Tether: record each type of host connection result.

chromeos/components/tether/initializer.h

Index: chromeos/components/tether/initializer.h
diff --git a/chromeos/components/tether/initializer.h b/chromeos/components/tether/initializer.h
index a1b69446d5ed40d5baac6383035ac83a15455b46..f2e2978ef2ccf1d4d38b09d04304d74a0fd81d77 100644
--- a/chromeos/components/tether/initializer.h
+++ b/chromeos/components/tether/initializer.h
@@ -44,6 +44,7 @@ class HostScanner;
 class HostScanScheduler;
 class HostScanDevicePrioritizerImpl;
 class KeepAliveScheduler;
+class HostConnectionMetricsLogger;
 class NetworkConfigurationRemover;
 class NotificationPresenter;
 class TetherConnector;
@@ -121,6 +122,7 @@ class Initializer : public OAuth2TokenService::Observer {
   std::unique_ptr<BleConnectionManager> ble_connection_manager_;
   std::unique_ptr<TetherHostResponseRecorder> tether_host_response_recorder_;
   std::unique_ptr<HostScanDevicePrioritizerImpl> host_scan_device_prioritizer_;
+  std::unique_ptr<HostConnectionMetricsLogger> host_connection_metrics_logger_;
   std::unique_ptr<WifiHotspotConnector> wifi_hotspot_connector_;
   std::unique_ptr<ActiveHost> active_host_;
   std::unique_ptr<ActiveHostNetworkStateUpdater>