Disable many tests with flaky accessibility audits.

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

Index: chrome/browser/ui/webui/options/certificate_manager_browsertest.js
diff --git a/chrome/browser/ui/webui/options/certificate_manager_browsertest.js b/chrome/browser/ui/webui/options/certificate_manager_browsertest.js
index cb9e3d8184046fe29695e40f755d69b4dc7c3639..830de666b2ebcd96dcb075ee333d88ede77d012c 100644
--- a/chrome/browser/ui/webui/options/certificate_manager_browsertest.js
+++ b/chrome/browser/ui/webui/options/certificate_manager_browsertest.js
@@ -268,8 +268,16 @@ CertificateManagerSettingsWebUITest.prototype = {
   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']);