/usr/ is in unity-2d-common 5.12.0-0ubuntu1.1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/apport/
/usr/share/apport/package-hooks/
/usr/share/
/usr/share/gconf/
/usr/share/gconf/ubuntu-2d.mandatory.path
/usr/share/gconf/ubuntu-2d/
/usr/share/gconf/ubuntu-2d/default/
/usr/share/gconf/ubuntu-2d/default/20_ubuntu-2d-gconf-default
/usr/share/gconf/ubuntu-2d/mandatory/
/usr/share/gconf/ubuntu-2d/mandatory/20_ubuntu-2d-gconf-mandatory
/usr/share/gconf/ubuntu-2d.default.path
/usr/share/glib-2.0/
/usr/share/glib-2.0/schemas/
/usr/share/glib-2.0/schemas/com.canonical.Unity2d.gschema.xml
/usr/share/doc/
/usr/share/doc/unity-2d-common/
/usr/share/doc/unity-2d-common/copyright
/usr/share/doc/unity-2d-common/changelog.Debian.gz
/usr/share/apport/package-hooks/unity-2d.py