Add instrumentation to track the IceEndpointType.

talk/app/webrtc/webrtcsession_unittest.cc

Index: talk/app/webrtc/webrtcsession_unittest.cc
diff --git a/talk/app/webrtc/webrtcsession_unittest.cc b/talk/app/webrtc/webrtcsession_unittest.cc
index de10bc40a8b432ba79a248d4a55b112f29f0d2e0..afb0e412a874414cf283c20b69ef45717d93280e 100644
--- a/talk/app/webrtc/webrtcsession_unittest.cc
+++ b/talk/app/webrtc/webrtcsession_unittest.cc
@@ -1005,12 +1005,20 @@ class WebRtcSessionTest : public testing::Test {
    private:
     void Verify(const rtc::scoped_refptr<FakeMetricsObserver> metrics_observer,
                 const ExpectedBestConnection& expected) const {
-      EXPECT_EQ(
-          metrics_observer->GetCounter(webrtc::kBestConnections_IPv4),
-          expected.ipv4_count_);
-      EXPECT_EQ(
-          metrics_observer->GetCounter(webrtc::kBestConnections_IPv6),
-          expected.ipv6_count_);
+      EXPECT_EQ(metrics_observer->GetCounter(
+                    webrtc::kPeerConnectionEnumCounter_AddressFamily,
+                    webrtc::kBestConnections_IPv4),
+                expected.ipv4_count_);
+      EXPECT_EQ(metrics_observer->GetCounter(
+                    webrtc::kPeerConnectionEnumCounter_AddressFamily,
+                    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->GetCounter(
+                    webrtc::kPeerConnectionEnumCounter_IceCandidatePairTypeUdp,
+                    webrtc::kIceCandidatePair_Host_Host),
+                1);
     }
   };