Require parent access code to change child's timezone

Bug: 921145
Change-Id: Ib40299cdebb289213cedc8e0bf3d9afdd5f28d88
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1673673
Commit-Queue: Henrique Grandinetti <hgrandinetti@chromium.org>
Reviewed-by: Michael Giuffrida <michaelpg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672227}
7 files changed