Add average rtt to CallStatsObserver and an average rtt histogram.

webrtc/video_engine/vie_channel_group.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 53 matching lines @@
   int32_t Process() override {
     CriticalSectionScoped cs(crit_sect_.get());
     return rbe_->Process();
   }
 
   int64_t TimeUntilNextProcess() override {
     CriticalSectionScoped cs(crit_sect_.get());
     return rbe_->TimeUntilNextProcess();
   }
 
-  void OnRttUpdate(int64_t rtt) override {
+  void OnRttUpdate(int64_t avg_rtt_ms, int64_t max_rtt_ms) override {
     CriticalSectionScoped cs(crit_sect_.get());
-    rbe_->OnRttUpdate(rtt);
+    rbe_->OnRttUpdate(avg_rtt_ms, max_rtt_ms);
   }
 
   void RemoveStream(unsigned int ssrc) override {
     CriticalSectionScoped cs(crit_sect_.get());
     rbe_->RemoveStream(ssrc);
   }
 
   bool LatestEstimate(std::vector<unsigned int>* ssrcs,
                       unsigned int* bitrate_bps) const override {
     CriticalSectionScoped cs(crit_sect_.get());
@@ skipping 283 matching lines @@
     rtc::CritScope lock(&encoder_map_crit_);
     for (const auto& encoder : vie_encoder_map_)
       pad_up_to_bitrate_bps += encoder.second->GetPaddingNeededBps();
   }
   pacer_->UpdateBitrate(
       target_bitrate_bps / 1000,
       PacedSender::kDefaultPaceMultiplier * target_bitrate_bps / 1000,
       pad_up_to_bitrate_bps / 1000);
 }
 }  // namespace webrtc