Add PeerConnectionInterface::UpdateCallBitrate.

webrtc/pc/peerconnection.cc

Index: webrtc/pc/peerconnection.cc
diff --git a/webrtc/pc/peerconnection.cc b/webrtc/pc/peerconnection.cc
index a3981039e6cfe89554092b4c14d7f2f7b0f175e4..012489d75c5ce9200b7c2ba12058c4258c6b0049 100644
--- a/webrtc/pc/peerconnection.cc
+++ b/webrtc/pc/peerconnection.cc
@@ -1235,6 +1235,26 @@ void PeerConnection::RegisterUMAObserver(UMAObserver* observer) {
   }
 }
 
+void PeerConnection::SetCallBitrate(const BitrateParameters& bitrate) {
+  factory_->worker_thread()->Invoke<void>(
+      RTC_FROM_HERE,
+      rtc::Bind(&PeerConnection::SetCallBitrate_w, this, bitrate));
+}
+
+void PeerConnection::SetCallBitrate_w(const BitrateParameters& bitrate) {
+  Call::Config::BitrateConfigMask mask;
+  mask.min_bitrate_bps = bitrate.min_bitrate_bps;
+  mask.start_bitrate_bps = bitrate.start_bitrate_bps;
+  mask.max_bitrate_bps = bitrate.max_bitrate_bps;
+
+  if (media_controller_) {
+    Call* call = media_controller_->call_w();
+    call->SetBitrateConfigMask(mask);
+  } else {
+    LOG_F(LS_ERROR) << "media_controller_ is NULL.";

[Taylor Brandstetter, 2017/04/12 01:33:42]

Is this ever expected to happen? If not, you can just
"RTC_DCHECK(media_controller_)".

[Zach Stein, 2017/04/13 00:26:36]

Done.

+  }
+}
+
 bool PeerConnection::StartRtcEventLog(rtc::PlatformFile file,
                                       int64_t max_size_bytes) {
   return factory_->worker_thread()->Invoke<bool>(