[quickview] Fix promise in |canDeleteEntry_| from CL:2040502

No-try: true
No-presubmit: true
Test: No change in behavior, no new tests.
Bug: 803259
Change-Id: Ifcb8ad66dc70aa94e7dd1d8e3bd0085924fd094a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2041718
Commit-Queue: Noel Gordon <noel@chromium.org>
Reviewed-by: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#739267}

ui/file_manager/file_manager/foreground/js/quick_view_controller.js

@@ -311,7 +311,7 @@ class QuickViewController {
    */
   canDeleteEntry_(entry) {
     const deleteCommand = CommandHandler.getCommand('delete');
-    return new Promise(
+    return Promise.resolve(
         deleteCommand.canDeleteEntries([entry], this.fileManager_));
   }