/usr/share/xsessions/usr.desktop is in ubuntu-sugar-remix-default-settings 0.5.
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 | [Desktop Entry]
Name=Ubuntu Sugar Remix
Comment=This session logs you into Ubuntu Sugar Remix
Exec=sugar
TryExec=sugar
Icon=
Type=Application
X-Ubuntu-Gettext-Domain=sugar
|