Add cros-disks user to disk, chronos-access groups.

-'disk' group is required to access block devices, and loop devices
(for testing).
-'chronos-access' group is required for cros-disks to mount files under
/home/chronos/u-<hash>/{Downloads, GCache}.

Even though this does give the cros-disks user more power, the
comparison should be made against cros-disks running as root,
which already has access to these /dev nodes.

BUG=chromium:726036
TEST=Build image, check /etc/group.
TEST=security_AccountsBaseline passes on minnie.
TEST=With CL:563738:
TEST=Run platform_CrosDisks* tests.
CQ-DEPEND=CL:571951

Change-Id: I136cf4494bd89ed87c431858bf82d795f25f4e7b
Reviewed-on: https://chromium-review.googlesource.com/571280
Commit-Ready: Jorge Lucangeli Obes <jorgelo@chromium.org>
Tested-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
2 files changed
tree: 2a2eb09907140b3896725006f9f976a619dae6e1
  1. eclass/
  2. metadata/
  3. profiles/
  4. PRESUBMIT.cfg