/usr/share/GConf/gsettings/mutter-schemas.convert is in mutter-common 3.10.4-0ubuntu2.
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 | [org.gnome.mutter]
overlay-key = /apps/mutter/general/overlay_key
attach-modal-dialogs = /apps/mutter/general/attach_modal_dialogs
workspaces-only-on-primary = /apps/mutter/general/workspaces_only_on_primary
draggable-border-width = /apps/mutter/general/draggable_border_width
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