diff --git a/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php b/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php
index be94ee3..2008c28 100644
--- a/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php
+++ b/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php
@@ -204,6 +204,7 @@ protected function prepare(array $main_content, Request $request, RouteMatchInte
 
     // $page is now fully built. Find all non-empty page regions, and add a
     // theme wrapper function that allows them to be consistently themed.
+    \Drupal::moduleHandler()->load('system');
     $regions = system_region_list(\Drupal::theme()->getActiveTheme()->getName());
     foreach (array_keys($regions) as $region) {
       if (!empty($page[$region])) {
diff --git a/core/modules/block/src/BlockRepository.php b/core/modules/block/src/BlockRepository.php
index c11a4fe..d78e724 100644
--- a/core/modules/block/src/BlockRepository.php
+++ b/core/modules/block/src/BlockRepository.php
@@ -53,6 +53,7 @@ public function __construct(EntityManagerInterface $entity_manager, ThemeManager
    *   An array of human-readable region names keyed by machine name.
    */
   protected function getRegionNames() {
+    \Drupal::moduleHandler()->load('system');
     return system_region_list($this->getTheme());
   }
 
diff --git a/core/modules/views/src/Views.php b/core/modules/views/src/Views.php
index 525177f..ac387d2 100644
--- a/core/modules/views/src/Views.php
+++ b/core/modules/views/src/Views.php
@@ -522,6 +522,20 @@ public static function getPluginTypes($type = NULL) {
   }
 
   /**
+   * #pre_render callback to set contextual links for views using a Page display.
+   */
+  public static function pageDisplayPreRender(array $element) {
+    // If the main content of this page contains a view, attach its contextual
+    // links to the overall page array. This allows them to be rendered directly
+    // next to the page title.
+    \Drupal::moduleHandler()->load('views');
+    if ($view = views_get_page_view()) {
+      views_add_contextual_links($element, 'page', $view, $view->current_display);
+    }
+    return $element;
+  }
+
+  /**
    * Translates a string to the current language or to a given language.
    *
    * See the t() documentation for details.
diff --git a/core/modules/views/views.module b/core/modules/views/views.module
index 507758c..6cbe62c 100644
--- a/core/modules/views/views.module
+++ b/core/modules/views/views.module
@@ -283,24 +283,11 @@ function views_theme_suggestions_comment_alter(array &$suggestions, array $varia
 /**
  * Implements hook_element_info_alter().
  *
- * @see views_page_display_pre_render()
+ * @see \Drupal\views\Views::pageDisplayPreRender
  * @see views_preprocess_page()
  */
 function views_element_info_alter(&$types) {
-  $types['page']['#pre_render'][] = 'views_page_display_pre_render';
-}
-
-/**
- * #pre_render callback to set contextual links for views using a Page display.
- */
-function views_page_display_pre_render(array $element) {
-  // If the main content of this page contains a view, attach its contextual
-  // links to the overall page array. This allows them to be rendered directly
-  // next to the page title.
-  if ($view = views_get_page_view()) {
-    views_add_contextual_links($element, 'page', $view, $view->current_display);
-  }
-  return $element;
+  $types['page']['#pre_render'][] = '\Drupal\views\Views::pageDisplayPreRender';
 }
 
 /**
@@ -314,7 +301,7 @@ function views_preprocess_html(&$variables) {
 
   // If the page contains a view as its main content, contextual links may have
   // been attached to the page as a whole; for example, by
-  // views_page_display_pre_render().
+  // \Drupal\views\Views::pageDisplayPreRender().
   // This allows them to be associated with the page and rendered by default
   // next to the page title (which we want). However, it also causes the
   // Contextual Links module to treat the wrapper for the entire page (i.e.,