/usr/share/gnome/help/gnome-user-share/en_GB/legal.xml is in gnome-user-share 3.0.2-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/gnome/help/gnome-user-share/en_GB/../../../help-langpack/gnome-user-share/en_GB/legal.xml