Ignore inter-frame delay stats samples when stream is inactive

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 59d193377aed62c7fff10683ad62f8ff82b09b5c..cafed17544498fb7aa460ffaf74fc97cd577019e 100644
--- a/webrtc/video/video_receive_stream.cc
+++ b/webrtc/video/video_receive_stream.cc
@@ -528,6 +528,8 @@ bool VideoReceiveStream::Decode() {
     // To avoid spamming keyframe requests for a stream that is not active we
     // check if we have received a packet within the last 5 seconds.
     bool stream_is_active = last_packet_ms && now_ms - *last_packet_ms < 5000;
+    if (!stream_is_active)
+      stats_proxy_.OnStreamInactive();
 
     // If we recently have been receiving packets belonging to a keyframe then
     // we assume a keyframe is currently being received.