[Cleanup] Files.app: Misc style fixes in Javascript code.

chrome/browser/resources/file_manager/js/metadata/metadata_dispatcher.js

 // Copyright (c) 2012 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.
 
 // All of these scripts could be imported with a single call to importScripts,
 // but then load and compile time errors would all be reported from the same
 // line.
 importScripts('metadata_parser.js');
 importScripts('byte_reader.js');
 importScripts('../util.js');
 
 /**
  * Dispatches metadata requests to the correct parser.
  *
+ * @param {Object} port Worker port.
  * @constructor
- * @param {Object} port Worker port.
  */
 function MetadataDispatcher(port) {
   this.port_ = port;
   this.port_.onmessage = this.onMessage.bind(this);
 
   // Make sure to update component_extension_resources.grd
   // when adding new parsers.
   importScripts('exif_parser.js');
   importScripts('image_parsers.js');
   importScripts('mpeg_parser.js');
@@ skipping 188 matching lines @@
 if (global.constructor.name == 'SharedWorkerContext') {
   global.addEventListener('connect', function(e) {
     var port = e.ports[0];
     new MetadataDispatcher(port);
     port.start();
   });
 } else {
   // Non-shared worker.
   new MetadataDispatcher(global);
 }