[quickview] Fix closure comments for |canDeleteEntries_|

Bug: 803259
Change-Id: Icf222cbcc0712532a58809b2cd327ee20955ee74
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2033062Reviewed-by: Noel Gordon <noel@chromium.org>
Commit-Queue: Noel Gordon <noel@chromium.org>
Commit-Queue: Rachel Sugrono <rsugrono@google.com>
Cr-Commit-Position: refs/heads/master@{#737676}

ui/file_manager/file_manager/foreground/js/file_manager_commands.js

@@ -1025,9 +1025,10 @@ CommandHandler.COMMANDS_['delete'] = new class extends Command {
   }
 
   /**
-   * Checks if the entries are deletable.
+   * Returns true if all entries can be deleted.
    * @param {!Array<!Entry>} entries
    * @param {!CommandHandlerDeps} fileManager
+   * @return {boolean}
    */
   canDeleteEntries_(entries, fileManager) {
     return entries.length > 0 &&