Refactor NACK bitrate allocation

webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc

Index: webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc b/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
index be8ab34a2771117680367ff7e1e4653ec4c3ab01..dbd919d0564c69ca97037d6b64044fbfacd33bf6 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
@@ -63,7 +63,8 @@ RtpRtcp::Configuration::Configuration()
       send_frame_count_observer(nullptr),
       send_side_delay_observer(nullptr),
       event_log(nullptr),
-      send_packet_observer(nullptr) {}
+      send_packet_observer(nullptr),
+      retransmission_rate_limiter(nullptr) {}
 
 RtpRtcp* RtpRtcp::CreateRtpRtcp(const RtpRtcp::Configuration& configuration) {
   if (configuration.clock) {
@@ -89,7 +90,8 @@ ModuleRtpRtcpImpl::ModuleRtpRtcpImpl(const Configuration& configuration)
                   configuration.send_frame_count_observer,
                   configuration.send_side_delay_observer,
                   configuration.event_log,
-                  configuration.send_packet_observer),
+                  configuration.send_packet_observer,
+                  configuration.retransmission_rate_limiter),
       rtcp_sender_(configuration.audio,
                    configuration.clock,
                    configuration.receive_statistics,
@@ -820,10 +822,6 @@ int32_t ModuleRtpRtcpImpl::SendREDPayloadType(int8_t* payload_type) const {
   return rtp_sender_.RED(payload_type);
 }
 
-void ModuleRtpRtcpImpl::SetTargetSendBitrate(uint32_t bitrate_bps) {
-  rtp_sender_.SetTargetBitrate(bitrate_bps);
-}
-
 int32_t ModuleRtpRtcpImpl::SetKeyFrameRequestMethod(
     const KeyFrameRequestMethod method) {
   key_frame_req_method_ = method;