[Passwords] Reenable Password Check Tests

This change re-enables the Password Check tests. They were disabled as
part of https://crbug.com/1061249, however were never actually flaky as
described in https://crbug.com/1060948#c3.

Bug: 1060948, 1061249
Change-Id: If69270fa0b19f45b60340e5d0d823bef79e001bc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2107582
Commit-Queue: Jan Wilken Dörrie <jdoerrie@chromium.org>
Commit-Queue: Friedrich [CET] <fhorschig@chromium.org>
Auto-Submit: Jan Wilken Dörrie <jdoerrie@chromium.org>
Reviewed-by: Friedrich [CET] <fhorschig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#751085}

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

@@ -395,7 +395,7 @@ CrSettingsPasswordsCheckTest.prototype = {
   ]),
 };
 
-TEST_F('CrSettingsPasswordsCheckTest', 'DISABLED_All', function() {
+TEST_F('CrSettingsPasswordsCheckTest', 'All', function() {
   mocha.run();
 });