Disable ntp.NTPTest.testCloseOneTab test.

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 113 matching lines @@
       '-prefs_ui.PrefsUITest.testDeleteExceptionUI',
       # crbug.com/151973
       '-prefs_ui.PrefsUITest.testInitialLineEntryInIncognitoUI',
       # crbug.com/162341
       '-prefs_ui.PrefsUITest.testLocationSettingOptionsUI',
       '-prefs_ui.PrefsUITest.testNoInitialLineEntryInUI',
       # crbug.com/132285
       '-special_tabs.SpecialTabsTest.testSpecialURLTabs',
       # crbug.com/88593
       '-sync.SyncTest.testPersonalStuffSyncSection',
+      # crbug.com/168081
+      '-ntp.NTPTest.testCloseOneTab',
     ],
 
     'win': [
       'gpu',
 
       # ===========================
       # Permanently-disabled tests.
       # ===========================
 
       # ==================================================
@@ skipping 445 matching lines @@
       '-search_engines.SearchEnginesTest.testDiscoverSearchEngine',
       '-ntp.NTPTest.testUninstallApp',
       '-ntp.NTPTest.testLaunchAppWithDefaultSettings',
       '-ntp.NTPTest.testLaunchAppRegularTab',
       '-ntp.NTPTest.testLaunchAppPinnedTab',
       '-ntp.NTPTest.testGetAppsWhenInstallApp',
       '-ntp.NTPTest.testLaunchAppNewWindow',
     ],
   },
 }