Fix some straight-forward closure compiler errors.

chrome/browser/resources/hotword/state_manager.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.
 
 cr.define('hotword', function() {
   'use strict';
 
   /**
    * Trivial container class for session information.
    * @param {!hotword.constants.SessionSource} source Source of the hotword
@@ skipping 24 matching lines @@
      * @private {?function()}
      */
     this.startedCb_ = startedCb;
   }
 
   /**
    * Class to manage hotwording state. Starts/stops the hotword detector based
    * on user settings, session requests, and any other factors that play into
    * whether or not hotwording should be running.
    * @constructor
-   * @struct
    */
   function StateManager() {
     /**
      * Current state.
      * @private {hotword.StateManager.State_}
      */
     this.state_ = State_.STOPPED;
 
     /**
      * Current hotwording status.
      * @private {?chrome.hotwordPrivate.StatusDetails}
      */
     this.hotwordStatus_ = null;
 
     /**
      * NaCl plugin manager.
      * @private {?hotword.NaClManager}
      */
     this.pluginManager_ = null;
 
     /**
      * Currently active hotwording sessions.
-     * @private {!Array.<hotword.Session_>}
+     * @private {!Array.<Session_>}
      */
     this.sessions_ = [];
 
     /**
      * Event that fires when the hotwording status has changed.
-     * @type {!chrome.Event}
+     * @type {!ChromeEvent}
      */
     this.onStatusChanged = new chrome.Event();
 
     /**
      * Hotword trigger audio notification... a.k.a The Chime (tm).
-     * @private {!Audio}
+     * @private {!HTMLAudioElement}
      */
-    this.chime_ = document.createElement('audio');
+    this.chime_ =
+        /** @type {!HTMLAudioElement} */(document.createElement('audio'));
 
     // Get the initial status.
     chrome.hotwordPrivate.getStatus(this.handleStatus_.bind(this));
 
     // Setup the chime and insert into the page.
     this.chime_.src = chrome.extension.getURL(
         hotword.constants.SHARED_MODULE_ROOT + '/audio/chime.wav');
     document.body.appendChild(this.chime_);
   }
 
@@ skipping 248 matching lines @@
       hotword.debug('Stopping session for source: ' + source);
       this.removeSession_(source);
       this.updateStateFromStatus_();
     }
   };
 
   return {
     StateManager: StateManager
   };
 });