Issue #2553953 by alexpott, Wim Leers, Gábor Hojtsy: Remove SafeMarkup::set()...

Issue #2553953 by alexpott, Wim Leers, Gábor Hojtsy: Remove SafeMarkup::set() from RestExport and replace it with ViewsRenderPipelineSafeString

core/modules/rest/src/Plugin/views/display/RestExport.php

@@ -15,6 +15,7 @@
 use Drupal\Core\Routing\RouteProviderInterface;
 use Drupal\Core\State\StateInterface;
 use Drupal\views\Plugin\views\display\ResponseDisplayPluginInterface;
+use Drupal\views\Render\ViewsRenderPipelineSafeString;
 use Drupal\views\ViewExecutable;
 use Drupal\views\Plugin\views\display\PathPluginBase;
 use Symfony\Component\DependencyInjection\ContainerInterface;
@@ -334,7 +335,7 @@ public function render() {
       // executed by an HTML agent.
       // @todo Decide how to support non-HTML in the render API in
       //   https://www.drupal.org/node/2501313.
-      $build['#markup'] = SafeMarkup::set($build['#markup']);
+      $build['#markup'] = ViewsRenderPipelineSafeString::create($build['#markup']);
     }
 
     parent::applyDisplayCachablityMetadata($build);