[Android] Prepare build/android/ for catapult+devil.

build/android/test_runner.py

 #!/usr/bin/env python
 #
 # Copyright 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.
 
 """Runs all types of tests from one unified interface."""
 
 import argparse
 import collections
 import itertools
 import logging
 import os
 import signal
 import sys
 import threading
 import unittest
 
 import devil_chromium
-
 from devil import base_error
 from devil import devil_env
 from devil.android import apk_helper
 from devil.android import device_blacklist
 from devil.android import device_errors
 from devil.android import device_utils
 from devil.android import forwarder
 from devil.android import ports
 from devil.utils import reraiser_thread
 from devil.utils import run_tests_helper
 
 from pylib import constants
+from pylib.constants import host_paths
 from pylib.base import base_test_result
 from pylib.base import environment_factory
 from pylib.base import test_dispatcher
 from pylib.base import test_instance_factory
 from pylib.base import test_run_factory
 from pylib.linker import setup as linker_setup
 from pylib.host_driven import setup as host_driven_setup
 from pylib.instrumentation import setup as instrumentation_setup
 from pylib.instrumentation import test_options as instrumentation_test_options
 from pylib.junit import setup as junit_setup
 from pylib.junit import test_dispatcher as junit_dispatcher
 from pylib.monkey import setup as monkey_setup
 from pylib.monkey import test_options as monkey_test_options
 from pylib.perf import setup as perf_setup
 from pylib.perf import test_options as perf_test_options
 from pylib.perf import test_runner as perf_test_runner
 from pylib.results import json_results
 from pylib.results import report_results
 
 
 _DEVIL_STATIC_CONFIG_FILE = os.path.abspath(os.path.join(
-    constants.DIR_SOURCE_ROOT, 'build', 'android', 'devil_config.json'))
+    host_paths.DIR_SOURCE_ROOT, 'build', 'android', 'devil_config.json'))
 
 
 def AddCommonOptions(parser):
   """Adds all common options to |parser|."""
 
   group = parser.add_argument_group('Common Options')
 
   default_build_type = os.environ.get('BUILDTYPE', 'Debug')
 
   debug_or_release_group = group.add_mutually_exclusive_group()
@@ skipping 1021 matching lines @@
     if e.is_infra_error:
       return constants.INFRA_EXIT_CODE
     return constants.ERROR_EXIT_CODE
   except: # pylint: disable=W0702
     logging.exception('Unrecognized error occurred.')
     return constants.ERROR_EXIT_CODE
 
 
 if __name__ == '__main__':
   sys.exit(main())