Revert of Remove audio/video distinction for probe packets.

webrtc/audio/audio_receive_stream.cc

Index: webrtc/audio/audio_receive_stream.cc
diff --git a/webrtc/audio/audio_receive_stream.cc b/webrtc/audio/audio_receive_stream.cc
index a684003326426fb792a896816b4cb2550ad63d89..c933f78ea2b9c6d8574261755980b4f5302bf6ae 100644
--- a/webrtc/audio/audio_receive_stream.cc
+++ b/webrtc/audio/audio_receive_stream.cc
@@ -254,7 +254,7 @@
       arrival_time_ms = (packet_time.timestamp + 500) / 1000;
     size_t payload_size = length - header.headerLength;
     remote_bitrate_estimator_->IncomingPacket(arrival_time_ms, payload_size,
-                                              header);
+                                              header, false);
   }
 
   return channel_proxy_->ReceivedRTPPacket(packet, length, packet_time);