/usr/share/gnome/wm-properties/compiz.desktop is in compiz-gnome 1:0.9.12.2+16.04.20160415-0ubuntu1.
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 9 10 11 12 13 14 15 | [Desktop Entry]
Type=Application
Name=Compiz
Exec=compiz
NoDisplay=true
# name of loadable control center module
X-GNOME-WMSettingsModule=compiz
# autostart phase
X-GNOME-Autostart-Phase=WindowManager
X-GNOME-Provides=windowmanager
# name we put on the WM spec check window
X-GNOME-WMName=compiz
# back compat only
X-GnomeWMSettingsLibrary=compiz
X-Ubuntu-Gettext-Domain=compiz
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