Views integration for properties of type = duration does not work.

I've got a custom entity, with a property defined in hook_entity_property_info as such.

  $properties['duration'] = array(
    'label' => t('Duration'),
    'description' => t('Duration of the video in seconds'),
    'type' => 'duration',
    'schema field' => 'duration',
  );

When this gets exposed to views via EntityDefaultViewsController, the map_from_schema_info method doesn't handle properties of type = duration, so the views handlers are never set.

I can add something like the following, but I'm not sure if this is the way to go or not?

      case 'duration':
        $return += $description + array(
          'field' => array(
            'real field' => $views_field_name,
            'handler' => 'entity_views_handler_field_duration',
            'click sortable' => TRUE,
          ),
          'sort' => array(
            'real field' => $views_field_name,
            'handler' => 'views_handler_sort',
          ),
          'filter' => array(
            'real field' => $views_field_name,
            'handler' => 'views_handler_filter_numeric',
          ),
          'argument' => array(
            'real field' => $views_field_name,
            'handler' => 'views_handler_argument_numeric',
          ),
        );
        break;

To be honest I'm not 100% sure if this is a bug in the module or just a misunderstanding of how things should work.