Only update VCMTiming on every received frame instead of every received packet.

webrtc/video/rtp_stream_receiver.cc

Index: webrtc/video/rtp_stream_receiver.cc
diff --git a/webrtc/video/rtp_stream_receiver.cc b/webrtc/video/rtp_stream_receiver.cc
index 8777535a25abb3f98e0b6d80e0a509383666f3d8..c9cb73cd5c1426f955b7969f8554b6e4d636c3c3 100644
--- a/webrtc/video/rtp_stream_receiver.cc
+++ b/webrtc/video/rtp_stream_receiver.cc
@@ -256,7 +256,6 @@ int32_t RtpStreamReceiver::OnReceivedPayloadData(
       ntp_estimator_.Estimate(rtp_header->header.timestamp);
   if (jitter_buffer_experiment_) {
     VCMPacket packet(payload_data, payload_size, rtp_header_with_ntp);
-    timing_->IncomingTimestamp(packet.timestamp, clock_->TimeInMilliseconds());
     packet.timesNacked = nack_module_->OnReceivedPacket(packet);
 
     if (packet.codec == kVideoCodecH264) {
@@ -413,6 +412,8 @@ int32_t RtpStreamReceiver::ResendPackets(const uint16_t* sequence_numbers,
 
 void RtpStreamReceiver::OnReceivedFrame(
     std::unique_ptr<video_coding::RtpFrameObject> frame) {
+  if (!frame->delayed_by_retransmission())
+    timing_->IncomingTimestamp(frame->timestamp, clock_->TimeInMilliseconds());
   reference_finder_->ManageFrame(std::move(frame));
 }