/usr/share/glib-2.0/schemas/ is in cinnamon-settings-daemon 3.2.1-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/glib-2.0/schemas/10_cinnamon-settings-daemon.gschema.override
/usr/share/glib-2.0/schemas/org.cinnamon.settings-daemon.enums.xml
/usr/share/glib-2.0/schemas/org.cinnamon.settings-daemon.peripherals.gschema.xml
/usr/share/glib-2.0/schemas/org.cinnamon.settings-daemon.peripherals.wacom.gschema.xml
/usr/share/glib-2.0/schemas/org.cinnamon.settings-daemon.plugins.background.gschema.xml
/usr/share/glib-2.0/schemas/org.cinnamon.settings-daemon.plugins.color.gschema.xml
/usr/share/glib-2.0/schemas/org.cinnamon.settings-daemon.plugins.gschema.xml
/usr/share/glib-2.0/schemas/org.cinnamon.settings-daemon.plugins.housekeeping.gschema.xml
/usr/share/glib-2.0/schemas/org.cinnamon.settings-daemon.plugins.keyboard.gschema.xml
/usr/share/glib-2.0/schemas/org.cinnamon.settings-daemon.plugins.media-keys.gschema.xml
/usr/share/glib-2.0/schemas/org.cinnamon.settings-daemon.plugins.orientation.gschema.xml
/usr/share/glib-2.0/schemas/org.cinnamon.settings-daemon.plugins.power.gschema.xml
/usr/share/glib-2.0/schemas/org.cinnamon.settings-daemon.plugins.print-notifications.gschema.xml
/usr/share/glib-2.0/schemas/org.cinnamon.settings-daemon.plugins.xrandr.gschema.xml
/usr/share/glib-2.0/schemas/org.cinnamon.settings-daemon.plugins.xsettings.gschema.xml