GitLab

This allows us to write expectations for tests, instead of having to
modify the tests themselves (e.g. by removing a line from cts.html).
I forgot I could do this in the original patch.

Also fixes commit-queue.cfg to trigger Dawn CQ bots on appropriate files.

Bug: 984818
Change-Id: I16e708c35209137266982da1107c1f34ff72026e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1759393Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#688342}