chromium/chrome/browser/ash/dbus/org.chromium.LibvdaService.conf

<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
  "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
<!--
  Copyright 2019 The Chromium Authors
  Use of this source code is governed by a BSD-style license that can be
  found in the LICENSE file.
-->
<busconfig>
  <policy user="chronos">
    <allow own="org.chromium.LibvdaService"/>
    <allow receive_sender="org.chromium.LibvdaService"
           receive_interface="org.chromium.LibvdaService"/>
  </policy>

  <!--
    LibvdaService is used by libvda (go/libvda), which is a shared library
    providing APIs corresponding to mojom::VideoDecodeAccelerator defined in
    video_decode_accelerator.mojom.
    libvda uses this service to ask Chrome to provide a mojo connection FD.

    libvda is linked to crosvm and used from its virtio video decoder device.
    Since crosvm is run as 'crosvm' by vm_concierge or 'root' from the command
    line, we allow these users.
  -->
  <policy user="crosvm">
    <allow send_destination="org.chromium.LibvdaService"
           send_interface="org.chromium.LibvdaService"/>
  </policy>

  <policy user="root">
    <allow send_destination="org.chromium.LibvdaService"
           send_interface="org.chromium.LibvdaService"/>
  </policy>
</busconfig>