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

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 a4d22e469ca76191cb4e4eba0af6fbad25fe89a5..640f34d935214e303a22b34020c1192210a19f82 100644
--- a/chromeos/components/tether/initializer.h
+++ b/chromeos/components/tether/initializer.h
@@ -36,6 +36,7 @@ class ActiveHost;
 class ActiveHostNetworkStateUpdater;
 class BleConnectionManager;
 class DeviceIdTetherNetworkGuidMap;
+class HostScanCache;
 class HostScanner;
 class HostScanDevicePrioritizer;
 class LocalDeviceDataProvider;
@@ -125,6 +126,7 @@ class Initializer : public OAuth2TokenService::Observer {
   std::unique_ptr<NetworkConfigurationRemover> network_configuration_remover_;
   std::unique_ptr<TetherNetworkDisconnectionHandler>
       tether_network_disconnection_handler_;
+  std::unique_ptr<HostScanCache> host_scan_cache_;
   std::unique_ptr<HostScanner> host_scanner_;
 
   base::WeakPtrFactory<Initializer> weak_ptr_factory_;