Add periodic logging of video stats.

webrtc/video/receive_statistics_proxy.cc

Index: webrtc/video/receive_statistics_proxy.cc
diff --git a/webrtc/video/receive_statistics_proxy.cc b/webrtc/video/receive_statistics_proxy.cc
index 57d1f569cfd9168783cad153ec8a4df9aa7f2398..d9b74bd1993606476f0818f80e9cd5d7d2e4e5b5 100644
--- a/webrtc/video/receive_statistics_proxy.cc
+++ b/webrtc/video/receive_statistics_proxy.cc
@@ -258,6 +258,8 @@ void ReceiveStatisticsProxy::OnRenderedFrame(int width, int height) {
   rtc::CritScope lock(&crit_);
   renders_fps_estimator_.Update(1, now);
   stats_.render_frame_rate = renders_fps_estimator_.Rate(now).value_or(0);
+  stats_.width = width;
+  stats_.height = height;
   render_width_counter_.Add(width);
   render_height_counter_.Add(height);
   render_fps_tracker_.AddSamples(1);