Use RateAccCounter for sent bitrate stats. Reports average of periodically computed stats over a ca…

webrtc/video/send_statistics_proxy.h

Index: webrtc/video/send_statistics_proxy.h
diff --git a/webrtc/video/send_statistics_proxy.h b/webrtc/video/send_statistics_proxy.h
index 934dab2f93e1f3af28d1f7f37084fcc1297b7760..90827f002783b2254177472808dd1e8b435bd8eb 100644
--- a/webrtc/video/send_statistics_proxy.h
+++ b/webrtc/video/send_statistics_proxy.h
@@ -167,6 +167,8 @@ class SendStatisticsProxy : public CpuOveruseMetricsObserver,
     void UpdateHistograms(const VideoSendStream::Config::Rtp& rtp_config,
                           const VideoSendStream::Stats& current_stats);
 
+    void InitializeBitrateCounters(const VideoSendStream::Stats& stats);
+
     const std::string uma_prefix_;
     Clock* const clock_;
     int max_sent_width_per_timestamp_;
@@ -187,6 +189,12 @@ class SendStatisticsProxy : public CpuOveruseMetricsObserver,
     rtc::RateTracker input_frame_rate_tracker_;
     RateCounter input_fps_counter_;
     RateCounter sent_fps_counter_;
+    RateAccCounter total_byte_counter_;
+    RateAccCounter media_byte_counter_;
+    RateAccCounter rtx_byte_counter_;
+    RateAccCounter padding_byte_counter_;
+    RateAccCounter retransmit_byte_counter_;
+    RateAccCounter fec_byte_counter_;
     int64_t first_rtcp_stats_time_ms_;
     int64_t first_rtp_stats_time_ms_;
     ReportBlockStats report_block_stats_;