/usr/ is in gsettings-ubuntu-schemas 0.0.5+16.04.20160307-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/doc/
/usr/share/doc/gsettings-ubuntu-schemas/
/usr/share/doc/gsettings-ubuntu-schemas/copyright
/usr/share/doc/gsettings-ubuntu-schemas/changelog.Debian.gz
/usr/share/glib-2.0/
/usr/share/glib-2.0/schemas/
/usr/share/glib-2.0/schemas/com.ubuntu.user-interface.gschema.xml
/usr/share/glib-2.0/schemas/com.ubuntu.touch.network.gschema.xml
/usr/share/glib-2.0/schemas/com.ubuntu.sound.gschema.xml
/usr/share/glib-2.0/schemas/com.ubuntu.touch.system.gschema.xml
/usr/share/glib-2.0/schemas/com.ubuntu.phone.gschema.xml
/usr/share/glib-2.0/schemas/com.ubuntu.touch.sound.gschema.xml
/usr/share/glib-2.0/schemas/com.ubuntu.notifications.hub.gschema.xml