Fix get_device_configuration.py/device_utils.py

build/android/pylib/device/device_utils.py

 # Copyright 2014 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.
 
 """
 Provides a variety of device interactions based on adb.
 
 Eventually, this will be based on adb_wrapper.
 """
 
 import pylib.android_commands
 from pylib.device import adb_wrapper
 
 
 def GetAVDs():
   return pylib.android_commands.GetAVDs()
 
 
 class DeviceUtils(object):
 
   def __init__(self, device):
     self.old_interface = None
-    if isinstance(device, str):
+    if isinstance(device, basestring):
       self.old_interface = pylib.android_commands.AndroidCommands(device)
     elif isinstance(device, adb_wrapper.AdbWrapper):
       self.old_interface = pylib.android_commands.AndroidCommands(str(device))
     elif isinstance(device, pylib.android_commands.AndroidCommands):
       self.old_interface = device
     elif not device:
       self.old_interface = pylib.android_commands.AndroidCommands()