Support Bluetooth network connection type on ChromeOS.

BUG=378785

Review URL: https://codereview.chromium.org/301193002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@275473 0039d316-1c4b-4281-b951-d872f2087c98

chromeos/network/network_change_notifier_chromeos.cc

@@ -202,6 +202,8 @@ NetworkChangeNotifierChromeos::ConnectionTypeFromShill(
     return CONNECTION_WIFI;
   else if (type == shill::kTypeWimax)
     return CONNECTION_4G;
+  else if (type == shill::kTypeBluetooth)
+    return CONNECTION_BLUETOOTH;
 
   if (type != shill::kTypeCellular)
     return CONNECTION_UNKNOWN;