/usr/share/dbus-1/services/org.gnome.Xchat.service is in xchat-gnome-common 1:0.30.0~git20141005.816798-0ubuntu9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | [D-BUS Service]
Name=org.gnome.Xchat
Exec=/usr/bin/xchat-gnome
|