web/web_widget_darkroom/demo/res_users.xml

<?xml version="1.0" encoding="utf-8"?>

<!--
    Copyright 2016 LasLabs Inc.
    License LGPL-3 or later (http://www.gnu.org/licenses/lgpl.html).
-->

<openerp>
    <data>
        <record id="view_users_form" model="ir.ui.view">
            <field name="name">res.users.form.darkroom</field>
            <field name="model">res.users</field>
            <field name="inherit_id" ref="base.view_users_form" />
            <field name="arch" type="xml">
                <xpath expr="//notebook" position="inside">
                    <page string="Darkroom">
                        <field name="image" widget="darkroom" />
                    </page>
                </xpath>
            </field>
        </record>
    </data>
</openerp>