[Android] Fix device handling in adb_reverse_forwarder.py.

build/android/adb_reverse_forwarder.py

 #!/usr/bin/env python
 #
 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Command line tool for forwarding ports from a device to the host.
 
 Allows an Android device to connect to services running on the host machine,
 i.e., "adb forward" in reverse. Requires |host_forwarder| and |device_forwarder|
@@ skipping 43 matching lines @@
   try:
     port_pairs = [int(a) for a in args[1:]]
     port_pairs = zip(port_pairs[::2], port_pairs[1::2])
   except ValueError:
     parser.error('Bad port number')
     sys.exit(1)
 
   blacklist = (device_blacklist.Blacklist(options.blacklist_file)
                if options.blacklist_file
                else None)
-  device = device_utils.DeviceUtils.HealthyDevices(blacklist=blacklist,
-                                                   device_arg=options.device)
+  device = device_utils.DeviceUtils.HealthyDevices(
+      blacklist=blacklist, device_arg=options.device)[0]
   constants.SetBuildType(options.build_type)
   try:
     forwarder.Forwarder.Map(port_pairs, device)
     while True:
       time.sleep(60)
   except KeyboardInterrupt:
     sys.exit(0)
   finally:
     forwarder.Forwarder.UnmapAllDevicePorts(device)
 
 if __name__ == '__main__':
   main(sys.argv)