[rtp_rtcp] RTT intermidiate calculation use ntp time instead of milliseconds.

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 2c8786b906c4755f1222be95f6f2ed1b73217097..07889f9eca5b82ede8e9d7ac5f07aed5a0e42728 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
@@ -896,16 +896,6 @@ int32_t ModuleRtpRtcpImpl::SendRTCPReferencePictureSelection(
       GetFeedbackState(), kRtcpRpsi, 0, 0, false, picture_id);
 }
 
-int64_t ModuleRtpRtcpImpl::SendTimeOfSendReport(
-    const uint32_t send_report) {
-  return rtcp_sender_.SendTimeOfSendReport(send_report);
-}
-
-bool ModuleRtpRtcpImpl::SendTimeOfXrRrReport(
-    uint32_t mid_ntp, int64_t* time_ms) const {
-  return rtcp_sender_.SendTimeOfXrRrReport(mid_ntp, time_ms);
-}
-
 void ModuleRtpRtcpImpl::OnReceivedNACK(
     const std::list<uint16_t>& nack_sequence_numbers) {
   for (uint16_t nack_sequence_number : nack_sequence_numbers) {