/usr/share/ is in gtk2-engines-cleanice 2.4.1-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/themes/
/usr/share/themes/CleanIce-Dark/
/usr/share/themes/CleanIce-Dark/gtk-2.0/
/usr/share/themes/CleanIce-Dark/gtk-2.0/gtkrc
/usr/share/themes/CleanIce/
/usr/share/themes/CleanIce/metacity-1/
/usr/share/themes/CleanIce/metacity-1/metacity-theme-1.xml
/usr/share/themes/CleanIce/gtk-2.0/
/usr/share/themes/CleanIce/gtk-2.0/gtkrc
/usr/share/themes/CleanIce-Debian/
/usr/share/themes/CleanIce-Debian/gtk-2.0/
/usr/share/themes/CleanIce-Debian/gtk-2.0/gtkrc
/usr/share/themes/CleanIce-Marble/
/usr/share/themes/CleanIce-Marble/README
/usr/share/themes/CleanIce-Marble/gtk-2.0/
/usr/share/themes/CleanIce-Marble/gtk-2.0/gtkrc
/usr/share/doc/
/usr/share/doc/gtk2-engines-cleanice/
/usr/share/doc/gtk2-engines-cleanice/README.Debian
/usr/share/doc/gtk2-engines-cleanice/copyright
/usr/share/doc/gtk2-engines-cleanice/changelog.gz
/usr/share/doc/gtk2-engines-cleanice/changelog.Debian.gz