Replace the entity manager with the entity type manager and remove unused imports in code base.

There are some more places where we inject entity.manager via create() method. We should probably convert that too.

+++ b/src/Plugin/EntityBrowser/FieldWidgetDisplay/ImageThumbnail.php
@@ -80,7 +80,7 @@ class ImageThumbnail extends FieldWidgetDisplayBase implements ContainerFactoryP
+    foreach (\Drupal::entityTypeManager()->getStorage('image_style')->loadMultiple() as $id => $image_style) {

This is not the right approach. Instead of using static way we should inject entity type manager instead of entity manager and use that.

+++ b/src/Plugin/EntityBrowser/FieldWidgetDisplay/ImageThumbnail.php
@@ -80,7 +80,7 @@ class ImageThumbnail extends FieldWidgetDisplayBase implements ContainerFactoryP
-    foreach ($this->entityManager->getStorage('image_style')->loadMultiple() as $id => $image_style) {
+    foreach (\Drupal::entityTypeManager()->getStorage('image_style')->loadMultiple() as $id => $image_style) {
       $options[$id] = $image_style->label();

This was using injected entity manager and is not any more. There are few changes like this in the patch.

I don't see any major issue with this patch.

For me could be a RTBC but I've no idea if I could change the status (in core you can't).

Also It apply well too so it could be merged as it.

#8 looks great, however a couple of instances were still remaining.

Looks OK. Would be great to prepare patch that would update entity browser widgets that DropzoneJS ships. This way we can commit everything in one step and prevent fatals from appearing for people.

Needs reroll.

Reroll.

Created a follow-up: #2763529: Update to support recent WidgetBase.php changes

Committed. Thanks!

Can we do a hotfix? Looks like these instances of Entity Manager were missed, breaking both widgets:

$ grep entityManager -R .
./src/Plugin/EntityBrowser/Widget/Upload.php:      $files[] = $this->entityManager->getStorage('file')->load($fid);
./src/Plugin/EntityBrowser/Widget/View.php:      $view = $this->entityManager->getStorage('view')->load($view_id);

Fixed view. Upload seems to be ok in HEAD. Rebase problem?