diff --git a/core/lib/Drupal/Core/Menu/LocalTaskDerivativeBase.php b/core/lib/Drupal/Core/Menu/LocalTaskDerivativeBase.php
index da6aca3..179817d 100644
--- a/core/lib/Drupal/Core/Menu/LocalTaskDerivativeBase.php
+++ b/core/lib/Drupal/Core/Menu/LocalTaskDerivativeBase.php
@@ -7,6 +7,34 @@
 
 namespace Drupal\Core\Menu;
 
-class LocalTaskDerivativeBase {
+use Drupal\Component\Plugin\Derivative\DerivativeBase;
 
-} 
+/**
+ * Provides a getPluginIdFromRoute method for local task derivatives.
+ */
+class LocalTaskDerivativeBase extends DerivativeBase {
+
+  /**
+   * Finds the local task ID of a route given the route name.
+   *
+   * @param string $route_name
+   *   The route name.
+   * @param array $local_tasks
+   *   An array of all local task definitions.
+   *
+   * @return string|null
+   *   Returns the local task ID of the given route or NULL if none is found.
+   */
+  protected function getPluginIdFromRoute($route_name, &$local_tasks) {
+    $local_task_id = NULL;
+    foreach ($local_tasks as $plugin_id => $local_task) {
+      if ($local_task['route_name'] == $route_name) {
+        $local_task_id = $plugin_id;
+        break;
+      }
+    }
+
+    return $local_task_id;
+  }
+
+}
diff --git a/core/modules/comment/comment.module b/core/modules/comment/comment.module
index 7bbf934..d889a73 100644
--- a/core/modules/comment/comment.module
+++ b/core/modules/comment/comment.module
@@ -227,6 +227,8 @@ function comment_menu_alter(&$items) {
 
 /**
  * Returns a menu title which includes the number of unapproved comments.
+ *
+ * @todo Move to the comment manager and replace by a entity query?
  */
 function comment_count_unpublished() {
   $count = db_query('SELECT COUNT(cid) FROM {comment} WHERE status = :status', array(
diff --git a/core/modules/comment/lib/Drupal/comment/Plugin/Menu/LocalTask/UnapprovedComments.php b/core/modules/comment/lib/Drupal/comment/Plugin/Menu/LocalTask/UnapprovedComments.php
index a92fe71..35d0033 100644
--- a/core/modules/comment/lib/Drupal/comment/Plugin/Menu/LocalTask/UnapprovedComments.php
+++ b/core/modules/comment/lib/Drupal/comment/Plugin/Menu/LocalTask/UnapprovedComments.php
@@ -7,61 +7,18 @@
 
 namespace Drupal\comment\Plugin\Menu\LocalTask;
 
-use Drupal\Core\Database\Connection;
 use Drupal\Core\Menu\LocalTaskDefault;
-use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
-use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
  * Provides a local task that shows the amount of unapproved comments
  */
-class UnapprovedComments extends LocalTaskDefault implements ContainerFactoryPluginInterface {
-
-  /**
-   * The database connection.
-   *
-   * @var \Drupal\Core\Database\Connection
-   */
-  protected $database;
-
-  /**
-   * Constructs a new UnapprovedComments instance.
-   *
-   * @param array $configuration
-   *   A configuration array containing information about the plugin instance.
-   * @param string $plugin_id
-   *   The plugin_id for the plugin instance.
-   * @param array $plugin_definition
-   *   The plugin implementation definition.
-   * @param \Drupal\Core\Database\Connection $database
-   *   The database connection.
-   */
-  public function __construct(array $configuration, $plugin_id, array $plugin_definition, Connection $database) {
-    parent::__construct($configuration, $plugin_id, $plugin_definition);
-
-    $this->database = $database;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public static function create(ContainerInterface $container, array $configuration, $plugin_id, array $plugin_definition) {
-    return new static(
-      $configuration,
-      $plugin_id,
-      $plugin_definition,
-      $container->get('database')
-    );
-  }
+class UnapprovedComments extends LocalTaskDefault {
 
   /**
    * {@inheritdoc}
    */
   public function getTitle() {
-    $count = $this->database->query('SELECT COUNT(cid) FROM {comment} WHERE status = :status', array(
-      ':status' => COMMENT_NOT_PUBLISHED,
-    ))->fetchField();
-    return $this->t('Unapproved comments (@count)', array('@count' => $count));
+    return comment_count_unpublished();
   }
 
 }
diff --git a/core/modules/config_translation/lib/Drupal/config_translation/Plugin/Derivative/ConfigTranslationLocalTasks.php b/core/modules/config_translation/lib/Drupal/config_translation/Plugin/Derivative/ConfigTranslationLocalTasks.php
index 7ee6e6e..c7ccba3 100644
--- a/core/modules/config_translation/lib/Drupal/config_translation/Plugin/Derivative/ConfigTranslationLocalTasks.php
+++ b/core/modules/config_translation/lib/Drupal/config_translation/Plugin/Derivative/ConfigTranslationLocalTasks.php
@@ -8,15 +8,14 @@
 namespace Drupal\config_translation\Plugin\Derivative;
 
 use Drupal\config_translation\ConfigMapperManagerInterface;
-use Drupal\Component\Plugin\Derivative\DerivativeBase;
-use Drupal\Component\Utility\Unicode;
+use Drupal\Core\Menu\LocalTaskDerivativeBase;
 use Drupal\Core\Plugin\Discovery\ContainerDerivativeInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
  * Provides dynamic local tasks for config translation.
  */
-class ConfigTranslationLocalTasks extends DerivativeBase implements ContainerDerivativeInterface {
+class ConfigTranslationLocalTasks extends LocalTaskDerivativeBase implements ContainerDerivativeInterface {
 
   /**
    * The mapper plugin discovery service.
@@ -80,7 +79,7 @@ public function alterLocalTasks(array &$local_tasks) {
       /** @var \Drupal\config_translation\ConfigMapperInterface $mapper */
       $route_name = $mapper->getOverviewRouteName();
       $translation_tab = $this->basePluginId . ':' . $route_name;
-      $tab_root_id = $this->getTaskFromRoute($mapper->getBaseRouteName(), $local_tasks);
+      $tab_root_id = $this->getPluginIdFromRoute($mapper->getBaseRouteName(), $local_tasks);
       if (!empty($tab_root_id)) {
         $local_tasks[$translation_tab]['tab_root_id'] = $tab_root_id;
       }
@@ -90,27 +89,5 @@ public function alterLocalTasks(array &$local_tasks) {
     }
   }
 
-  /**
-   * Find the local task ID of the parent route given the route name.
-   *
-   * @param string $route_name
-   *   The route name of the parent local task.
-   * @param array $local_tasks
-   *   An array of all local task definitions.
-   *
-   * @return bool|string
-   *   Returns the local task ID of the parent task, otherwise return FALSE.
-   */
-  protected function getTaskFromRoute($route_name, array &$local_tasks) {
-    $root_local_task = FALSE;
-    foreach ($local_tasks as $plugin_id => $local_task) {
-      if ($local_task['route_name'] == $route_name) {
-        $root_local_task = $plugin_id;
-        break;
-      }
-    }
-
-    return $root_local_task;
-  }
 
 }
diff --git a/core/modules/content_translation/lib/Drupal/content_translation/Plugin/Derivative/ContentTranslationLocalTasks.php b/core/modules/content_translation/lib/Drupal/content_translation/Plugin/Derivative/ContentTranslationLocalTasks.php
index 0d6e1ba..e906fd9 100644
--- a/core/modules/content_translation/lib/Drupal/content_translation/Plugin/Derivative/ContentTranslationLocalTasks.php
+++ b/core/modules/content_translation/lib/Drupal/content_translation/Plugin/Derivative/ContentTranslationLocalTasks.php
@@ -7,15 +7,15 @@
 
 namespace Drupal\content_translation\Plugin\Derivative;
 
-use Drupal\Component\Plugin\Derivative\DerivativeBase;
 use Drupal\content_translation\ContentTranslationManagerInterface;
+use Drupal\Core\Menu\LocalTaskDerivativeBase;
 use Drupal\Core\Plugin\Discovery\ContainerDerivativeInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
  * Provides dynamic local tasks for content translation.
  */
-class ContentTranslationLocalTasks extends DerivativeBase implements ContainerDerivativeInterface {
+class ContentTranslationLocalTasks extends LocalTaskDerivativeBase implements ContainerDerivativeInterface {
 
   /**
    * The base plugin ID
@@ -84,31 +84,8 @@ public function alterLocalTasks(array &$local_tasks) {
       $translation_route_name = $entity_info['links']['drupal:content-translation-overview'];
       $translation_tab = $this->basePluginId . ':' . $translation_route_name;
 
-      $local_tasks[$translation_tab]['tab_root_id'] = $this->getTaskFromRoute($entity_route_name, $local_tasks);
+      $local_tasks[$translation_tab]['tab_root_id'] = $this->getPluginIdFromRoute($entity_route_name, $local_tasks);
     }
   }
 
-  /**
-   * Find the local task ID of the parent route given the route name.
-   *
-   * @param string $route_name
-   *   The route name of the parent local task.
-   * @param array $local_tasks
-   *   An array of all local task definitions.
-   *
-   * @return bool|string
-   *   Returns the local task ID of the parent task, otherwise return FALSE.
-   */
-  protected function getTaskFromRoute($route_name, &$local_tasks) {
-    $parent_local_task = FALSE;
-    foreach ($local_tasks as $plugin_id => $local_task) {
-      if ($local_task['route_name'] == $route_name) {
-        $parent_local_task = $plugin_id;
-        break;
-      }
-    }
-
-    return $parent_local_task;
-  }
-
 }
diff --git a/core/modules/field_ui/lib/Drupal/field_ui/Plugin/Derivative/FieldUiLocalTask.php b/core/modules/field_ui/lib/Drupal/field_ui/Plugin/Derivative/FieldUiLocalTask.php
index a75a495..9a7c208 100644
--- a/core/modules/field_ui/lib/Drupal/field_ui/Plugin/Derivative/FieldUiLocalTask.php
+++ b/core/modules/field_ui/lib/Drupal/field_ui/Plugin/Derivative/FieldUiLocalTask.php
@@ -7,8 +7,8 @@
 
 namespace Drupal\field_ui\Plugin\Derivative;
 
-use Drupal\Component\Plugin\Derivative\DerivativeBase;
 use Drupal\Core\Entity\EntityManagerInterface;
+use Drupal\Core\Menu\LocalTaskDerivativeBase;
 use Drupal\Core\Plugin\Discovery\ContainerDerivativeInterface;
 use Drupal\Core\Routing\RouteProviderInterface;
 use Drupal\Core\StringTranslation\TranslationInterface;
@@ -17,7 +17,7 @@
 /**
  * Provides local task definitions for all entity bundles.
  */
-class FieldUiLocalTask extends DerivativeBase implements ContainerDerivativeInterface {
+class FieldUiLocalTask extends LocalTaskDerivativeBase implements ContainerDerivativeInterface {
 
   /**
    * The route provider.
@@ -200,29 +200,6 @@ public function alterLocalTasks(&$local_tasks) {
   }
 
   /**
-   * Finds the local task ID of a route given the route name.
-   *
-   * @param string $route_name
-   *   The route name.
-   * @param array $local_tasks
-   *   An array of all local task definitions.
-   *
-   * @return string|null
-   *   Returns the local task ID of the given route or NULL if none is found.
-   */
-  protected function getPluginIdFromRoute($route_name, &$local_tasks) {
-    $local_task_id = NULL;
-    foreach ($local_tasks as $plugin_id => $local_task) {
-      if ($local_task['route_name'] == $route_name) {
-        $local_task_id = $plugin_id;
-        break;
-      }
-    }
-
-    return $local_task_id;
-  }
-
-  /**
    * Translates a string to the current language or to a given language.
    *
    * See the t() documentation for details.
diff --git a/core/modules/views/lib/Drupal/views/Plugin/Derivative/ViewsLocalTask.php b/core/modules/views/lib/Drupal/views/Plugin/Derivative/ViewsLocalTask.php
index c97e8e4..8dcf3da 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/Derivative/ViewsLocalTask.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/Derivative/ViewsLocalTask.php
@@ -7,8 +7,8 @@
 
 namespace Drupal\views\Plugin\Derivative;
 
-use Drupal\Component\Plugin\Derivative\DerivativeBase;
 use Drupal\Core\KeyValueStore\KeyValueStoreInterface;
+use Drupal\Core\Menu\LocalTaskDerivativeBase;
 use Drupal\Core\Plugin\Discovery\ContainerDerivativeInterface;
 use Drupal\Core\Routing\RouteProviderInterface;
 use Drupal\views\Views;
@@ -17,7 +17,7 @@
 /**
  * Provides local task definitions for all views configured as local tasks.
  */
-class ViewsLocalTask extends DerivativeBase implements ContainerDerivativeInterface {
+class ViewsLocalTask extends LocalTaskDerivativeBase implements ContainerDerivativeInterface {
 
   /**
    * The route provider.
@@ -140,29 +140,6 @@ public function alterLocalTasks(&$local_tasks) {
   }
 
   /**
-   * Finds the local task ID of a route given the route name.
-   *
-   * @param string $route_name
-   *   The route name.
-   * @param array $local_tasks
-   *   An array of all local task definitions.
-   *
-   * @return string|null
-   *   Returns the local task ID of the given route or NULL if none is found.
-   */
-  protected function getPluginIdFromRoute($route_name, &$local_tasks) {
-    $local_task_id = NULL;
-    foreach ($local_tasks as $plugin_id => $local_task) {
-      if ($local_task['route_name'] == $route_name) {
-        $local_task_id = $plugin_id;
-        break;
-      }
-    }
-
-    return $local_task_id;
-  }
-
-  /**
    * Return a list of all views and display IDs that have a menu entry.
    *
    * @return array