/usr/ is in gconf-defaults-service 3.2.6-0ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/gconf/
/usr/lib/x86_64-linux-gnu/gconf/gconf-defaults-mechanism
/usr/share/
/usr/share/polkit-1/
/usr/share/polkit-1/actions/
/usr/share/polkit-1/actions/org.gnome.gconf.defaults.policy
/usr/share/doc/
/usr/share/doc/gconf-defaults-service/
/usr/share/doc/gconf-defaults-service/copyright
/usr/share/dbus-1/
/usr/share/dbus-1/system-services/
/usr/share/dbus-1/system-services/org.gnome.GConf.Defaults.service
/usr/share/doc/gconf-defaults-service/NEWS.Debian.gz
/usr/share/doc/gconf-defaults-service/NEWS.gz
/usr/share/doc/gconf-defaults-service/AUTHORS
/usr/share/doc/gconf-defaults-service/changelog.Debian.gz
/usr/share/doc/gconf-defaults-service/README
/usr/share/doc/gconf-defaults-service/TODO