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

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