Disable many tests with flaky accessibility audits.

chrome/browser/ui/webui/options/font_settings_browsertest.js

 // 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.
 
 GEN_INCLUDE(['options_browsertest_base.js']);
 
 /**
  * TestFixture for font settings WebUI testing.
  * @extends {testing.Test}
  * @constructor
@@ skipping 23 matching lines @@
     ];
 
     // Enable when failure is resolved.
     // AX_TEXT_01: http://crbug.com/570555
     this.accessibilityAuditConfig.ignoreSelectors(
         'controlsWithoutLabel',
         controlsWithoutLabelSelectors);
   },
 };
 
+// TODO(crbug.com/657514) Flakes on linux and chromeos.
+GEN('#if defined(OS_LINUX) || defined(OS_CHROMEOS)');
+GEN('#define MAYBE_testOpenFontSettings DISABLED_testOpenFontSettings');
+GEN('#else');
+GEN('#define MAYBE_testOpenFontSettings testOpenFontSettings');
+GEN('#endif  // defined(OS_WIN)');
 // Test opening font settings has correct location.
-TEST_F('FontSettingsWebUITest', 'testOpenFontSettings', function() {
+TEST_F('FontSettingsWebUITest', 'MAYBE_testOpenFontSettings', function() {
   assertEquals(this.browsePreload, document.location.href);
 });
 
 // Test setup of the Advanced Font Settings links.
 TEST_F('FontSettingsWebUITest', 'testAdvancedFontSettingsLink', function() {
   var installElement = $('advanced-font-settings-install');
   var optionsElement = $('advanced-font-settings-options');
   var expectedUrl = 'https://chrome.google.com/webstore/detail/' +
       'caclkomlalccbpcdllchkeecicepbmbm';
 
   FontSettings.notifyAdvancedFontSettingsAvailability(false);
   assertFalse(installElement.hidden);
   assertEquals(expectedUrl, installElement.querySelector('a').href);
   assertTrue(optionsElement.hidden);
 
   FontSettings.notifyAdvancedFontSettingsAvailability(true);
   assertTrue(installElement.hidden);
   assertFalse(optionsElement.hidden);
   this.mockHandler.expects(once()).openAdvancedFontSettingsOptions();
   optionsElement.click();
 });