core/modules/media/src/Plugin/Filter/MediaEmbed.php | 21 ++++++++++-----------
 1 file changed, 10 insertions(+), 11 deletions(-)

diff --git a/core/modules/media/src/Plugin/Filter/MediaEmbed.php b/core/modules/media/src/Plugin/Filter/MediaEmbed.php
index ea1fe9d132..83e0a2126c 100644
--- a/core/modules/media/src/Plugin/Filter/MediaEmbed.php
+++ b/core/modules/media/src/Plugin/Filter/MediaEmbed.php
@@ -5,7 +5,6 @@
 use Drupal\Component\Utility\Html;
 use Drupal\Core\Entity\EntityRepositoryInterface;
 use Drupal\Core\Entity\EntityTypeManagerInterface;
-use Drupal\Core\Logger\RfcLogLevel;
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
 use Drupal\Core\Render\BubbleableMetadata;
 use Drupal\Core\Render\RenderContext;
@@ -28,28 +27,28 @@
  *
  * @internal
  */
-final class MediaEmbed extends FilterBase implements ContainerFactoryPluginInterface {
+class MediaEmbed extends FilterBase implements ContainerFactoryPluginInterface {
 
   /**
    * The entity repository.
    *
    * @var \Drupal\Core\Entity\EntityRepositoryInterface
    */
-  private $entityRepository;
+  protected $entityRepository;
 
   /**
    * The entity type manager.
    *
    * @var \Drupal\Core\Entity\EntityTypeManagerInterface
    */
-  private $entityTypeManager;
+  protected $entityTypeManager;
 
   /**
    * The renderer.
    *
    * @var \Drupal\Core\Render\RendererInterface
    */
-  private $renderer;
+  protected $renderer;
 
   /**
    * Constructs a MediaEmbed object.
@@ -101,7 +100,7 @@ public static function create(ContainerInterface $container, array $configuratio
    * @return array
    *   A render array.
    */
-  private function renderMedia(MediaInterface $media, $view_mode, $langcode) {
+  protected function renderMedia(MediaInterface $media, $view_mode, $langcode) {
     $build = $this->entityTypeManager
       ->getViewBuilder('media')
       ->view($media, $view_mode, $langcode);
@@ -129,7 +128,7 @@ private function renderMedia(MediaInterface $media, $view_mode, $langcode) {
    * @return array
    *   A render array.
    */
-  private function renderMissingMedia() {
+  protected function renderMissingMedia() {
     return [
       '#type' => 'html_tag',
       '#tag' => 'img',
@@ -159,12 +158,12 @@ public function process($text, $langcode) {
         $media = $this->entityRepository->loadEntityByUuid('media', $uuid);
         assert($media === NULL || $media instanceof MediaInterface);
         if (!$media) {
-          \Drupal::logger('media')->log(RfcLogLevel::ERROR, 'The media item with UUID "@uuid" does not exist.', ['@uuid' => $uuid]);
+          \Drupal::logger('media')->error('The media item with UUID "@uuid" does not exist.', ['@uuid' => $uuid]);
         }
 
         $view_mode = $this->entityRepository->loadEntityByConfigTarget('entity_view_mode', "media.$view_mode_id");
         if (!$view_mode) {
-          \Drupal::logger('media')->log(RfcLogLevel::ERROR, 'The view mode "@view-mode-id" does not exist.', ['@view-mode-id' => $view_mode_id]);
+          \Drupal::logger('media')->error('The view mode "@view-mode-id" does not exist.', ['@view-mode-id' => $view_mode_id]);
         }
 
         // @todo recursive embedding protection
@@ -211,7 +210,7 @@ public function tips($long = FALSE) {
    *   The accumulated result of filter processing, updated with the metadata
    *   bubbled during rendering.
    */
-  private function renderIntoDomNode(array $build, \DOMNode $node, FilterProcessResult &$result) {
+  protected function renderIntoDomNode(array $build, \DOMNode $node, FilterProcessResult &$result) {
     // We need to render the embedded entity:
     // - without replacing placeholders, so that the placeholders are
     //   only replaced at the last possible moment. Hence we cannot use
@@ -236,7 +235,7 @@ private function renderIntoDomNode(array $build, \DOMNode $node, FilterProcessRe
    * @param string $content
    *   The text or HTML that will replace the contents of $node.
    */
-  private static function replaceNodeContent(\DOMNode &$node, $content) {
+  protected static function replaceNodeContent(\DOMNode &$node, $content) {
     if (strlen($content)) {
       // Load the content into a new DOMDocument and retrieve the DOM nodes.
       $replacement_nodes = Html::load($content)->getElementsByTagName('body')