/usr/share/gtk-doc/ is in upower-doc 0.9.23-2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gtk-doc/html/
/usr/share/gtk-doc/html/UPower/
/usr/share/gtk-doc/html/UPower/Device.html
/usr/share/gtk-doc/html/UPower/KbdBacklight.html
/usr/share/gtk-doc/html/UPower/QoS.html
/usr/share/gtk-doc/html/UPower/UPower-up-client.html
/usr/share/gtk-doc/html/UPower/UPower-up-device.html
/usr/share/gtk-doc/html/UPower/UPower-up-history-item.html
/usr/share/gtk-doc/html/UPower/UPower-up-qos-item.html
/usr/share/gtk-doc/html/UPower/UPower-up-stats-item.html
/usr/share/gtk-doc/html/UPower/UPower-up-types.html
/usr/share/gtk-doc/html/UPower/UPower-up-wakeup-item.html
/usr/share/gtk-doc/html/UPower/UPower.7.html
/usr/share/gtk-doc/html/UPower/UPower.devhelp2
/usr/share/gtk-doc/html/UPower/UPower.html
/usr/share/gtk-doc/html/UPower/annotation-glossary.html
/usr/share/gtk-doc/html/UPower/home.png
/usr/share/gtk-doc/html/UPower/index.html
/usr/share/gtk-doc/html/UPower/index.sgml
/usr/share/gtk-doc/html/UPower/ix01.html
/usr/share/gtk-doc/html/UPower/left.png
/usr/share/gtk-doc/html/UPower/libupower-glib-helpers.html
/usr/share/gtk-doc/html/UPower/libupower-glib.html
/usr/share/gtk-doc/html/UPower/license.html
/usr/share/gtk-doc/html/UPower/ref-dbus.html
/usr/share/gtk-doc/html/UPower/right.png
/usr/share/gtk-doc/html/UPower/style.css
/usr/share/gtk-doc/html/UPower/tools-fileformats.html
/usr/share/gtk-doc/html/UPower/up.png
/usr/share/gtk-doc/html/UPower/upower.1.html
/usr/share/gtk-doc/html/UPower/upowerd.8.html