Create a new depot_tools_testing_lib to move utility modules there

tests/gclient_scm_test.py

 #!/usr/bin/env python
 # Copyright (c) 2011 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.
 
 """Unit tests for gclient_scm.py."""
 
 # pylint: disable=E1103
 
 # Import before super_mox to keep valid references.
 from os import rename
 from shutil import rmtree
 from subprocess import Popen, PIPE, STDOUT
 
 import logging
 import os
 import sys
 import tempfile
 import unittest
 import __builtin__
 
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 
-from super_mox import mox, StdoutCheck, SuperMoxTestBase
-from super_mox import TestCaseUtils
+from testing_support.super_mox import mox, StdoutCheck, SuperMoxTestBase
+from testing_support.super_mox import TestCaseUtils
 
 import gclient_scm
 import subprocess2
 
 # Shortcut since this function is used often
 join = gclient_scm.os.path.join
 
 
 class GCBaseTestCase(object):
   def assertRaisesError(self, msg, fn, *args, **kwargs):
@@ skipping 930 matching lines @@
 
 if __name__ == '__main__':
   if '-v' in sys.argv:
     logging.basicConfig(
         level=logging.DEBUG,
         format='%(asctime).19s %(levelname)s %(filename)s:'
                '%(lineno)s %(message)s')
   unittest.main()
 
 # vim: ts=2:sw=2:tw=80:et: