[CrOS Tether] Create the ActiveHost class, which stores metadata related to the current connection …

chromeos/components/tether/pref_names.cc

Index: chromeos/components/tether/pref_names.cc
diff --git a/chromeos/components/tether/pref_names.cc b/chromeos/components/tether/pref_names.cc
index 5ab377213a0184841d29ed20dbb4f9ad61c9cd55..888dbd3c33064569fecfb06a5217ad5402b66c01 100644
--- a/chromeos/components/tether/pref_names.cc
+++ b/chromeos/components/tether/pref_names.cc
@@ -16,6 +16,12 @@ const char kMostRecentTetherAvailablilityResponderIds[] =
 const char kMostRecentConnectTetheringResponderId[] =
     "tether.most_recent_connect_tethering_responder_ids";
 
+const char kActiveHostStatus[] = "tether.active_host_status";
+
+const char kActiveHostDeviceId[] = "tether.active_host_device_id";
+
+const char kWifiNetworkId[] = "tether.wifi_network_id";
+
 }  // namespace prefs
 
 }  // namespace tether