Disable CrSettingsSiteSettingsPageTest flaky tests

TBR=jbudorick@chromium.org

Bug: 1061249
No-Try: true
Change-Id: Ia8392d4bb8c697cea1bd04d7a67cdbbb4f571bc1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2103254
Commit-Queue: Oksana Zhuravlova <oksamyt@chromium.org>
Reviewed-by: Oksana Zhuravlova <oksamyt@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#750238}

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

@@ -1145,7 +1145,7 @@ CrSettingsSiteSettingsPageTest.prototype = {
   ])
 };
 
-TEST_F('CrSettingsSiteSettingsPageTest', 'All', function() {
+TEST_F('CrSettingsSiteSettingsPageTest', 'DISABLED_All', function() {
   mocha.run();
 });