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diff --git a/web/core/modules/comment/src/Plugin/views/argument/UserUid.php b/web/core/modules/comment/src/Plugin/views/argument/UserUid.php
new file mode 100644
index 000000000..69621559c
--- /dev/null
+++ b/web/core/modules/comment/src/Plugin/views/argument/UserUid.php
@@ -0,0 +1,108 @@
+<?php
+
+namespace Drupal\comment\Plugin\views\argument;
+
+use Drupal\Core\Database\Connection;
+use Drupal\views\Plugin\views\argument\ArgumentPluginBase;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Argument handler to accept a user id to check for nodes that
+ * user posted or commented on.
+ *
+ * @ingroup views_argument_handlers
+ *
+ * @ViewsArgument("argument_comment_user_uid")
+ */
+class UserUid extends ArgumentPluginBase {
+
+  /**
+   * Database Service Object.
+   *
+   * @var \Drupal\Core\Database\Connection
+   */
+  protected $database;
+
+  /**
+   * Constructs a Drupal\Component\Plugin\PluginBase object.
+   *
+   * @param array $configuration
+   *   A configuration array containing information about the plugin instance.
+   * @param string $plugin_id
+   *   The plugin_id for the plugin instance.
+   * @param mixed $plugin_definition
+   *   The plugin implementation definition.
+   * @param \Drupal\Core\Database\Connection $database
+   *   Database Service Object.
+   */
+  public function __construct(array $configuration, $plugin_id, $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, $plugin_definition) {
+    return new static($configuration, $plugin_id, $plugin_definition, $container->get('database'));
+  }
+
+  public function title() {
+    if (!$this->argument) {
+      $title = \Drupal::config('user.settings')->get('anonymous');
+    }
+    else {
+      $title = $this->database->query('SELECT name FROM {users_field_data} WHERE uid = :uid AND default_langcode = 1', [':uid' => $this->argument])->fetchField();
+    }
+    if (empty($title)) {
+      return $this->t('No user');
+    }
+
+    return $title;
+  }
+
+  protected function defaultActions($which = NULL) {
+    // Disallow summary views on this argument.
+    if (!$which) {
+      $actions = parent::defaultActions();
+      unset($actions['summary asc']);
+      unset($actions['summary desc']);
+      return $actions;
+    }
+
+    if ($which != 'summary asc' && $which != 'summary desc') {
+      return parent::defaultActions($which);
+    }
+  }
+
+  public function query($group_by = FALSE) {
+    $this->ensureMyTable();
+
+    // Use the table definition to correctly add this user ID condition.
+    if ($this->table != 'comment_field_data') {
+      $subselect = $this->database->select('comment_field_data', 'c');
+      $subselect->addField('c', 'cid');
+      $subselect->condition('c.uid', $this->argument);
+
+      $entity_id = $this->definition['entity_id'];
+      $entity_type = $this->definition['entity_type'];
+      $subselect->where("c.entity_id = $this->tableAlias.$entity_id");
+      $subselect->condition('c.entity_type', $entity_type);
+
+      $condition = db_or()
+        ->condition("$this->tableAlias.uid", $this->argument, '=')
+        ->exists($subselect);
+
+      $this->query->addWhere(0, $condition);
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getSortName() {
+    return $this->t('Numerical', [], ['context' => 'Sort order']);
+  }
+
+}