/usr/share/compizconfig/upgrades/com.canonical.unity.unity.01.upgrade 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 | [core]
-s0_active_plugins = staticswitcher
[unityshell]
+s0_alt_tab_timeout = true
|