Issue #2020697 by heddn: Rename Views method add_filter() to addFilter().

core/modules/views/lib/Drupal/views/ManyToOneHelper.php

@@ -257,7 +257,7 @@ protected function placeholder() {
     return $this->handler->query->placeholder($this->handler->options['table'] . '_' . $this->handler->options['field']);
   }
 
-  function add_filter() {
+  public function addFilter() {
     if (empty($this->handler->value)) {
       return;
     }

core/modules/views/lib/Drupal/views/Plugin/views/argument/ManyToOne.php

@@ -132,7 +132,7 @@ public function query($group_by = FALSE) {
       $this->operator = 'or';
     }
 
-    $this->helper->add_filter();
+    $this->helper->addFilter();
   }
 
   function title() {

core/modules/views/lib/Drupal/views/Plugin/views/argument/String.php

@@ -201,7 +201,7 @@ public function query($group_by = FALSE) {
         $this->helper->formula = TRUE;
       }
       $this->helper->ensureMyTable();
-      $this->helper->add_filter();
+      $this->helper->addFilter();
       return;
     }
 

core/modules/views/lib/Drupal/views/Plugin/views/filter/ManyToOne.php

@@ -134,7 +134,7 @@ protected function opHelper() {
     if (empty($this->value)) {
       return;
     }
-    $this->helper->add_filter();
+    $this->helper->addFilter();
   }
 
 }