/usr/share/upstart/ is in update-notifier 3.192.
This file is owned by root:root, with mode 0o755.
..
/usr/share/upstart/sessions/
/usr/share/upstart/sessions/unicast-local-avahi.conf
/usr/share/upstart/sessions/update-notifier-cds.conf
/usr/share/upstart/sessions/update-notifier-crash.conf
/usr/share/upstart/sessions/update-notifier-hp-firmware.conf
/usr/share/upstart/sessions/update-notifier-release.conf
/usr/share/upstart/systemd-session/
/usr/share/upstart/systemd-session/upstart/
/usr/share/upstart/systemd-session/upstart/unicast-local-avahi.override
/usr/share/upstart/systemd-session/upstart/update-notifier-cds.override
/usr/share/upstart/systemd-session/upstart/update-notifier-crash.override
/usr/share/upstart/systemd-session/upstart/update-notifier-hp-firmware.override
/usr/share/upstart/systemd-session/upstart/update-notifier-release.override