/usr/share/upstart/sessions/click-user-hooks.conf is in click 0.4.43+16.04.20160203-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | description "Run Click user-level hooks"
author "Colin Watson <cjwatson@ubuntu.com>"
start on starting xsession-init and started dbus
task
exec /usr/bin/click hook run-user
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