[IMP]Improved code as per v9 standard.

website_sale_product_brand/models/website.py

@@ -2,16 +2,16 @@
 # © 2016 Serpent Consulting Services Pvt. Ltd. (http://www.serpentcs.com)
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
-from openerp import models
+from openerp import models, api
 from openerp.http import request
 
 
 class WebSite(models.Model):
     _inherit = 'website'
 
-    def sale_product_domain(self, cr, uid, ids, context=None):
-        domain = super(WebSite, self).sale_product_domain(cr, uid, ids=ids,
-                                                          context=context)
+    @api.multi
+    def sale_product_domain(self):
+        domain = super(WebSite, self).sale_product_domain()
         if 'brand_id' in request.context:
             domain.append(
                 ('product_brand_id', '=', request.context['brand_id']))