GitLab

The tests were fixed in
https://github.com/w3c/web-platform-tests/pull/10286 and the output is
no longer flaky. Rebaselined.

TBR=foolip

Change-Id: I66e9ea8b8b169d9a3c30b4e80dd1a49c68f454a9
Reviewed-on: https://chromium-review.googlesource.com/994155Reviewed-by: Robert Ma <robertma@chromium.org>
Reviewed-by: Philip Jägenstedt <foolip@chromium.org>
Commit-Queue: Robert Ma <robertma@chromium.org>
Cr-Commit-Position: refs/heads/master@{#547861}