Compile print_preview, part 3: reduce down to 185 errors

ui/webui/resources/js/cr/event_target.js

 // Copyright (c) 2010 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.
 
 /**
  * @fileoverview This contains an implementation of the EventTarget interface
  * as defined by DOM Level 2 Events.
  */
 
 /**
- * @typedef {EventListener|function(!Event):(boolean|undefined)}
+ * @typedef {EventListener|function(!Event):*}
  */
 var EventListenerType;
 
 cr.define('cr', function() {
 
   /**
    * Creates a new EventTarget. This class implements the DOM level 2
    * EventTarget interface and can be used wherever those are used.
    * @constructor
    * @implements {EventTarget}
    */
   function EventTarget() {
   }
 
   EventTarget.prototype = {
-
     /**
      * Adds an event listener to the target.
      * @param {string} type The name of the event.
      * @param {EventListenerType} handler The handler for the event. This is
      *     called when the event is dispatched.
      */
     addEventListener: function(type, handler) {
       if (!this.listeners_)
         this.listeners_ = Object.create(null);
       if (!(type in this.listeners_)) {
@@ skipping 59 matching lines @@
 
       return !prevented && !event.defaultPrevented;
     }
   };
 
   // Export
   return {
     EventTarget: EventTarget
   };
 });