mandoline filesystem: Save cookie data to the mojo:filesystem.

mojo/tools/mopy/gtest.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.
 
 import logging
 import multiprocessing
 import os
 import re
 import subprocess
 import sys
@@ skipping 112 matching lines @@
   print "\n[  FAILED  ] Command%s: %s" % (exit_code, " ".join(command_line))
   print 72 * "-"
   print error.output if hasattr(error, 'output') else error
   print 72 * "-"
 
 
 def _build_command_line(config, args, apptest):
   """Build the apptest command line. This value isn't executed on Android."""
   paths = Paths(config)
   # On Linux, always run tests with xvfb, but not for --gtest_list_tests.
-  use_xvfb = (config.target_os == Config.OS_LINUX and
-              not "--gtest_list_tests" in args)
-  prefix = [paths.xvfb, paths.build_dir] if use_xvfb else []
-  return prefix + [paths.mojo_runner] + args + [apptest]
+  not_list_tests = not "--gtest_list_tests" in args
+  use_xvfb = config.target_os == Config.OS_LINUX and not_list_tests
+  xvfb_prefix = [paths.xvfb, paths.build_dir] if use_xvfb else []
+  data_dir = ["--use-temporary-user-data-dir"] if not_list_tests else []
+  return xvfb_prefix + [paths.mojo_runner] + data_dir + args + [apptest]
 
 
 # TODO(msw): Determine proper test timeout durations (starting small).
 def _run_test_with_timeout(config, shell, args, apptest, timeout_in_seconds=10):
   """Run the given test with a timeout and return the output or an error."""
   result = multiprocessing.Queue()
   process = multiprocessing.Process(
       target=_run_test, args=(config, shell, args, apptest, result))
   process.start()
   process.join(timeout_in_seconds)
@@ skipping 10 matching lines @@
     command = _build_command_line(config, args, apptest)
     result.put(subprocess.check_output(command, stderr=subprocess.STDOUT))
     return
 
   assert shell
   (r, w) = os.pipe()
   with os.fdopen(r, "r") as rf:
     with os.fdopen(w, "w") as wf:
       shell.StartActivity('MojoShellActivity', args + [apptest], wf, wf.close)
       result.put(rf.read())