Add Stats to Stun ping.

webrtc/p2p/base/p2ptransportchannel.cc

Index: webrtc/p2p/base/p2ptransportchannel.cc
diff --git a/webrtc/p2p/base/p2ptransportchannel.cc b/webrtc/p2p/base/p2ptransportchannel.cc
index acbcfd77e7165281e43588b4f7ce21dc2bf1f025..85b32d2001abbf7e918dace94b0917d1b7b59e7f 100644
--- a/webrtc/p2p/base/p2ptransportchannel.cc
+++ b/webrtc/p2p/base/p2ptransportchannel.cc
@@ -1018,8 +1018,10 @@ bool P2PTransportChannel::GetStats(ConnectionInfos *infos) {
     info.sent_bytes_second = connection->sent_bytes_second();
     info.sent_discarded_packets = connection->sent_discarded_packets();
     info.sent_total_packets = connection->sent_total_packets();
+    info.sent_ping_requests = connection->sent_ping_requests();
     info.recv_total_bytes = connection->recv_total_bytes();
     info.recv_bytes_second = connection->recv_bytes_second();
+    info.recv_ping_responses = connection->recv_ping_responses();
     info.local_candidate = connection->local_candidate();
     info.remote_candidate = connection->remote_candidate();
     info.key = connection;