Disable flaky test OSSettingsAdvancedPageBrowserTest.AllJsTests.

This test is flaky on linux-chromeos-rel, so disabling it for now.

TBR=hsuregan@chromium.org

Bug: 992116
Change-Id: I77512076711cac37eaefea34320475977d05fd26
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1743102Reviewed-by: Scott Little <sclittle@chromium.org>
Commit-Queue: Scott Little <sclittle@chromium.org>
Cr-Commit-Position: refs/heads/master@{#685356}

chrome/test/data/webui/settings/chromeos/os_settings_browsertest.js

@@ -113,7 +113,8 @@ var OSSettingsAdvancedPageBrowserTest = class extends OSSettingsBrowserTest {
 // Times out on debug builders because the Settings page can take several
 // seconds to load in a Release build and several times that in a Debug build.
 // See https://crbug.com/558434.
-TEST_F('OSSettingsAdvancedPageBrowserTest', 'MAYBE_AllJsTests', () => {
+// Disabled due to flakiness on linux-chromeos-rel. https://crbug.com/992116
+TEST_F('OSSettingsAdvancedPageBrowserTest', 'DISABLED_AllJsTests', () => {
   // Run all registered tests.
   mocha.run();
 });