Add a mouse lock test to verify bubble clear when tab focus lost.

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 73 matching lines @@
       'test_pyauto',
       'themes',
 
       # ==================================================
       # Disabled tests that need to be investigated/fixed.
       # ==================================================
       # crbug.com/102798
       '-autofill.AutofillTest.testMergeAggregatedProfilesWithSameAddress',
       # crbug.com/99475
       '-autofill.AutofillTest.testNoDuplicatePhoneNumsInPrefs',
+      # crbug.com/131702
+      '-fullscreen_mouselock.FullscreenMouselockTest.testNoMLBubbleWhenTabLoseFocus',
       # crbug.com/130301
       '-fullscreen_mouselock.FullscreenMouselockTest.testMouseLockLostOnReload',
       # crbug.com/123396
       '-fullscreen_mouselock.FullscreenMouselockTest.testPatternsForFSAndML',
       # crbug.com/131874
       '-infobars.OneClickInfobarTest.testNoOneClickInfobarAfterCancel',
       # crbug.com/105560
       '-notifications',
       # crbug.com/99506
       '-notifications.NotificationsTest.testSpecialURLNotification',
@@ skipping 658 matching lines @@
     'all': [
       'media_stream_infobar',
       'webrtc_call',
 
       # Disabled tests.
       # ROAP issue: crbug.com/130531
       '-webrtc_call.WebRTCCallTest.testSimpleWebRtcRoapCall',
     ],
   },
 }