Add histogram stats for send delay for a sent video stream.

webrtc/call/call.cc

Index: webrtc/call/call.cc
diff --git a/webrtc/call/call.cc b/webrtc/call/call.cc
index 441de87ef4983fc7ee0fd0c88486d3828bbf04b5..cd4c75bfeea41201acd766ba37ce68a4289002fa 100644
--- a/webrtc/call/call.cc
+++ b/webrtc/call/call.cc
@@ -568,6 +568,11 @@ void Call::OnSentPacket(const rtc::SentPacket& sent_packet) {
   if (first_packet_sent_ms_ == -1)
     first_packet_sent_ms_ = clock_->TimeInMilliseconds();
   congestion_controller_->OnSentPacket(sent_packet);
+
+  ReadLockScoped read_lock(*send_crit_);
+  for (VideoSendStream* stream : video_send_streams_) {

[pbos-webrtc, 2015/12/07 06:06:52]

Can you somehow know which stream to deliver to here? Otherwise should these
stats be in a CallStatisticsProxy instead of per-stream?

[åsapersson, 2015/12/08 12:50:15]

No don't know which stream it belongs to here (but stats stored per ssrc in
SendStatisticsProxy).

+    stream->OnSentPacket(sent_packet.packet_id);
+  }
 }
 
 void Call::OnNetworkChanged(uint32_t target_bitrate_bps, uint8_t fraction_loss,