Parse FlexFEC RTP headers in Call and add integration with BWE.

webrtc/video/video_receive_stream.cc

Index: webrtc/video/video_receive_stream.cc
diff --git a/webrtc/video/video_receive_stream.cc b/webrtc/video/video_receive_stream.cc
index 1a4edeb1661eeb99078c7a0e5e2702568de4adcd..d76bbfb838cbfdbea0f4b05707e3af734312953e 100644
--- a/webrtc/video/video_receive_stream.cc
+++ b/webrtc/video/video_receive_stream.cc
@@ -22,6 +22,7 @@
 #include "webrtc/common_video/h264/profile_level_id.h"
 #include "webrtc/common_video/libyuv/include/webrtc_libyuv.h"
 #include "webrtc/modules/congestion_controller/include/congestion_controller.h"
+#include "webrtc/modules/rtp_rtcp/source/rtp_header_extension.h"
 #include "webrtc/modules/utility/include/process_thread.h"
 #include "webrtc/modules/video_coding/frame_object.h"
 #include "webrtc/modules/video_coding/include/video_coding.h"
@@ -37,16 +38,6 @@
 
 namespace webrtc {
 
-static bool UseSendSideBwe(const VideoReceiveStream::Config& config) {
-  if (!config.rtp.transport_cc)
-    return false;
-  for (const auto& extension : config.rtp.extensions) {
-    if (extension.uri == RtpExtension::kTransportSequenceNumberUri)
-      return true;
-  }
-  return false;
-}
-
 std::string VideoReceiveStream::Decoder::ToString() const {
   std::stringstream ss;
   ss << "{decoder: " << (decoder ? "(VideoDecoder)" : "nullptr");
@@ -209,7 +200,9 @@ VideoReceiveStream::VideoReceiveStream(
       rtp_stream_receiver_(
           &video_receiver_,
           congestion_controller_->GetRemoteBitrateEstimator(
-              UseSendSideBwe(config_)),
+              CongestionController::UseSendSideBwe(
+                  config_.rtp.transport_cc,
+                  RtpHeaderExtensionMap(config_.rtp.extensions))),
           &transport_adapter_,
           call_stats_->rtcp_rtt_stats(),
           congestion_controller_->pacer(),
@@ -263,7 +256,10 @@ VideoReceiveStream::~VideoReceiveStream() {
   process_thread_->DeRegisterModule(&rtp_stream_sync_);
   process_thread_->DeRegisterModule(&video_receiver_);
 
-  congestion_controller_->GetRemoteBitrateEstimator(UseSendSideBwe(config_))
+  congestion_controller_
+      ->GetRemoteBitrateEstimator(CongestionController::UseSendSideBwe(
+          config_.rtp.transport_cc,
+          RtpHeaderExtensionMap(config_.rtp.extensions)))
       ->RemoveStream(rtp_stream_receiver_.GetRemoteSsrc());
 }