Wire up bandwidth limitation info to GetStats and adapt_reason.

webrtc/video/send_statistics_proxy.cc

Index: webrtc/video/send_statistics_proxy.cc
diff --git a/webrtc/video/send_statistics_proxy.cc b/webrtc/video/send_statistics_proxy.cc
index 57d38a523b664a0ffcd4d074f80a0f8dd09df422..f5e7e3d0243fd16f2ad0cd0d1db898143372e711 100644
--- a/webrtc/video/send_statistics_proxy.cc
+++ b/webrtc/video/send_statistics_proxy.cc
@@ -258,6 +258,10 @@ void SendStatisticsProxy::OnSendEncodedImage(
   uma_container_->key_frame_counter_.Add(encoded_image._frameType ==
                                          kVideoFrameKey);
 
+  stats_.bw_limited_resolution =
+      encoded_image.adapt_reason_.quality_resolution_downscales > 0 ||
+      encoded_image.adapt_reason_.bw_resolutions_disabled > 0;
+
   if (encoded_image.adapt_reason_.quality_resolution_downscales != -1) {
     bool downscaled =
         encoded_image.adapt_reason_.quality_resolution_downscales > 0;