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 2801c446461679011e091ccd5fd5af46dcb81cdf..4740c5cd5907bc0d1f3c18d4a4293cf27b476509 100644
--- a/webrtc/p2p/base/p2ptransportchannel.cc
+++ b/webrtc/p2p/base/p2ptransportchannel.cc
@@ -1034,8 +1034,14 @@ 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_total = connection->sent_ping_requests_total();
+    info.sent_ping_requests_before_first_response =
+        connection->sent_ping_requests_before_first_response();
+    info.sent_ping_responses = connection->sent_ping_responses();
     info.recv_total_bytes = connection->recv_total_bytes();
     info.recv_bytes_second = connection->recv_bytes_second();
+    info.recv_ping_requests = connection->recv_ping_requests();
+    info.recv_ping_responses = connection->recv_ping_responses();
     info.local_candidate = connection->local_candidate();
     info.remote_candidate = connection->remote_candidate();
     info.key = connection;