[Files.app] Split the JavaScript files into subdirectories: common, background, and foreground

chrome/browser/resources/file_manager/foreground/js/cws_container_client.js

 // Copyright 2013 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.
 
 'use strict';
 
 /**
  * @param {WebView} webView Web View tag.
  * @param {string} ext File extension.
  * @param {string} mime File mime type.
@@ skipping 221 matching lines @@
       'loadabort', this.onLoadAbortBound_);
   this.webView_.stop();
 };
 
 /**
  * Cleans the dialog by removing all handlers.
  */
 CWSContainerClient.prototype.dispose = function() {
   this.abort();
 };