[sheriff] Disable CrSettingsSecurityPageV3Test.All on Mac.

TBR=fdoray@chromium.org

Bug: 1081908
Change-Id: I81a9cdf75492a8b3c00eaa7e6654452b4b0dff90
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2228980Reviewed-by: François Doray <fdoray@chromium.org>
Commit-Queue: François Doray <fdoray@chromium.org>
Cr-Commit-Position: refs/heads/master@{#774682}

chrome/test/data/webui/settings/cr_settings_v3_browsertest.js

@@ -501,7 +501,6 @@ TEST_F('CrSettingsAdvancedPageV3Test', 'MAYBE_Load', function() {
  ['SearchPage', 'search_page_test.js'],
  ['Search', 'search_settings_test.js'],
  ['SecurityKeysSubpage', 'security_keys_subpage_test.js'],
- ['SecurityPage', 'security_page_test.js'],
  ['SecureDns', 'secure_dns_test.js'],
  // Copied from P2 test: Disabled for flakiness, see https://crbug.com/1061249
  ['SiteData', 'site_data_test.js', 'DISABLED_All'],
@@ -530,6 +529,8 @@ GEN('#endif  // defined(OS_CHROMEOS)');
 
 GEN('#if !defined(OS_MACOSX)');
 [['EditDictionaryPage', 'edit_dictionary_page_test.js'],
+ // TODO(https://crbug.com/1081908): Flaky on Mac. Fix and re-enable.
+ ['SecurityPage', 'security_page_test.js'],
 ].forEach(test => registerTest(...test));
 GEN('#endif  //!defined(OS_MACOSX)');