/usr/share/upstart/sessions/unity-settings-daemon.conf is in unity-settings-daemon 15.04.1+16.04.20160209-0ubuntu1.
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 "The Unity Settings Daemon"
author "Dimitri John Ledkov <xnox@ubuntu.com>"
start on started dbus and starting gnome-session INSTANCE!=GNOME
stop on stopping gnome-session
respawn
exec /usr/lib/unity-settings-daemon/unity-settings-daemon
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