Move RTP module activation into PayloadRouter.

webrtc/video/video_send_stream.cc

Index: webrtc/video/video_send_stream.cc
diff --git a/webrtc/video/video_send_stream.cc b/webrtc/video/video_send_stream.cc
index fe4d1d903bff794a32c87b62a1f159bb581b0d00..45bf0f4b72de3ab1359411b7c4ad10954b85f5c6 100644
--- a/webrtc/video/video_send_stream.cc
+++ b/webrtc/video/video_send_stream.cc
@@ -214,6 +214,7 @@ VideoSendStream::VideoSendStream(
   RTC_DCHECK(congestion_controller_);
   RTC_DCHECK(remb_);
 
+  payload_router_.Init(rtp_rtcp_modules_);
   RTC_CHECK(vie_encoder_.Init());
   encoder_feedback_.Init(config_.rtp.ssrcs, &vie_encoder_);
   RTC_CHECK(vie_channel_.Init() == 0);
@@ -279,6 +280,9 @@ VideoSendStream::VideoSendStream(
     rtp_rtcp->RegisterRtcpStatisticsCallback(&stats_proxy_);
     rtp_rtcp->RegisterSendChannelRtpStatisticsCallback(&stats_proxy_);
     rtp_rtcp->SetMaxTransferUnit(mtu);
+    rtp_rtcp->RegisterVideoSendPayload(
+        config_.encoder_settings.payload_type,
+        config_.encoder_settings.payload_name.c_str());
   }
 
   RTC_DCHECK(config.encoder_settings.encoder != nullptr);