Fix pyauto functional tests on chromeos

chrome/test/functional/PYAUTO_TESTS

 # 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.
 #
 # This file lists the pyauto tests that run as a part of the functional test
 # suite.
 #
 # Tests can be enabled on a per-platform basis. Tests not listed here will
 # not be run.
 #
@@ skipping 275 matching lines @@
       '-multiprofile',
       # These require a custom setup on ChromeOS and have their own suite for
       # this platform.
       '-policy',
       '-policy_prefs_ui',
       # No Protector on ChromeOS.
       '-protector',
       # No Web Driver test for ChromeOS.
       '-about_plugins_ui',
       # You cannot adjust the downloads directory on ChromeOS.
-      '-prefs.PrefsTest.testDownloadDirPref'
+      '-prefs.PrefsTest.testDownloadDirPref',
 
       # ==================================================
       # Disabled tests that need to be investigated/fixed.
       # ==================================================
       # crosbug.com/19556
       '-autofill.AutofillTest.testDisplayLineItemForEntriesWithNoCCNum',
       '-autofill.AutofillTest.testPostalCodeAndStateLabelsBasedOnCountry',
       # Downloads panel stays even after declining a download.
       # crosbug.com/14728
       '-downloads.DownloadsTest.testDeclineDangerousDownload',
@@ skipping 341 matching lines @@
     ],
   },
 
   # HTML5 media performance tests.
   'AV_PERF': {
      'linux': [
        'media.media_constrained_network_perf',
      ],
   },
 }