odoo/addons/report_webkit/security/ir.model.access.csv

1	id	name	model_id:id	group_id:id	perm_read	perm_write	perm_create	perm_unlink
2	access_ir_header_webkit	ir.header_webkit	model_ir_header_webkit		1		1
3	access_ir_header_img	ir.header_img	model_ir_header_img		1		1