Fix markupsafe pydeps import issue.

build/android/pylib/local/device/local_device_instrumentation_test_run.py

 # Copyright 2015 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.
 
 import logging
 import os
 import posixpath
 import re
-import sys
 import tempfile
 import time
 
 from devil.android import device_errors
 from devil.android import device_temp_file
 from devil.android import flag_changer
 from devil.android.sdk import shared_prefs
 from devil.utils import reraiser_thread
 from pylib import valgrind_tools
 from pylib.android import logdog_logcat_monitor
 from pylib.base import base_test_result
 from pylib.constants import host_paths
 from pylib.instrumentation import instrumentation_test_instance
 from pylib.local.device import local_device_environment
 from pylib.local.device import local_device_test_run
 from pylib.utils import google_storage_helper
 from pylib.utils import logdog_helper
 from py_trace_event import trace_event
 from py_utils import contextlib_ext
 from py_utils import tempfile_ext
 import tombstones
 
-sys.path.append(os.path.join(host_paths.DIR_SOURCE_ROOT, 'third_party'))
-import jinja2  # pylint: disable=import-error
-import markupsafe  # pylint: disable=import-error,unused-import
+with host_paths.SysPath(
+    os.path.join(host_paths.DIR_SOURCE_ROOT, 'third_party'), 0):
+  import jinja2  # pylint: disable=import-error
+  import markupsafe  # pylint: disable=import-error,unused-import
 
 
 _JINJA_TEMPLATE_DIR = os.path.join(
     host_paths.DIR_SOURCE_ROOT, 'build', 'android', 'pylib', 'instrumentation')
 _JINJA_TEMPLATE_FILENAME = 'render_test.html.jinja'
 
 _TAG = 'test_runner_py'
 
 TIMEOUT_ANNOTATIONS = [
   ('Manual', 10 * 60 * 60),
@@ skipping 601 matching lines @@
     timeout *= cls._GetTimeoutScaleFromAnnotations(annotations)
 
     return timeout
 
 def _IsRenderTest(test):
   """Determines if a test or list of tests has a RenderTest amongst them."""
   if not isinstance(test, list):
     test = [test]
   return any([RENDER_TEST_FEATURE_ANNOTATION in t['annotations'].get(
               FEATURE_ANNOTATION, {}).get('value', ()) for t in test])