[CrOS Tether] Create HostScanCache, which caches scan results and inserts them into the network sta…

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 f27621fc5dee7cd1229888bce53dfac700ab7b7f..a09b0744d2b0d0e51282086eaa4a6354bd1f4ba1 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_scan_cache.h"
 #include "chromeos/components/tether/host_scan_device_prioritizer.h"
 #include "chromeos/components/tether/host_scan_scheduler.h"
 #include "chromeos/components/tether/host_scanner.h"
@@ -206,11 +207,15 @@ void Initializer::OnBluetoothAdapterAdvertisingIntervalSet(
       base::MakeUnique<TetherNetworkDisconnectionHandler>(
           active_host_.get(), network_state_handler_,
           network_configuration_remover_.get());
+  host_scan_cache_ = base::MakeUnique<HostScanCache>(
+      network_state_handler_, active_host_.get(),
+      tether_host_response_recorder_.get(),
+      device_id_tether_network_guid_map_.get());
   host_scanner_ = base::MakeUnique<HostScanner>(
       tether_host_fetcher_.get(), ble_connection_manager_.get(),
       host_scan_device_prioritizer_.get(), tether_host_response_recorder_.get(),
-      network_state_handler_, notification_presenter_.get(),
-      device_id_tether_network_guid_map_.get());
+      notification_presenter_.get(), device_id_tether_network_guid_map_.get(),
+      host_scan_cache_.get());
 
   // TODO(khorimoto): Hook up HostScanScheduler. Currently, we simply start a
   // new scan once the user logs in.