ash/dbus/org.chromium.PrivacyScreenService.conf

<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
  "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
<!--
  Copyright 2021 The Chromium Authors. All rights reserved.
  Use of this source code is governed by a BSD-style license that can be
  found in the LICENSE file.

  This file will be installed at /opt/google/chrome/dbus on Chromium OS.
-->
<busconfig>
  <policy user="chronos">
    <allow own="org.chromium.PrivacyScreenService"/>
  </policy>

  <!-- powerd runs as power -->
  <policy user="power">
    <allow send_destination="org.chromium.PrivacyScreenService"
           send_interface="org.chromium.PrivacyScreenService"/>
  </policy>

  <!-- frecon runs as root, for manual testing -->
  <policy user="root">
    <allow send_destination="org.chromium.PrivacyScreenService"
           send_interface="org.chromium.PrivacyScreenService"/>
  </policy>
</busconfig>