Disable a few failing pyauto tests

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 134 matching lines @@
       # crbug.com/124913
       '-infobars.OneClickInfobarTest.testNoSameIDSigninForTwoProfiles',
       # crbug.com/124280
       '-downloads.DownloadsTest.testPauseAndResume',
       # crbug.com/137042
       '-instant.InstantTest.testFindInCanDismissInstant',
       '-instant.InstantTest.testInstantLoadsFor100CharsLongQuery',
       '-instant.InstantTest.testInstantNavigation',
       '-instant.InstantTest.testNTPCanDismissInstant',
       '-instant.InstantTest.testNewWindowCanDismissInstant',
+
+      # Mysteriously broken?
+      # crbug.com/138857
+      '-bookmarks.BookmarksTest.testAddBookmarksInMultiProfileIncognito',
+      '-bookmarks.BookmarksTest.testEditBookmarksInMultiProfileIncognito',
+      '-bookmarks.BookmarksTest.testRemoveBookmarksInMultiProfileIncognito',
+      '-flash.FlashTest.testFlashLoadsAfterKill',
+      '-infobars.InfobarTest.testPluginCrashForMultiTabs',
+      '-infobars.InfobarTest.testPluginCrashInfobar',
+      '-multiprofile.MultiprofileTest.testMakeSearchEngineDefaultInMultiprofile',
+      '-flash.FlashTest.testCanLoadFlash',
+      '-flash.FlashTest.testFlashIncognitoMode',
+      '-flash.FlashTest.testFlashWithMultipleTabs',
+      '-flash.FlashTest.testSingleFlashPluginProcess',
+      '-plugins.PluginsTest.testBlockAllPlugins',
     ],
 
     'win': [
       # Enable sync.SyncIntegrationTest only for windows CONTINUIOUS,
       # which contains the sync protobufs.
       #'sync.SyncIntegrationTest',
 
       # ==================================================
       # Disabled tests that need to be investigated/fixed.
       # ==================================================
@@ skipping 689 matching lines @@
       '-translate.TranslateTest.testBarNotVisibleOnSSLErrorPage',
       '-ntp.NTPTest.testLaunchAppFullScreen',
       '-https.SSLTest.testSSLCertOK',
       '-https.SSLTest.testSSLCertAuthorityOK',
       '-media.media_basic_playback.MediaConstrainedNetworkPerfTest.testBasicPlaybackMatrix',
       '-policy_prefs_ui.PolicyPrefsUITest.testNoUserPoliciesNoBanner',
       '-policy_prefs_ui.PolicyPrefsUITest.testToggleUserPolicyTogglesBanner',
     ],
   },
 }