public RtpPacketSinkInterface,
                           public VCMFrameTypeCallback,
                           public VCMPacketRequestCallback,
                           public video_coding::OnReceivedFrameCallback,
@@ -95,8 +97,8 @@ class RtpStreamReceiver : public RtpData,
 
   void SignalNetworkState(NetworkState state);
 
-  // TODO(nisse): Intended to be part of an RtpPacketReceiver interface.
-  void OnRtpPacket(const RtpPacketReceived& packet);
+  // Implements RtpPacketSinkInterface.
+  void OnRtpPacket(const RtpPacketReceived& packet) override;
 
   // Implements RtpData.
   int32_t OnReceivedPayloadData(const uint8_t* payload_data,