Fix some straight-forward closure compiler errors.

chrome/browser/resources/hotword/base_session_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';
 
   /**
    * Base class for managing hotwording sessions.
    * @param {!hotword.StateManager} stateManager Manager of global hotwording
    *     state.
    * @param {!hotword.constants.SessionSource} sessionSource Source of the
    *     hotword session request.
    * @constructor
-   * @struct
    */
   function BaseSessionManager(stateManager, sessionSource) {
     /**
      * Manager of global hotwording state.
      * @protected {!hotword.StateManager}
      */
     this.stateManager = stateManager;
 
     /**
      * Source of the hotword session request.
@@ skipping 121 matching lines @@
         this.removeListeners_();
         this.stopSession_();
       }
     }
   };
 
   return {
     BaseSessionManager: BaseSessionManager
   };
 });