Add Stats to Stun ping.

webrtc/p2p/base/port.cc

Index: webrtc/p2p/base/port.cc
diff --git a/webrtc/p2p/base/port.cc b/webrtc/p2p/base/port.cc
index 2ee012aca0b7fee9353acbc293787146aad03e8f..e9f0392b81c1a100ab6098aee5c2e77a7173f23a 100644
--- a/webrtc/p2p/base/port.cc
+++ b/webrtc/p2p/base/port.cc
@@ -793,6 +793,8 @@ Connection::Connection(Port* port,
       send_rate_tracker_(100u, 10u),
       sent_packets_discarded_(0),
       sent_packets_total_(0),
+      sent_ping_requests_(0),
+      recv_ping_responses_(0),
       reported_(false),
       state_(STATE_WAITING),
       receiving_timeout_(WEAK_CONNECTION_RECEIVE_TIMEOUT),
@@ -1243,6 +1245,7 @@ void Connection::OnConnectionRequestResponse(ConnectionRequest* request,
   }
 
   rtt_ = (RTT_RATIO * rtt_ + rtt) / (RTT_RATIO + 1);
+  recv_ping_responses_++;
 
   MaybeAddPrflxCandidate(request, response);
 }
@@ -1291,6 +1294,7 @@ void Connection::OnConnectionRequestSent(ConnectionRequest* request) {
   LOG_JV(sev, this) << "Sent STUN ping"
                     << ", id=" << rtc::hex_encode(request->id())
                     << ", use_candidate=" << use_candidate;
+  sent_ping_requests_++;
 }
 
 void Connection::HandleRoleConflictFromPeer() {
@@ -1364,6 +1368,14 @@ size_t Connection::sent_total_packets() {
   return sent_packets_total_;
 }
 
+size_t Connection::sent_ping_requests() {
+  return sent_ping_requests_;
+}
+
+size_t Connection::recv_ping_responses() {
+  return recv_ping_responses_;
+}
+
 void Connection::MaybeAddPrflxCandidate(ConnectionRequest* request,
                                         StunMessage* response) {
   // RFC 5245