GitLab

Not hooked up yet, but implements the mojo interface in terms of the old
implementation.

Bug: 872460
Change-Id: Id33e4a8f732f4bda0a2ad866e85e210962b45a05
Reviewed-on: https://chromium-review.googlesource.com/1171518Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Victor Costan <pwnall@chromium.org>
Commit-Queue: Marijn Kruisselbrink <mek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583864}