Tether: record each type of host connection result.

chromeos/components/tether/tether_connector.h

Index: chromeos/components/tether/tether_connector.h
diff --git a/chromeos/components/tether/tether_connector.h b/chromeos/components/tether/tether_connector.h
index 5498f893b6ca6a758e0ac31f47282f408bde6946..fdcc3cf7de8d8cd0b03fba07b30379d63efc286a 100644
--- a/chromeos/components/tether/tether_connector.h
+++ b/chromeos/components/tether/tether_connector.h
@@ -20,6 +20,7 @@ class ActiveHost;
 class BleConnectionManager;
 class DeviceIdTetherNetworkGuidMap;
 class HostScanCache;
+class HostConnectionMetricsLogger;
 class NotificationPresenter;
 class TetherHostFetcher;
 class TetherHostResponseRecorder;
@@ -41,7 +42,8 @@ class TetherConnector : public ConnectTetheringOperation::Observer {
       TetherHostResponseRecorder* tether_host_response_recorder,
       DeviceIdTetherNetworkGuidMap* device_id_tether_network_guid_map,
       HostScanCache* host_scan_cache,
-      NotificationPresenter* notification_presenter);
+      NotificationPresenter* notification_presenter,
+      HostConnectionMetricsLogger* host_connection_metrics_logger);
   virtual ~TetherConnector();
 
   virtual void ConnectToNetwork(
@@ -84,6 +86,7 @@ class TetherConnector : public ConnectTetheringOperation::Observer {
   DeviceIdTetherNetworkGuidMap* device_id_tether_network_guid_map_;
   HostScanCache* host_scan_cache_;
   NotificationPresenter* notification_presenter_;
+  HostConnectionMetricsLogger* host_connection_metrics_logger_;
 
   std::string device_id_pending_connection_;
   base::Closure success_callback_;