diff --git a/core/modules/aggregator/aggregator.views.inc b/core/modules/aggregator/aggregator.views.inc
new file mode 100644
index 0000000..a610253
--- /dev/null
+++ b/core/modules/aggregator/aggregator.views.inc
@@ -0,0 +1,358 @@
+<?php
+
+/**
+ * @file
+ * Provide views data and handlers for aggregator.module.
+ *
+ * @ingroup views_module_handlers
+ */
+
+/**
+ * Implements hook_views_data().
+ */
+function aggregator_views_data() {
+  // Main Aggregator Item base table
+
+  // Define the base group of this table. Fields that don't
+  // have a group defined will go into this field by default.
+  $data['aggregator_item']['table']['group']  = t('Aggregator');
+
+  // Advertise this table as a possible base table
+  $data['aggregator_item']['table']['base'] = array(
+    'field' => 'iid',
+    'title' => t('Aggregator item'),
+    'help' => t("Aggregator items are imported from external RSS and Atom news feeds."),
+  );
+
+  // Fields
+
+  // iid
+  $data['aggregator_item']['iid'] = array(
+    'title' => t('Item ID'),
+    'help' => t('The unique ID of the aggregator item.'), // The help that appears on the UI,
+    // Information for displaying the iid
+    'field' => array(
+      'id' => 'numeric',
+      'click sortable' => TRUE,
+    ),
+    // Information for accepting a iid as an argument
+    'argument' => array(
+      'id' => 'aggregator_iid',
+      'name field' => 'title', // the field to display in the summary.
+      'numeric' => TRUE,
+    ),
+    // Information for accepting a nid as a filter
+    'filter' => array(
+      'id' => 'numeric',
+    ),
+    // Information for sorting on a nid.
+    'sort' => array(
+      'id' => 'standard',
+    ),
+  );
+
+  // title
+  $data['aggregator_item']['title'] = array(
+    'title' => t('Title'), // The item it appears as on the UI,
+    'help' => t('The title of the aggregator item.'),
+     // Information for displaying a title as a field
+    'field' => array(
+      'id' => 'aggregator_title_link',
+      'extra' => array('link'),
+      'click sortable' => TRUE,
+     ),
+    'sort' => array(
+      'id' => 'standard',
+    ),
+    // Information for accepting a title as a filter
+    'filter' => array(
+      'id' => 'string',
+    ),
+  );
+
+  // link
+  $data['aggregator_item']['link'] = array(
+    'title' => t('Link'), // The item it appears as on the UI,
+    'help' => t('The link to the original source URL of the item.'),
+    'field' => array(
+      'id' => 'url',
+      'click sortable' => TRUE,
+     ),
+    'sort' => array(
+      'id' => 'standard',
+    ),
+    // Information for accepting a title as a filter
+    'filter' => array(
+      'id' => 'string',
+    ),
+  );
+
+  // author
+  $data['aggregator_item']['author'] = array(
+    'title' => t('Author'), // The item it appears as on the UI,
+    'help' => t('The author of the original imported item.'),
+     // Information for displaying a title as a field
+    'field' => array(
+      'id' => 'aggregator_xss',
+      'click sortable' => TRUE,
+     ),
+    'sort' => array(
+      'id' => 'standard',
+    ),
+    // Information for accepting a title as a filter
+    'filter' => array(
+      'id' => 'string',
+    ),
+    'argument' => array(
+      'id' => 'string',
+    ),
+  );
+
+  // guid
+  $data['aggregator_item']['guid'] = array(
+    'title' => t('GUID'), // The item it appears as on the UI,
+    'help' => t('The guid of the original imported item.'),
+     // Information for displaying a title as a field
+    'field' => array(
+      'id' => 'xss',
+      'click sortable' => TRUE,
+     ),
+    'sort' => array(
+      'id' => 'standard',
+    ),
+    // Information for accepting a title as a filter
+    'filter' => array(
+      'id' => 'string',
+    ),
+    'argument' => array(
+      'id' => 'string',
+    ),
+  );
+
+  // feed body
+  $data['aggregator_item']['description'] = array(
+    'title' => t('Body'), // The item it appears as on the UI,
+    'help' => t('The actual content of the imported item.'),
+     // Information for displaying a title as a field
+    'field' => array(
+      'id' => 'aggregator_xss',
+      'click sortable' => FALSE,
+     ),
+    // Information for accepting a title as a filter
+    'filter' => array(
+      'id' => 'string',
+    ),
+  );
+
+  // item timestamp
+  $data['aggregator_item']['timestamp'] = array(
+    'title' => t('Timestamp'), // The item it appears as on the UI,
+    'help' => t('The date the original feed item was posted. (With some feeds, this will be the date it was imported.)'),
+     // Information for displaying a title as a field
+    'field' => array(
+      'id' => 'date',
+      'click sortable' => TRUE,
+     ),
+    'sort' => array(
+      'id' => 'date',
+    ),
+    // Information for accepting a title as a filter
+    'filter' => array(
+      'id' => 'date',
+    ),
+    'argument' => array(
+      'id' => 'date',
+    ),
+  );
+
+  // Aggregator feed table
+
+  $data['aggregator_feed']['table']['group']  = t('Aggregator feed');
+
+  // Explain how this table joins to others.
+  $data['aggregator_feed']['table']['join'] = array(
+    'aggregator_item' => array(
+      'left_field' => 'fid',
+      'field' => 'fid',
+    ),
+  );
+
+  // fid
+  $data['aggregator_feed']['fid'] = array(
+    'title' => t('Feed ID'),
+    'help' => t('The unique ID of the aggregator feed.'), // The help that appears on the UI,
+    // Information for displaying the fid
+    'field' => array(
+      'id' => 'numeric',
+      'click sortable' => TRUE,
+    ),
+    // Information for accepting a fid as an argument
+    'argument' => array(
+      'id' => 'aggregator_fid',
+      'name field' => 'title', // the field to display in the summary.
+      'numeric' => TRUE,
+    ),
+    // Information for accepting a nid as a filter
+    'filter' => array(
+      'id' => 'numeric',
+    ),
+    // Information for sorting on a fid.
+    'sort' => array(
+      'id' => 'standard',
+    ),
+  );
+
+  // title
+  $data['aggregator_feed']['title'] = array(
+    'title' => t('Title'), // The item it appears as on the UI,
+    'help' => t('The title of the aggregator feed.'),
+     // Information for displaying a title as a field
+    'field' => array(
+      'id' => 'aggregator_title_link',
+      'extra' => array('link'),
+      'click sortable' => TRUE,
+     ),
+    'sort' => array(
+      'id' => 'standard',
+    ),
+    // Information for accepting a title as a filter
+    'filter' => array(
+      'id' => 'string',
+    ),
+    'argument' => array(
+      'id' => 'string',
+    ),
+  );
+
+  // link
+  $data['aggregator_feed']['link'] = array(
+    'title' => t('Link'), // The item it appears as on the UI,
+    'help' => t('The link to the source URL of the feed.'),
+     // Information for displaying a title as a field
+    'field' => array(
+      'id' => 'url',
+      'click sortable' => TRUE,
+     ),
+    'sort' => array(
+      'id' => 'standard',
+    ),
+    'filter' => array(
+      'id' => 'string',
+    ),
+  );
+
+  // feed last updated
+  $data['aggregator_feed']['checked'] = array(
+    'title' => t('Last checked'), // The item it appears as on the UI,
+    'help' => t('The date the feed was last checked for new content.'),
+     // Information for displaying a title as a field
+    'field' => array(
+      'id' => 'date',
+      'click sortable' => TRUE,
+     ),
+    'sort' => array(
+      'id' => 'date',
+    ),
+    'filter' => array(
+      'id' => 'date',
+    ),
+    'argument' => array(
+      'id' => 'date',
+    ),
+  );
+
+  // feed description
+  $data['aggregator_feed']['description'] = array(
+    'title' => t('Description'), // The item it appears as on the UI,
+    'help' => t('The description of the aggregator feed.'),
+     // Information for displaying a title as a field
+    'field' => array(
+      'id' => 'xss',
+      'click sortable' => FALSE,
+     ),
+    'filter' => array(
+      'id' => 'string',
+    ),
+  );
+
+  // feed last updated
+  $data['aggregator_feed']['modified'] = array(
+    'title' => t('Last modified'), // The item it appears as on the UI,
+    'help' => t('The date of the most recent new content on the feed.'),
+     // Information for displaying a title as a field
+    'field' => array(
+      'id' => 'date',
+      'click sortable' => TRUE,
+     ),
+    'sort' => array(
+      'id' => 'date',
+    ),
+    // Information for accepting a title as a filter
+    'filter' => array(
+      'id' => 'date',
+    ),
+    'argument' => array(
+      'id' => 'date',
+    ),
+  );
+
+  // Aggregator category feed table
+
+  $data['aggregator_category_feed']['table']['join'] = array(
+    'aggregator_item' => array(
+      'left_field' => 'fid',
+      'field' => 'fid',
+    ),
+  );
+
+  // Aggregator category table
+
+  $data['aggregator_category']['table']['group'] = t('Aggregator category');
+
+  $data['aggregator_category']['table']['join'] = array(
+    'aggregator_item' => array(
+      'left_table' => 'aggregator_category_feed',
+      'left_field' => 'cid',
+      'field' => 'cid',
+    ),
+  );
+
+  // cid
+  $data['aggregator_category']['cid'] = array(
+    'title' => t('Category ID'),
+    'help' => t('The unique ID of the aggregator category.'),
+    'field' => array(
+      'id' => 'numeric',
+      'click sortable' => TRUE,
+    ),
+    'argument' => array(
+      'id' => 'aggregator_category_cid',
+      'name field' => 'title',
+      'numeric' => TRUE,
+    ),
+    'filter' => array(
+      'id' => 'aggregator_category_cid',
+    ),
+    'sort' => array(
+      'id' => 'standard',
+    ),
+  );
+
+  // title
+  $data['aggregator_category']['title'] = array(
+    'title' => t('Category'),
+    'help' => t('The title of the aggregator category.'),
+    'field' => array(
+      'id' => 'aggregator_category',
+      'click sortable' => TRUE,
+     ),
+    'sort' => array(
+      'id' => 'standard',
+    ),
+    'filter' => array(
+      'id' => 'string',
+    ),
+  );
+
+  return $data;
+}
diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/argument/CategoryCid.php b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/argument/CategoryCid.php
new file mode 100644
index 0000000..8454377
--- /dev/null
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/argument/CategoryCid.php
@@ -0,0 +1,41 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\aggregator\Plugin\views\argument\CategoryCid.
+ */
+
+namespace Drupal\aggregator\Plugin\views\argument;
+
+use Drupal\views\Plugin\views\argument\Numeric;
+use Drupal\Core\Annotation\Plugin;
+
+/**
+ * Argument handler to accept an aggregator category id.
+ *
+ * @ingroup views_argument_handlers
+ *
+ * @Plugin(
+ *   id = "aggregator_category_cid",
+ *   module = "aggregator"
+ * )
+ */
+class CategoryCid extends Numeric {
+
+  /**
+   * Override the behavior of title(). Get the title of the category.
+   */
+  function title_query() {
+    $titles = array();
+
+    $query = db_select('aggregator_category', 'c');
+    $query->addField('c', 'title');
+    $query->condition('c.cid', $this->value);
+    $result = $query->execute();
+    foreach ($result as $term) {
+      $titles[] = check_plain($term->title);
+    }
+    return $titles;
+  }
+
+}
diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/argument/Fid.php b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/argument/Fid.php
new file mode 100644
index 0000000..2c4aaf4
--- /dev/null
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/argument/Fid.php
@@ -0,0 +1,42 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\aggregator\Plugin\views\argument\Fid.
+ */
+
+namespace Drupal\aggregator\Plugin\views\argument;
+
+use Drupal\views\Plugin\views\argument\Numeric;
+use Drupal\Core\Annotation\Plugin;
+
+/**
+ * Argument handler to accept an aggregator feed id.
+ *
+ * @ingroup views_argument_handlers
+ *
+ * @Plugin(
+ *   id = "aggregator_fid",
+ *   module = "aggregator"
+ * )
+ */
+class Fid extends Numeric {
+
+  /**
+   * Override the behavior of title(). Get the title of the feed.
+   */
+  function title_query() {
+    $titles = array();
+
+    $result = db_query("SELECT f.title FROM {aggregator_feed} f WHERE f.fid IN (:fids)", array(':fids' => $this->value));
+    $query = db_select('aggregator_feed', 'f');
+    $query->addField('f', 'title');
+    $query->condition('f.fid', $this->value);
+    $result = $query->execute();
+    foreach ($result as $term) {
+      $titles[] = check_plain($term->title);
+    }
+    return $titles;
+  }
+
+}
diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/argument/Iid.php b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/argument/Iid.php
new file mode 100644
index 0000000..b557e1d
--- /dev/null
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/argument/Iid.php
@@ -0,0 +1,42 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\aggregator\Plugin\views\argument\Iid.
+ */
+
+namespace Drupal\aggregator\Plugin\views\argument;
+
+use Drupal\views\Plugin\views\argument\Numeric;
+use Drupal\Core\Annotation\Plugin;
+
+/**
+ * Argument handler to accept an aggregator item id.
+ *
+ * @ingroup views_argument_handlers
+ *
+ * @Plugin(
+ *   id = "aggregator_iid",
+ *   module = "aggregator"
+ * )
+ */
+class Iid extends Numeric {
+
+  /**
+   * Override the behavior of title(). Get the title of the category.
+   */
+  function title_query() {
+    $titles = array();
+    $placeholders = implode(', ', array_fill(0, sizeof($this->value), '%d'));
+
+    $result = db_select('aggregator_item')
+      ->condition('iid', $this->value, 'IN')
+      ->fields(array('title'))
+      ->execute();
+    foreach ($result as $term) {
+      $titles[] = check_plain($term->title);
+    }
+    return $titles;
+  }
+
+}
diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/field/Category.php b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/field/Category.php
new file mode 100644
index 0000000..9cd4b50
--- /dev/null
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/field/Category.php
@@ -0,0 +1,74 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\aggregator\Plugin\views\field\Category.
+ */
+
+namespace Drupal\aggregator\Plugin\views\field;
+
+use Drupal\views\Plugin\views\field\FieldPluginBase;
+use Drupal\views\ViewExecutable;
+use Drupal\Core\Annotation\Plugin;
+
+/**
+ * Field handler to provide simple renderer that allows linking to aggregator
+ * category.
+ *
+ * @ingroup views_field_handlers
+ *
+ * @Plugin(
+ *   id = "aggregator_category",
+ *   module = "aggregator"
+ * )
+ */
+class Category extends FieldPluginBase {
+
+  /**
+   * Overrides Drupal\views\Plugin\views\field\FieldPluginBase::init().
+   */
+  public function init(ViewExecutable $view, &$options) {
+    parent::init($view, $options);
+
+    $this->additional_fields['cid'] = 'cid';
+  }
+
+  protected function defineOptions() {
+    $options = parent::defineOptions();
+    $options['link_to_category'] = array('default' => FALSE, 'bool' => TRUE);
+    return $options;
+  }
+
+  /**
+   * Provide link to category option
+   */
+  public function buildOptionsForm(&$form, &$form_state) {
+    $form['link_to_category'] = array(
+      '#title' => t('Link this field to its aggregator category page'),
+      '#description' => t('This will override any other link you have set.'),
+      '#type' => 'checkbox',
+      '#default_value' => !empty($this->options['link_to_category']),
+    );
+    parent::buildOptionsForm($form, $form_state);
+  }
+
+  /**
+   * Render whatever the data is as a link to the category.
+   *
+   * Data should be made XSS safe prior to calling this function.
+   */
+  function render_link($data, $values) {
+    $cid = $this->get_value($values, 'cid');
+    if (!empty($this->options['link_to_category']) && !empty($cid) && $data !== NULL && $data !== '') {
+      $this->options['alter']['make_link'] = TRUE;
+      $this->options['alter']['path'] = "aggregator/category/$cid";
+    }
+    return $data;
+  }
+
+  function render($values) {
+    $value = $this->get_value($values);
+    return $this->render_link($this->sanitizeValue($value), $values);
+  }
+
+}
diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/field/TitleLink.php b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/field/TitleLink.php
new file mode 100644
index 0000000..94a336d
--- /dev/null
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/field/TitleLink.php
@@ -0,0 +1,72 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\aggregator\Plugin\views\field\TitleLink.
+ */
+
+namespace Drupal\aggregator\Plugin\views\field;
+
+use Drupal\views\Plugin\views\field\FieldPluginBase;
+use Drupal\views\ViewExecutable;
+use Drupal\Core\Annotation\Plugin;
+
+/**
+ * Field handler that turns an item's title into a clickable link to the original
+ * source article.
+ *
+ * @ingroup views_field_handlers
+ *
+ * @Plugin(
+ *   id = "aggregator_title_link",
+ *   module = "aggregator"
+ * )
+ */
+class TitleLink extends FieldPluginBase {
+
+  /**
+   * Overrides Drupal\views\Plugin\views\field\FieldPluginBase::init().
+   */
+  public function init(ViewExecutable $view, &$options) {
+    parent::init($view, $options);
+
+    $this->additional_fields['link'] = 'link';
+  }
+
+  protected function defineOptions() {
+    $options = parent::defineOptions();
+
+    $options['display_as_link'] = array('default' => TRUE, 'bool' => TRUE);
+
+    return $options;
+  }
+
+  /**
+   * Provide link to the page being visited.
+   */
+  public function buildOptionsForm(&$form, &$form_state) {
+    $form['display_as_link'] = array(
+      '#title' => t('Display as link'),
+      '#type' => 'checkbox',
+      '#default_value' => !empty($this->options['display_as_link']),
+    );
+    parent::buildOptionsForm($form, $form_state);
+  }
+
+  function render($values) {
+    $value = $this->get_value($values);
+    return $this->render_link($this->sanitizeValue($value), $values);
+  }
+
+  function render_link($data, $values) {
+    $link = $this->get_value($values, 'link');
+    if (!empty($this->options['display_as_link'])) {
+      $this->options['alter']['make_link'] = TRUE;
+      $this->options['alter']['path'] = $link;
+      $this->options['alter']['html'] = TRUE;
+    }
+
+    return $data;
+  }
+
+}
diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/field/Xss.php b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/field/Xss.php
new file mode 100644
index 0000000..017d77f
--- /dev/null
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/field/Xss.php
@@ -0,0 +1,30 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\aggregator\Plugin\views\field\Xss.
+ */
+
+namespace Drupal\aggregator\Plugin\views\field;
+
+use Drupal\views\Plugin\views\field\FieldPluginBase;
+use Drupal\Core\Annotation\Plugin;
+
+/**
+ * Filters htmls tags from item.
+ *
+ * @ingroup views_field_handlers
+ *
+ * @Plugin(
+ *   id = "aggregator_xss",
+ *   module = "aggregator"
+ * )
+ */
+class Xss extends FieldPluginBase {
+
+  function render($values) {
+    $value = $this->get_value($values);
+    return aggregator_filter_xss($value);
+  }
+
+}
diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/filter/CategoryCid.php b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/filter/CategoryCid.php
new file mode 100644
index 0000000..c256ed9
--- /dev/null
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/filter/CategoryCid.php
@@ -0,0 +1,39 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\aggregator\Plugin\views\filter\CategoryCid.
+ */
+
+namespace Drupal\aggregator\Plugin\views\filter;
+
+use Drupal\views\Plugin\views\filter\InOperator;
+use Drupal\Core\Annotation\Plugin;
+
+/**
+ * Filter by aggregator category cid
+ *
+ * @ingroup views_filter_handlers
+ *
+ * @Plugin(
+ *   id = "aggregator_category_cid",
+ *   module = "aggregator"
+ * )
+ */
+class CategoryCid extends InOperator {
+
+  function get_value_options() {
+    if (isset($this->value_options)) {
+      return;
+    }
+
+    $this->value_options = array();
+    // Uses db_query() rather than db_select() because the query is static and
+    // does not include any variables.
+    $result = db_query('SELECT * FROM {aggregator_category} ORDER BY title');
+    foreach ($result as $category) {
+      $this->value_options[$category->cid] = $category->title;
+    }
+  }
+
+}
diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/row/Rss.php b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/row/Rss.php
new file mode 100644
index 0000000..bb46b33
--- /dev/null
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/views/row/Rss.php
@@ -0,0 +1,92 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\aggregator\Plugin\views\row\Rss.
+ */
+
+namespace Drupal\aggregator\Plugin\views\row;
+
+use Drupal\views\Plugin\views\row\RowPluginBase;
+use Drupal\Core\Annotation\Plugin;
+use Drupal\Core\Annotation\Translation;
+
+/**
+ * Plugin which loads an aggregator item and formats it as an RSS item.
+ *
+ * @Plugin(
+ *   id = "aggregator_rss",
+ *   module = "aggregator",
+ *   theme = "views_view_row_rss",
+ *   title = @Translation("Aggregator item"),
+ *   help = @Translation("Display the aggregator item using the data from the original source."),
+ *   type = "feed"
+ * )
+ */
+class Rss extends RowPluginBase {
+
+  var $base_table = 'aggregator_item';
+  var $base_field = 'iid';
+
+  protected function defineOptions() {
+    $options = parent::defineOptions();
+
+    $options['item_length'] = array('default' => 'default');
+
+    return $options;
+  }
+
+  public function buildOptionsForm(&$form, &$form_state) {
+    $form['item_length'] = array(
+      '#type' => 'select',
+      '#title' => t('Display type'),
+      '#options' => array(
+        'fulltext' => t('Full text'),
+        'teaser' => t('Title plus teaser'),
+        'title' => t('Title only'),
+        'default' => t('Use default RSS settings'),
+      ),
+      '#default_value' => $this->options['item_length'],
+    );
+  }
+
+  function render($row) {
+    $iid =  $row->{$this->field_alias};
+    $query = db_select('aggregator_item', 'ai');
+    $query->leftJoin('aggregator_feed', 'af', 'ai.fid = af.fid');
+    $query->fields('ai');
+    $query->addExpression('af.title', 'feed_title');
+    $query->addExpression('ai.link', 'feed_LINK');
+    $query->condition('iid', $iid);
+    $result = $query->execute();
+
+    $item->elements = array(
+      array(
+        'key' => 'pubDate',
+        'value' => gmdate('r', $item->timestamp),
+      ),
+      array(
+        'key' => 'dc:creator',
+        'value' => $item->author,
+      ),
+      array(
+        'key' => 'guid',
+        'value' => $item->guid,
+        'attributes' => array('isPermaLink' => 'false')
+      ),
+    );
+
+    foreach ($item->elements as $element) {
+      if (isset($element['namespace'])) {
+        $this->view->style_plugin->namespaces = array_merge($this->view->style_plugin->namespaces, $element['namespace']);
+      }
+    }
+
+    return theme($this->themeFunctions(), array(
+      'view' => $this->view,
+      'options' => $this->options,
+      'row' => $item
+    ));
+  }
+
+}
diff --git a/core/modules/views/lib/Drupal/views/Tests/Handler/HandlerAllTest.php b/core/modules/views/lib/Drupal/views/Tests/Handler/HandlerAllTest.php
index 02fa8f5..0d2c92f 100644
--- a/core/modules/views/lib/Drupal/views/Tests/Handler/HandlerAllTest.php
+++ b/core/modules/views/lib/Drupal/views/Tests/Handler/HandlerAllTest.php
@@ -95,7 +95,12 @@ public function testHandlers() {
       foreach ($object_types as $type) {
         if (isset($view->{$type})) {
           foreach ($view->{$type} as $handler) {
-            $this->assertTrue($handler instanceof HandlerBase);
+            $this->assertTrue($handler instanceof HandlerBase, format_string(
+              '@type handler of class %class is an instance of HandlerBase',
+              array(
+                '@type' => $type,
+                '%class' => get_class($handler),
+              )));
           }
         }
       }