Support REMB in combination with send-side BWE.

webrtc/modules/bitrate_controller/bitrate_controller_impl.cc

Index: webrtc/modules/bitrate_controller/bitrate_controller_impl.cc
diff --git a/webrtc/modules/bitrate_controller/bitrate_controller_impl.cc b/webrtc/modules/bitrate_controller/bitrate_controller_impl.cc
index f8fd2bb987fe632155005578b8c295fdddf42f8e..da51c6ff53bd01020a33d9848bf6dc901b5d7b03 100644
--- a/webrtc/modules/bitrate_controller/bitrate_controller_impl.cc
+++ b/webrtc/modules/bitrate_controller/bitrate_controller_impl.cc
@@ -143,6 +143,15 @@ void BitrateControllerImpl::OnReceivedEstimatedBitrate(uint32_t bitrate) {
   MaybeTriggerOnNetworkChanged();
 }
 
+void BitrateControllerImpl::UpdateDelayBasedEstimate(uint32_t bitrate_bps) {
+  {
+    rtc::CritScope cs(&critsect_);
+    bandwidth_estimation_.UpdateDelayBasedEstimate(clock_->TimeInMilliseconds(),
+                                                   bitrate_bps);
+  }
+  MaybeTriggerOnNetworkChanged();
+}
+
 int64_t BitrateControllerImpl::TimeUntilNextProcess() {
   const int64_t kBitrateControllerUpdateIntervalMs = 25;
   rtc::CritScope cs(&critsect_);