odoo_top_trending_products/views/stock_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        <record id="quant_search_view_top25_product" model="ir.ui.view">
            <field name="name">stock.quant.filter</field>
            <field name="model">stock.quant</field>
            <field name="inherit_id" ref="stock.quant_search_view"/>
            <field name="arch" type="xml">
                <xpath expr="//search" position="inside">
                    <separator/>
                    <filter string="Top Productos más vendidos" domain="[('id','!=',False)]" context="{'top_25': True}" />
                    <separator/>
                    <filter string="Top Productos más comprados" domain="[('id','!=',-1)]" context="{'top_25': True}" />
                </xpath>
            </field>
        </record>
    </data>
</openerp>