Disable testDownloadPercentage on Mac

chrome/test/functional/PYAUTO_TESTS

 # Copyright (c) 2011 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 109 matching lines @@
       '-sync.SyncTest.testPersonalStuffSyncSection',
     ],
 
     'win': [
       # ==================================================
       # Disabled tests that need to be investigated/fixed.
       # ==================================================
       # crbug.com/88210
       '-autofill.AutofillTest.testCharsStrippedForAggregatedPhoneNumbers',
       # crbug.com/81271
-      '-autofill.AutofillTest.testMergeAggregatedProfilesWithSameAddress',      
+      '-autofill.AutofillTest.testMergeAggregatedProfilesWithSameAddress',
       '-autofill.AutofillTest.testProfilesNotMergedWhenNoMinAddressData',
       # Some download test fails on win official builder, only thru buildbot
       # when downloading the small zip file.
       # crbug.com/91225
       '-find_in_page.FindMatchTests.testSearchInPDF',
       # Disabled on vista in the actual test. crbug.com/89767
       # -imports.ImportsTest.testImportFirefoxDataTwice
       # Disabled on vista in the actual test. crbug.com/89767
       # -imports.ImportsTest.testFirefoxImportFromPrefs
       # Disabled on vista in the actual test. crbug.com/89767
@@ skipping 40 matching lines @@
       # ==================================================
       # Disabled tests that need to be investigated/fixed.
       # ==================================================
       # Keychain popups make autofill/password tests difficult: crbug.com/49378
       '-autofill',
       # codesign tests should run *after* signing. crbug.com/50481
       '-codesign',
       '-crash_reporter.CrashReporterTest.testRendererCrash',  # crbug.com/69464
       # crbug.com/75724
       '-downloads.DownloadsTest.testDeclineDangerousDownload',
+      # crbug.com/94468
+      '-downloads.DownloadsTest.testDownloadPercentage',
       # crbug.com/75724
       '-downloads.DownloadsTest.testSaveDangerousFile',
       '-instant.InstantTest.testInstantNavigation',  # crbug.com/69090
       # crbug.com/93956
        '-find_in_page.FindMatchTests.testSearchInPDF',
       # crbug.com/66072
       '-notifications.NotificationsTest.testNotificationOrderAfterClosingOne',
       '-ntp.NTPTest.testLaunchAppNewWindow',  # crbug.com/79812
       # Causes browser crash.  crbug.com/93548
       '-notifications.NotificationsTest.testIncognitoNotification',
@@ skipping 304 matching lines @@
 
   # HTML5 media functional tests.
   'AV_FUNC': {
      'linux': [
        'media.media_event_simple_action',
        'media.media_event_simple_test',
        'media.media_event_track',
      ],
   },
 }