Compile print_preview, part 3: reduce down to 185 errors

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

Index: ui/webui/resources/js/cr/event_target.js
diff --git a/ui/webui/resources/js/cr/event_target.js b/ui/webui/resources/js/cr/event_target.js
index 0d6fbd58adef11a886e548167ea7cd59456e0613..14f431b88bd536bb93ddafca245c964ab3b13f3c 100644
--- a/ui/webui/resources/js/cr/event_target.js
+++ b/ui/webui/resources/js/cr/event_target.js
@@ -23,8 +23,8 @@ cr.define('cr', function() {
     /**
      * Adds an event listener to the target.
      * @param {string} type The name of the event.
-     * @param {!Function|{handleEvent:Function}} handler The handler for the
-     *     event. This is called when the event is dispatched.
+     * @param {EventListener|function(!Event):(boolean|undefined)} handler The

[Dan Beam, 2014/09/29 18:42:00]

nit: typedef

[Dan Beam, 2014/09/29 18:42:01]

why boolean|undefined rather than just *?  a method that returns * can still be
compared to === false

[Vitaly Pavlenko, 2014/10/01 00:33:37]

Done.

[Vitaly Pavlenko, 2014/10/01 00:33:38]

Done.

+     *     handler for the event. This is called when the event is dispatched.
      */
     addEventListener: function(type, handler) {
       if (!this.listeners_)
@@ -41,8 +41,8 @@ cr.define('cr', function() {
     /**
      * Removes an event listener from the target.
      * @param {string} type The name of the event.
-     * @param {!Function|{handleEvent:Function}} handler The handler for the
-     *     event.
+     * @param {EventListener|function(!Event):(boolean|undefined)} handler The
+     *     handler for the event.
      */
     removeEventListener: function(type, handler) {
       if (!this.listeners_)