Disable a media test: testBasicPlaybackMatrix

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 537 matching lines @@
       # ==================================================
       # crbug.com/105948
       '-autofill.AutofillTest.testDisplayLineItemForEntriesWithNoCCNum',
       '-autofill.AutofillTest.testPostalCodeAndStateLabelsBasedOnCountry',
       # crbug.com/115707
       '-browser.BrowserTest.testMaxProcess',
       # crbug.com/111289
       '-extensions.ExtensionsTest.testAllowAccessFileURLs',
       # crbug.com/113090
       '-extensions.ExtensionsTest.testAllowIncognitoExtension',
+      # crbug.com/125424
+      '-media.media_basic_playback.MediaConstrainedNetworkPerfTest.testBasicPlaybackMatrix',
       # crbug.com/115646
       '-translate.TranslateTest.testSeveralLanguages',
     ],
 
     'mac': [
       # ===========================
       # Permanently-disabled tests.
       # ===========================
       # Consistently failing on Mac QA bots only: crbug.com/97810
       '-process_count',
@@ skipping 171 matching lines @@
 
   # HTML5 media performance tests.
   'AV_PERF': {
      'linux': [
        'media.media_constrained_network_perf',
        'media.media_stat_perf',
        'media.media_seek_perf',
      ],
   },
 }