/usr/ is in indicator-datetime 15.10+17.10.20170829.2-0ubuntu4.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/systemd/
/usr/lib/systemd/user/
/usr/lib/systemd/user/indicator-datetime.service
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/indicator-datetime/
/usr/lib/x86_64-linux-gnu/indicator-datetime/indicator-datetime-service
/usr/share/
/usr/share/doc/
/usr/share/doc/indicator-datetime/
/usr/share/doc/indicator-datetime/changelog.Debian.gz
/usr/share/doc/indicator-datetime/copyright
/usr/share/glib-2.0/
/usr/share/glib-2.0/schemas/
/usr/share/glib-2.0/schemas/com.canonical.indicator.datetime.gschema.xml
/usr/share/unity/
/usr/share/unity/indicators/
/usr/share/unity/indicators/com.canonical.indicator.datetime
/usr/share/upstart/
/usr/share/upstart/sessions/
/usr/share/upstart/sessions/indicator-datetime.conf
/usr/share/upstart/systemd-session/
/usr/share/upstart/systemd-session/upstart/
/usr/share/upstart/systemd-session/upstart/indicator-datetime.override