Updated structures and functions for setting the max bitrate limit to take rtc::Optional<int>

webrtc/media/base/rtpdataengine.cc

Index: webrtc/media/base/rtpdataengine.cc
diff --git a/webrtc/media/base/rtpdataengine.cc b/webrtc/media/base/rtpdataengine.cc
index 705ccbdaff771842e3838c6a0341299145541690..36193110fef4b5feb25a74eb0def9fd0162d22c0 100644
--- a/webrtc/media/base/rtpdataengine.cc
+++ b/webrtc/media/base/rtpdataengine.cc
@@ -139,7 +139,7 @@ bool RtpDataMediaChannel::SetSendCodecs(const std::vector<DataCodec>& codecs) {
 
 bool RtpDataMediaChannel::SetSendParameters(const DataSendParameters& params) {
   return (SetSendCodecs(params.codecs) &&
-          SetMaxSendBandwidth(params.max_bandwidth_bps));
+          SetMaxSendBandwidth(params.max_bitrate_bps));
 }
 
 bool RtpDataMediaChannel::SetRecvParameters(const DataRecvParameters& params) {
@@ -265,9 +265,10 @@ void RtpDataMediaChannel::OnPacketReceived(
   SignalDataReceived(params, data, data_len);
 }
 
-bool RtpDataMediaChannel::SetMaxSendBandwidth(int bps) {
-  if (bps <= 0) {
-    bps = kDataMaxBandwidth;
+bool RtpDataMediaChannel::SetMaxSendBandwidth(rtc::Optional<int> bitrate) {
+  int bps = kDataMaxBandwidth;
+  if (bitrate && *bitrate > 0) {
+    bps = *bitrate;
   }
   send_limiter_.reset(new rtc::RateLimiter(bps / 8, 1.0));
   LOG(LS_INFO) << "RtpDataMediaChannel::SetSendBandwidth to " << bps << "bps.";