Pass time constant to bwe smoothing filter.

webrtc/modules/congestion_controller/congestion_controller.cc

Index: webrtc/modules/congestion_controller/congestion_controller.cc
diff --git a/webrtc/modules/congestion_controller/congestion_controller.cc b/webrtc/modules/congestion_controller/congestion_controller.cc
index accc1411f995487895f1ba35bb1851538c83948b..86ad275d2a9dda48e42a5b76a073efd62fc237d6 100644
--- a/webrtc/modules/congestion_controller/congestion_controller.cc
+++ b/webrtc/modules/congestion_controller/congestion_controller.cc
@@ -342,7 +342,9 @@ void CongestionController::MaybeTriggerOnNetworkChanged() {
   bitrate_bps = IsNetworkDown() || IsSendQueueFull() ? 0 : bitrate_bps;
 
   if (HasNetworkParametersToReportChanged(bitrate_bps, fraction_loss, rtt)) {
-    observer_->OnNetworkChanged(bitrate_bps, fraction_loss, rtt);
+    observer_->OnNetworkChanged(
+        bitrate_bps, fraction_loss, rtt,
+        transport_feedback_adapter_.GetProbingIntervalMs());
     remote_estimator_proxy_.OnBitrateChanged(bitrate_bps);
   }
 }