Disable many tests with flaky accessibility audits.

chrome/browser/ui/webui/options/certificate_manager_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.
 
 // Mac and Windows go to native certificate manager, and certificate manager
 // isn't implemented if OpenSSL is used.
 GEN('#if defined(USE_NSS_CERTS)');
 
 GEN_INCLUDE(['options_browsertest_base.js']);
 
@@ skipping 250 matching lines @@
 
 CertificateManagerSettingsWebUITest.prototype = {
   __proto__: CertificateManagerWebUITest.prototype,
 
   /**
    * Browse to the certificate manager dialog in the Settings page.
    */
   browsePreload: CERTIFICATE_MANAGER_SETTINGS_PAGE_URL,
 };
 
+
+// TODO(crbug.com/657514) Flakes on linux and chromeos.
+GEN('#if defined(OS_LINUX) || defined(OS_CHROMEOS)');
+GEN('#define MAYBE_testViewAndDeleteCert ' +
+    'DISABLED_testViewAndDeleteCert');
+GEN('#else');
+GEN('#define MAYBE_testViewAndDeleteCert testViewAndDeleteCert');
+GEN('#endif');
 TEST_F('CertificateManagerSettingsWebUITest',
-       'testViewAndDeleteCert', function() {
+       'MAYBE_testViewAndDeleteCert', function() {
   assertEquals(this.browsePreload, document.location.href);
 
   this.mockHandler.expects(once()).viewCertificate(['c1']);
 
   expectTrue($('personalCertsTab-view').disabled);
   expectTrue($('personalCertsTab-backup').disabled);
   expectTrue($('personalCertsTab-delete').disabled);
   expectFalse($('personalCertsTab-import').disabled);
   if (this.isChromeOS)
     expectFalse($('personalCertsTab-import-and-bind').disabled);
@@ skipping 113 matching lines @@
   caCertsTab.querySelector('div.tree-item').click();
   var certs = caCertsTab.querySelectorAll('div.tree-item div.tree-item');
 
   // There should be exactly three certificates displayed.
   expectEquals(certs.length, 3);
 });
 
 GEN('#endif  // defined(OS_CHROMEOS)');
 
 GEN('#endif  // defined(USE_NSS_CERTS)');