Fix some JS style nits.

chrome/test/data/extensions/api_test/file_system_provider/notify/test.js

 // Copyright 2014 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';
 
 /**
  * @type {Object}
  * @const
  */
@@ skipping 12 matching lines @@
 
 /**
  * @type {string}
  * @const
  */
 var TESTING_ANOTHER_TAG = "hello-giraffe";
 
 /**
  * List of directory changed events received from the chrome.fileManagerPrivate
  * API.
- * @type {Array.<Object>}
+ * @type {Array<Object>}
  */
 var directoryChangedEvents = [];
 
 /**
  * Callback to be called when a directory changed event arrives.
  * @type {function()|null}
  */
 var directoryChangedCallback = null;
 
 /**
@@ skipping 195 matching lines @@
                     tag: TESTING_ANOTHER_TAG
                   }, chrome.test.callbackFail('NOT_FOUND'));
                 })).catch(chrome.test.fail);
             }));
     }
   ]);
 }
 
 // Setup and run all of the test cases.
 setUp(runTests);