Propagate probing cluster id to SendTimeHistory.

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 fb17fccefce638c9ad58f894c2c39b88254acef9..15c63d10aeeed80d82ba62b5d732ff31edfa0553 100644
--- a/webrtc/audio/audio_receive_stream.cc
+++ b/webrtc/audio/audio_receive_stream.cc
@@ -235,7 +235,7 @@ bool AudioReceiveStream::DeliverRtp(const uint8_t* packet,
       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, false);

[danilchap, 2016/05/26 11:22:42]

This looks strange (may be this packet is a probe: code here can't know that)
that I wonder if it is needed.
Looking through code got an impression last parameter (was_paced) could be
removed instead of replaced.
i.e. code here should probably look like that:
remote_bitrate_estimator_->IncomingPacket(arrival_time_ms, payload_size,
header);

+                                              header, PacketInfo::kNotAProbe);
   }
 
   return channel_proxy_->ReceivedRTPPacket(packet, length, packet_time);