some more tiny little fixes

lib/Drupal/views/Plugins/views/area/AreaPluginBase.php

@@ -98,7 +98,7 @@ function use_group_by() {
  *
  * @ingroup views_area_handlers
  */
-class views_handler_area_broken extends views_handler_area {
+class views_handler_area_broken extends AreaPluginBase {
   function ui_name($short = FALSE) {
     return t('Broken/missing handler');
   }

lib/Drupal/views/Plugins/views/argument/ArgumentPluginBase.php

@@ -1250,7 +1250,7 @@ function get_sort_name() {
  *
  * @ingroup views_argument_handlers
  */
-class views_handler_argument_broken extends views_handler_argument {
+class views_handler_argument_broken extends ArgumentPluginBase {
   function ui_name($short = FALSE) {
     return t('Broken/missing handler');
   }

lib/Drupal/views/Plugins/views/relationship/RelationshipPluginBase.php

@@ -167,7 +167,7 @@ function use_group_by() {
  *
  * @ingroup views_relationship_handlers
  */
-class views_handler_relationship_broken extends views_handler_relationship {
+class views_handler_relationship_broken extends RelationshipPluginBase {
   function ui_name($short = FALSE) {
     return t('Broken/missing handler');
   }