/usr/share/gconf/schemas/drivemount.schemas is in gnome-applets-data 3.5.92-0ubuntu3.
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 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 | <gconfschemafile>
    <schemalist>
        <schema>
            <key>/schemas/apps/drivemount-applet/prefs/interval</key>
            <owner>drivemount-applet</owner>
            <type>int</type>
            <default>10</default>
            <gettext_domain>gnome-applets-3.0</gettext_domain>
            <locale name="C">
                <short>Interval timeout to check mount point status</short>
                <long>Time in seconds between status updates</long>
            </locale>
        </schema>
        <schema>
            <key>/schemas/apps/drivemount-applet/prefs/pixmap</key>
            <owner>drivemount-applet</owner>
            <type>int</type>
            <default>0</default>
            <gettext_domain>gnome-applets-3.0</gettext_domain>
            <locale name="C">
                <short></short>
                <long></long>
            </locale>
        </schema>
        <schema>
            <key>/schemas/apps/drivemount-applet/prefs/scale</key>
            <owner>drivemount-applet</owner>
            <type>bool</type>
            <default>false</default>
            <gettext_domain>gnome-applets-3.0</gettext_domain>
            <locale name="C">
                <short></short>
                <long></long>
            </locale>
        </schema>
        <schema>
            <key>/schemas/apps/drivemount-applet/prefs/auto_eject</key>
            <owner>drivemount-applet</owner>
            <type>bool</type>
            <default>false</default>
            <gettext_domain>gnome-applets-3.0</gettext_domain>
            <locale name="C">
                <short></short>
                <long></long>
            </locale>
        </schema>
        <schema>
            <key>/schemas/apps/drivemount-applet/prefs/mount_point</key>
            <owner>drivemount-applet</owner>
            <type>string</type>
            <default>/mnt/floppy</default>
            <gettext_domain>gnome-applets-3.0</gettext_domain>
            <locale name="C">
                <short></short>
                <long></long>
            </locale>
        </schema>
        <schema>
            <key>/schemas/apps/drivemount-applet/prefs/autofs_friendly</key>
            <owner>drivemount-applet</owner>
            <type>bool</type>
            <default>false</default>
            <gettext_domain>gnome-applets-3.0</gettext_domain>
            <locale name="C">
                <short></short>
                <long></long>
            </locale>
        </schema>
    </schemalist>
</gconfschemafile>
 |