Add average rtt to CallStatsObserver and an average rtt histogram.

webrtc/video_engine/vie_channel.h

Index: webrtc/video_engine/vie_channel.h
diff --git a/webrtc/video_engine/vie_channel.h b/webrtc/video_engine/vie_channel.h
index f18ada5d444e4ef2518eb7542853711ae37f16cd..1fc87b175fb9f9d1e73d84dd1d27346c5a9fce97 100644
--- a/webrtc/video_engine/vie_channel.h
+++ b/webrtc/video_engine/vie_channel.h
@@ -316,7 +316,7 @@ class ViEChannel : public VCMFrameTypeCallback,
   static bool ChannelDecodeThreadFunction(void* obj);
   bool ChannelDecodeProcess();
 
-  void OnRttUpdate(int64_t rtt);
+  void OnRttUpdate(int64_t avg_rtt_ms, int64_t max_rtt_ms);
 
   int ProtectionRequest(const FecProtectionParams* delta_fec_params,
                         const FecProtectionParams* key_fec_params,
@@ -483,6 +483,10 @@ class ViEChannel : public VCMFrameTypeCallback,
 
   const rtc::scoped_ptr<ReportBlockStats> report_block_stats_sender_;
 
+  int64_t time_of_first_rtt_ms_;

[åsapersson, 2015/08/07 10:15:57]

guarded by crit_

[stefan-webrtc, 2015/08/07 10:17:40]

Done.

+  int64_t rtt_sum_ms_;
+  size_t num_rtts_;
+
   // RtpRtcp modules, declared last as they use other members on construction.
   const std::vector<RtpRtcp*> rtp_rtcp_modules_;
   size_t num_active_rtp_rtcp_modules_ GUARDED_BY(crit_);