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

chrome/browser/resources/md_extensions/load_error.js

 // Copyright 2017 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 LoadErrorDelegate() {}
 
@@ skipping 46 matching lines @@
         highlight: source ? source.highlight : '',
         afterHighlight: source ? source.afterHighlight : '',
         title: '',
         message: this.loadError.error,
       };
 
       this.$.code.code = codeSectionProperties;
     },
   });
 
-  return {LoadError: LoadError,
-          LoadErrorDelegate: LoadErrorDelegate};
+  return {LoadError: LoadError, LoadErrorDelegate: LoadErrorDelegate};
 });