Tether: record each type of host connection result.

chromeos/components/tether/initializer.cc

Index: chromeos/components/tether/initializer.cc
diff --git a/chromeos/components/tether/initializer.cc b/chromeos/components/tether/initializer.cc
index 258360478f94a442baad8103d8b1cea40aa09576..7ebafd7b78d30f53737b03244a4f516e9ba202f0 100644
--- a/chromeos/components/tether/initializer.cc
+++ b/chromeos/components/tether/initializer.cc
@@ -9,6 +9,7 @@
 #include "chromeos/components/tether/active_host_network_state_updater.h"
 #include "chromeos/components/tether/ble_connection_manager.h"
 #include "chromeos/components/tether/device_id_tether_network_guid_map.h"
+#include "chromeos/components/tether/host_connection_metrics_logger.h"
 #include "chromeos/components/tether/host_scan_device_prioritizer_impl.h"
 #include "chromeos/components/tether/host_scan_scheduler.h"
 #include "chromeos/components/tether/host_scanner.h"
@@ -214,12 +215,14 @@ void Initializer::OnBluetoothAdapterAdvertisingIntervalSet(
       host_scan_cache_.get(), clock_.get());
   host_scan_scheduler_ = base::MakeUnique<HostScanScheduler>(
       network_state_handler_, host_scanner_.get());
+  host_connection_metrics_logger_ =
+      base::MakeUnique<HostConnectionMetricsLogger>();
   tether_connector_ = base::MakeUnique<TetherConnector>(
       network_state_handler_, wifi_hotspot_connector_.get(), active_host_.get(),
       tether_host_fetcher_.get(), ble_connection_manager_.get(),
       tether_host_response_recorder_.get(),
       device_id_tether_network_guid_map_.get(), host_scan_cache_.get(),
-      notification_presenter_.get());
+      notification_presenter_.get(), host_connection_metrics_logger_.get());
   network_configuration_remover_ =
       base::MakeUnique<NetworkConfigurationRemover>(
           network_state_handler_, managed_network_configuration_handler_);