Fix and enable testPasswordAutofilledInIncognito.

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 89 matching lines @@
       # crbug.com/123396
       '-fullscreen_mouselock.FullscreenMouselockTest.testPatternsForFSAndML',
       # crbug.com/105560
       '-notifications',
       # crbug.com/99506
       '-notifications.NotificationsTest.testSpecialURLNotification',
       # crbug.com/71715
       '-omnibox.OmniboxTest.testHistoryResult',
       # crbug.com/123019
       '-omnibox.OmniboxTest.testAutoCompleteForNonAsciiSearch',
-      # crbug.com/117720
-      '-passwords.PasswordTest.testPasswordAutofilledInIncognito',
       # crbug.com/86524
       '-plugins.PluginsTest.testAllowPluginException',
       # crbug.com/97140
       '-plugins.PluginsTest.testDisableEnableAllPlugins',
       # crbug.com/85307
       '-plugins.PluginsTest.testKillAndReloadAllPlugins',
       # crbug.com/115427
       '-policy.PolicyTest.testAlwaysAuthorizePlugins',
       # crbug.com/118054
       '-policy.PolicyTest.testApplicationLocaleValue',
@@ skipping 611 matching lines @@
 
   # WebRTC MediaStream tests. Requires webcam and audio device to be present on
   # the test machine.
   'WEBRTC': {
     'all': [
       'media_stream_infobar',
       'webrtc_call',
     ],
   },
 }