GitLab

BUG=955035
TEST=Manually verify that Custom Tabs is disabled when SPM is disabled

Change-Id: I64edf464a3ab54f83460395e1c85f8febdc10f93
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1580996
Commit-Queue: Yusuke Sato <yusukes@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Yusuke Sato <yusukes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653647}