Update smoothed bitrate.

webrtc/modules/audio_coding/codecs/cng/audio_encoder_cng.cc

Index: webrtc/modules/audio_coding/codecs/cng/audio_encoder_cng.cc
diff --git a/webrtc/modules/audio_coding/codecs/cng/audio_encoder_cng.cc b/webrtc/modules/audio_coding/codecs/cng/audio_encoder_cng.cc
index 1beebd522dadf361c540b0a2aa6e0b5a450eb9e8..bcb11eef8b90ce2c02588658812e40c83676a944 100644
--- a/webrtc/modules/audio_coding/codecs/cng/audio_encoder_cng.cc
+++ b/webrtc/modules/audio_coding/codecs/cng/audio_encoder_cng.cc
@@ -190,9 +190,11 @@ void AudioEncoderCng::OnReceivedUplinkPacketLossFraction(
       uplink_packet_loss_fraction);
 }
 
-void AudioEncoderCng::OnReceivedTargetAudioBitrate(
-    int target_audio_bitrate_bps) {
-  speech_encoder_->OnReceivedTargetAudioBitrate(target_audio_bitrate_bps);
+void AudioEncoderCng::OnReceivedUplinkBandwidth(
+    int target_audio_bitrate_bps,
+    rtc::Optional<int64_t> probing_interval_ms) {
+  speech_encoder_->OnReceivedUplinkBandwidth(target_audio_bitrate_bps,
+                                             probing_interval_ms);
 }
 
 AudioEncoder::EncodedInfo AudioEncoderCng::EncodePassive(