It is used only inside vcl, and it should stay that way.

Change-Id: Ia1a14ab13cb7d3580771c880f959abb2b695b032
Reviewed-on: https://gerrit.libreoffice.org/44698Reviewed-by: Tor Lillqvist <tml@collabora.com>
Tested-by: Tor Lillqvist <tml@collabora.com>