GitLab

Far from complete, but a little more standard and now using layout XMLs,
like the rest of the code.

BUG=1002262

Change-Id: I2f9334fab4fc46374b76606d1e5acc29232a6793
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2511973Reviewed-by: Martin Kreichgauer <martinkr@google.com>
Commit-Queue: Adam Langley <agl@chromium.org>
Cr-Commit-Position: refs/heads/master@{#823353}