[Cleanup] Files.app: adds '@private' annotations to JSdoc of private methods.

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 13 matching lines @@
 
   this.nextStep = this.nextStep_.bind(this);
   this.onError = this.onError_.bind(this);
   this.apply = this.start.bind(this);
 }
 
 
 /**
  * Error handling function, which fires error callback.
  *
+ * @private
  * @param err error message.
  */
 FunctionParallel.prototype.onError_ = function(err) {
   if (!this.failed_) {
     this.failed_ = true;
     this.failureCallback_(err);
   }
 };
 
 /**
  * Advances to next step. This method should not be used externally. In external
  * cases should be used nextStep function, which is defined in closure and thus
  * has access to internal variables of functionsequence.
+ * @private
  */
 FunctionParallel.prototype.nextStep_ = function() {
   if (--this.remaining == 0 && !this.failed_) {
     this.callback_();
   }
 };
 
 /**
  * This function should be called only once on start, so start all the children
  * at once
  */
 FunctionParallel.prototype.start = function(var_args) {
   this.logger.vlog('Starting [' + this.steps_.length + '] parallel tasks with '
                     + arguments.length + ' argument(s)');
   if (this.logger.verbose) {
     for (var j = 0; j < arguments.length; j++) {
       this.logger.vlog(arguments[j]);
     }
   }
   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());
     }
   }
 };