GitLab

Adds test to cover the Advanced Sync Settings section of the "Manage
Sync" page.

Bug: 1125631
Change-Id: Ic4cde0a1bc03e111a71dc5a04bf3c3865ba1941e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2507550
Commit-Queue: Nohemi Fernandez <fernandex@chromium.org>
Reviewed-by: Jérôme Lebel <jlebel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#823200}