[chromeos] pyauto tests should auto login by default on chromeos

chrome/test/functional/chromeos_login.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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 os
 import subprocess
 import sys
 
 import pyauto_functional  # Must be imported before pyauto
 import pyauto
 import pyauto_errors
 import test_utils
 
 
 sys.path.append('/usr/local')  # To make autotest libs importable.
 from autotest.cros import cros_ui
 from autotest.cros import cryptohome
 
 
 class ChromeosLogin(pyauto.PyUITest):
   """TestCases for Logging into ChromeOS."""
 
   assert os.geteuid() == 0, 'Need to run this test as root'
 
+  def ShouldAutoLogin(self):
+    return False
+
   def setUp(self):
     # We want a clean session_manager instance for every run,
     # so restart ui now.
     cros_ui.stop(allow_fail=True)
     cryptohome.remove_all_vaults()
     cros_ui.start(wait_for_login_prompt=False)
     pyauto.PyUITest.setUp(self)
 
   def _ValidCredentials(self, account_type='test_google_account'):
     """Obtains a valid username and password from a data file.
@@ skipping 209 matching lines @@
         msg='Could not find "help_advanced" in help output.')
 
     # Exit crosh and close tab.
     self.SendKeysToHterm('exit\\n')
     self.WaitForHtermText(text='command crosh completed with exit code 0',
         msg='Could not exit crosh.')
 
 
 if __name__ == '__main__':
   pyauto_functional.Main()