GitLab

This CL includes a new Mojo service for controlling the
ContainedShell, as well as a feature flag for enabling it.

Bug: 902571
Change-Id: I645643270a5e595a0cadb6f781f400d700ae3bed
Reviewed-on: https://chromium-review.googlesource.com/c/1323718
Commit-Queue: Quan Nguyen <qnnguyen@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Dominick Ng <dominickn@chromium.org>
Reviewed-by: Michael Giuffrida <michaelpg@chromium.org>
Reviewed-by: Jacob Dufault <jdufault@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612304}