Run clang-format on .js files in c/b/r/md_extensions

chrome/browser/resources/md_extensions/pack_dialog.js

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 cr.define('extensions', function() {
   'use strict';
 
   /** @interface */
   function PackDialogDelegate() {}
 
@@ skipping 57 matching lines @@
       }.bind(this));
     },
 
     /** @private */
     onConfirmTap_: function() {
       this.delegate.packExtension(this.packDirectory_, this.keyFile_);
       this.close();
     },
   });
 
-  return {PackDialog: PackDialog,
-          PackDialogDelegate: PackDialogDelegate};
+  return {PackDialog: PackDialog, PackDialogDelegate: PackDialogDelegate};
 });