Fix import of some autotest cros modules, make them callable outside of autotest runtime.

client/cros/cryptohome.py

 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import logging, os, re, utils
+import logging, os, re
 import common
 import constants as chromeos_constants
-from autotest_lib.client.bin import test
+from autotest_lib.client.bin import test, utils
 from autotest_lib.client.common_lib import error
 
 
 CRYPTOHOME_CMD = '/usr/sbin/cryptohome'
 
 class ChromiumOSError(error.InstallError):
     """Generic error for ChromiumOS-specific exceptions."""
     pass
 
 
@@ skipping 68 matching lines @@
     return len(mount_parts) > 0 and re.match(device, mount_parts[0])
 
 
 def is_mounted_on_tmpfs(device = chromeos_constants.CRYPTOHOME_INCOGNITO,
                         expected_mountpt =
                             chromeos_constants.CRYPTOHOME_MOUNT_PT,
                         allow_fail = False):
     mount_parts = __get_mount_parts(device, allow_fail)
     return (len(mount_parts) > 2 and device == mount_parts[0] and
             'tmpfs' == mount_parts[2])