Form to confirm role delete operation.
function user_admin_role_delete_confirm($form, &$form_state, $role) {
$form['rid'] = array(
'#type' => 'value',
'#value' => $role->rid,
);
return confirm_form($form, t('Are you sure you want to delete the role %name ?', array(
'%name' => $role->name,
)), 'admin/people/roles', t('This action cannot be undone.'), t('Delete'));
}