Files.app: Fix a jscompiler error.

ui/file_manager/file_manager/background/js/media_import_handler.js

Index: ui/file_manager/file_manager/background/js/media_import_handler.js
diff --git a/ui/file_manager/file_manager/background/js/media_import_handler.js b/ui/file_manager/file_manager/background/js/media_import_handler.js
index 9c54e23cc3857fabb16bf358aea5b917d3498271..7afc737db45d61aa7fbf88ebcabc2409eb1135f8 100644
--- a/ui/file_manager/file_manager/background/js/media_import_handler.js
+++ b/ui/file_manager/file_manager/background/js/media_import_handler.js
@@ -160,8 +160,9 @@ importer.MediaImportHandler.prototype.onFileImported_ =
   }
   // Update info must exist for ENTRY_CHANGED notifications.
   console.assert(updateInfo && updateInfo.destination);
-  /** @type {!importer.MediaImportHandler.ImportTask.EntryChangedInfo} */
-  var info = updateInfo;
+  var info =
+      /** @type {!importer.MediaImportHandler.ImportTask.EntryChangedInfo} */ (
+          updateInfo);
 
   // Tag the import with a private drive property.
   chrome.fileManagerPrivate.setEntryTag(