[File Manager] Cleanup: Moving js/css/html files to dedicated directories

chrome/browser/resources/file_manager/js/metadata/function_parallel.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.
 
 /**
  * @constructor
  * @class FunctionSequence to invoke steps in sequence
  *
  * @param steps             array of functions to invoke in parallel
  * @param callback          callback to invoke on success
@@ skipping 54 matching lines @@
   }
   for (var i=0; i < this.steps_.length; i++) {
     this.logger.vlog('Attempting to start step [' + this.steps_[i].name + ']');
     try {
       this.steps_[i].apply(this, arguments);
     } catch(e) {
       this.onError(e.toString());
     }
   }
 };