Add RemoteEstimatorProxy for capturing receive times

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 df5fb653a4950be8e302821910b2a36ef16629ab..523d000e6c9a544b3d06cc2bed6a544a5d2b75cc 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
@@ -768,6 +768,11 @@ RtcpStatisticsCallback* ModuleRtpRtcpImpl::GetRtcpStatisticsCallback() {
   return rtcp_receiver_.GetRtcpStatisticsCallback();
 }
 
+bool ModuleRtpRtcpImpl::SendFeedbackPacket(
+    const rtcp::TransportFeedback& packet) {
+  return rtcp_sender_.SendFeedbackPacket(packet);
+}
+
 // Send a TelephoneEvent tone using RFC 2833 (4733).
 int32_t ModuleRtpRtcpImpl::SendTelephoneEventOutband(
     const uint8_t key,