Wire up currently-received video codec to stats.

webrtc/video/receive_statistics_proxy.cc

Index: webrtc/video/receive_statistics_proxy.cc
diff --git a/webrtc/video/receive_statistics_proxy.cc b/webrtc/video/receive_statistics_proxy.cc
index 6604d3de6f184ea439a825c73892e2982ffb38b7..6fc100e605b70647b125f58ce9ca06656a2b9c63 100644
--- a/webrtc/video/receive_statistics_proxy.cc
+++ b/webrtc/video/receive_statistics_proxy.cc
@@ -153,6 +153,12 @@ void ReceiveStatisticsProxy::OnFrameCountsUpdated(
   stats_.frame_counts = frame_counts;
 }
 
+void ReceiveStatisticsProxy::OnIncomingPayloadType(
+    int payload_type) {
+  rtc::CritScope lock(&crit_);
+  stats_.current_payload_type = payload_type;
+}
+
 void ReceiveStatisticsProxy::OnDiscardedPacketsUpdated(int discarded_packets) {
   rtc::CritScope lock(&crit_);
   stats_.discarded_packets = discarded_packets;