Bug 1825006 - Fix incorrect OPFS file names. r=dom-storage-reviewers,saschanaz,janv

Differential Revision: https://phabricator.services.mozilla.com/D174648

dom/fs/parent/FileSystemManagerParent.cpp

@@ -279,7 +279,10 @@ IPCResult FileSystemManagerParent::RecvGetFile(
     }
   }
 
-  RefPtr<BlobImpl> blob = MakeRefPtr<FileBlobImpl>(fileObject);
+  // TODO: Currently, there is no way to assign type and it is empty.
+  // See bug 1826780.
+  RefPtr<BlobImpl> blob =
+      MakeRefPtr<FileBlobImpl>(fileObject, path.LastElement(), type);
 
   IPCBlob ipcBlob;
   QM_TRY(MOZ_TO_RESULT(IPCBlobUtils::Serialize(blob, ipcBlob)), IPC_OK(),