[Cleanup] Files.app: Fill missing type annotation in @param tag.

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 {string} name  //TODO(JSDOC).
- * @param steps             array of functions to invoke in parallel.
+ * @param {Array.<function>} steps Array of functions to invoke in parallel.
  * @param {Object} logger  //TODO(JSDOC).
- * @param callback          callback to invoke on success.
- * @param failureCallback   callback to invoke on failure.
+ * @param {function()} callback Callback to invoke on success.
+ * @param {function(string)} failureCallback Callback to invoke on failure.
+ * @constructor
  */
 function FunctionParallel(name, steps, logger, callback, failureCallback) {
   // Private variables hidden in closure
   this.currentStepIdx_ = -1;
   this.failed_ = false;
   this.steps_ = steps;
   this.callback_ = callback;
   this.failureCallback_ = failureCallback;
   this.logger = logger;
   this.name = name;
 
   this.remaining = this.steps_.length;
 
   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.
  *
+ * @param {string} err Error message
  * @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
@@ skipping 10 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());
     }
   }
 };