Tether: record each type of host connection result.

chromeos/components/tether/tether_disconnector_unittest.cc

Index: chromeos/components/tether/tether_disconnector_unittest.cc
diff --git a/chromeos/components/tether/tether_disconnector_unittest.cc b/chromeos/components/tether/tether_disconnector_unittest.cc
index b421426cfc1b30a4f1cb0132d89620f5a55d2b94..1ed7e7c14875b84b20116a9092684443d624765a 100644
--- a/chromeos/components/tether/tether_disconnector_unittest.cc
+++ b/chromeos/components/tether/tether_disconnector_unittest.cc
@@ -107,7 +107,8 @@ class TestTetherConnector : public TetherConnector {
                         nullptr /* tether_host_response_recorder */,
                         nullptr /* device_id_tether_network_guid_map */,
                         nullptr /* host_scan_cache */,
-                        nullptr /* notification_presenter */),
+                        nullptr /* notification_presenter */,
+                        nullptr /* host_connection_metrics_logger */),
         should_cancel_successfully_(true) {}
   ~TestTetherConnector() override {}