Add Stats to Stun ping.

webrtc/p2p/base/port_unittest.cc

Index: webrtc/p2p/base/port_unittest.cc
diff --git a/webrtc/p2p/base/port_unittest.cc b/webrtc/p2p/base/port_unittest.cc
index 7e787e08eb316c24053efdcf6dc39a21891db446..8380237ff652b0d654e152bef529d9762a0dcc95 100644
--- a/webrtc/p2p/base/port_unittest.cc
+++ b/webrtc/p2p/base/port_unittest.cc
@@ -1652,7 +1652,12 @@ TEST_F(PortTest, TestSendStunMessage) {
   msg = rport->last_stun_msg();
   ASSERT_TRUE(msg != NULL);
   EXPECT_EQ(STUN_BINDING_RESPONSE, msg->type());
-
+  // Received a BINDING-RESPONSE.
+  lconn->OnReadPacket(rport->last_stun_buf()->data<char>(),
+                      rport->last_stun_buf()->size(), rtc::PacketTime());
+  // Verify the STUN Stats.
+  EXPECT_EQ(1U, lconn->sent_ping_requests());
+  EXPECT_EQ(1U, lconn->recv_ping_responses());
 
   EXPECT_FALSE(msg->IsLegacy());
   const StunAddressAttribute* addr_attr = msg->GetAddress(
@@ -1723,6 +1728,7 @@ TEST_F(PortTest, TestSendStunMessage) {
       msg->GetUInt32(STUN_ATTR_RETRANSMIT_COUNT);
   ASSERT_TRUE(retransmit_attr != NULL);
   EXPECT_EQ(2U, retransmit_attr->value());
+  EXPECT_EQ(3U, rconn->sent_ping_requests());
 
   // Respond with a BINDING-RESPONSE.
   request.reset(CopyStunMessage(msg));