Add instrumentation to track the IceEndpointType.

talk/app/webrtc/webrtcsession_unittest.cc

 /*
  * libjingle
  * Copyright 2012 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 991 matching lines @@
 
     void VerifyBestConnectionAfterIceConverge(
         const rtc::scoped_refptr<FakeMetricsObserver> metrics_observer) const {
       Verify(metrics_observer, best_connection_after_initial_ice_converged_);
     }
 
    private:
     void Verify(const rtc::scoped_refptr<FakeMetricsObserver> metrics_observer,
                 const ExpectedBestConnection& expected) const {
       EXPECT_EQ(
-          metrics_observer->GetCounter(webrtc::kBestConnections_IPv4),
+          metrics_observer->GetEnumCounter(webrtc::kEnumCounterAddressFamily,
+                                           webrtc::kBestConnections_IPv4),
           expected.ipv4_count_);
       EXPECT_EQ(
-          metrics_observer->GetCounter(webrtc::kBestConnections_IPv6),
+          metrics_observer->GetEnumCounter(webrtc::kEnumCounterAddressFamily,
+                                           webrtc::kBestConnections_IPv6),
           expected.ipv6_count_);
+      // This is used in the loopback call so there is only single host to host
+      // candidate pair.
+      EXPECT_EQ(metrics_observer->GetEnumCounter(
+                    webrtc::kEnumCounterIceCandidatePairTypeUdp,
+                    webrtc::kIceCandidatePairHostHost),
+                1);
     }
   };
 
   class LoopbackNetworkManager {
    public:
     LoopbackNetworkManager(WebRtcSessionTest* session,
                            const LoopbackNetworkConfiguration& config)
         : config_(config) {
       session->AddInterface(
           rtc::SocketAddress(kClientAddrHost1, kClientAddrPort));
@@ skipping 2917 matching lines @@
     // terminated.  The offer creation may or may not have succeeded, but we
     // must have received a notification which, so the only invalid state
     // is kInit.
     EXPECT_NE(WebRtcSessionCreateSDPObserverForTest::kInit, o->state());
   }
 }
 
 // TODO(bemasc): Add a TestIceStatesBundle with BUNDLE enabled.  That test
 // currently fails because upon disconnection and reconnection OnIceComplete is
 // called more than once without returning to IceGatheringGathering.