Use new JSChecker methods in ActiveDirectoryLoginTest

Also migrating to new JSChecker methods uncovered that
some of UI was not mobile-friendly.

Bug: 940977
Change-Id: I45693fe791bd8ed52c34bd2db6b9315867494d85
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1520826
Commit-Queue: Jacob Dufault <jdufault@chromium.org>
Auto-Submit: Denis Kuznetsov <antrim@chromium.org>
Reviewed-by: Jacob Dufault <jdufault@chromium.org>
Reviewed-by: Roman Sorokin [CET] <rsorokin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#640388}
1 file changed