[Android] Add a configurable environment for devil/.

build/android/devil/utils/mock_calls.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.
 
 """
 A test facility to assert call sequences while mocking their behavior.
 """
 
-import os
 import sys
 import unittest
 
-from pylib import constants
+from devil import devil_env
+devil_env.InitializeForTests()
 
-sys.path.append(os.path.join(
-    constants.DIR_SOURCE_ROOT, 'third_party', 'pymock'))
+sys.path.append(devil_env.instance.pymock_path)
 import mock # pylint: disable=F0401
 
 
 class TestCase(unittest.TestCase):
   """Adds assertCalls to TestCase objects."""
   class _AssertCalls(object):
     def __init__(self, test_case, expected_calls, watched):
       def call_action(pair):
         if isinstance(pair, type(mock.call)):
           return (pair, None)
@@ skipping 146 matching lines @@
     Raises:
       AssertionError if the watched targets do not receive the exact sequence
           of calls specified. Missing calls, extra calls, and calls with
           mismatching arguments, all cause the assertion to fail.
     """
     return self._AssertCalls(self, calls, self._watched)
 
   def assertCall(self, call, action=None):
     return self.assertCalls((call, action))