fix(WebWorkers): Add support for transitionend events.

Closes #6649

modules/angular2/src/web_workers/ui/event_dispatcher.ts

@@ -3,7 +3,8 @@ import {
   serializeMouseEvent,
   serializeKeyboardEvent,
   serializeGenericEvent,
-  serializeEventWithTarget
+  serializeEventWithTarget,
+  serializeTransitionEvent
 } from 'angular2/src/web_workers/ui/event_serializer';
 import {BaseException, WrappedException} from 'angular2/src/facade/exceptions';
 import {StringMapWrapper} from 'angular2/src/facade/collection';
@@ -89,6 +90,9 @@ export class EventDispatcher {
       case "waiting":
         serializedEvent = serializeGenericEvent(event);
         break;
+      case "transitionend":
+        serializedEvent = serializeTransitionEvent(event);
+        break;
       default:
         throw new BaseException(eventName + " not supported on WebWorkers");
     }

modules/angular2/src/web_workers/ui/event_serializer.dart

@@ -86,6 +86,14 @@ Map<String, dynamic> serializeKeyboardEvent(dynamic e) {
   return serialized;
 }
 
+Map<String, dynamic> serializeTransitionEvent(dynamic e) {
+  var serialized = serializeGenericEvent(e);
+  serialized['propertyName'] = e.propertyName;
+  serialized['elapsedTime'] = e.elapsedTime;
+  serialized['pseudoElement'] = e.pseudoElement;
+  return addTarget(e, serialized);
+}
+
 // TODO(jteplitz602): #3374. See above.
 Map<String, dynamic> addTarget(
     dynamic e, Map<String, dynamic> serializedEvent) {

modules/angular2/src/web_workers/ui/event_serializer.ts

@@ -32,6 +32,8 @@ const KEYBOARD_EVENT_PROPERTIES = [
   'which'
 ];
 
+const TRANSITION_EVENT_PROPERTIES = ['propertyName', 'elapsedTime', 'pseudoElement'];
+
 const EVENT_PROPERTIES = ['type', 'bubbles', 'cancelable'];
 
 const NODES_WITH_VALUE =
@@ -57,6 +59,11 @@ export function serializeKeyboardEvent(e: KeyboardEvent): {[key: string]: any} {
   return addTarget(e, serializedEvent);
 }
 
+export function serializeTransitionEvent(e: TransitionEvent): {[key: string]: any} {
+  var serializedEvent = serializeEvent(e, TRANSITION_EVENT_PROPERTIES);
+  return addTarget(e, serializedEvent);
+}
+
 // TODO(jteplitz602): #3374. See above.
 function addTarget(e: Event, serializedEvent: {[key: string]: any}): {[key: string]: any} {
   if (NODES_WITH_VALUE.has((<HTMLElement>e.target).tagName.toLowerCase())) {

modules/angular2/src/web_workers/worker/event_deserializer.dart

@@ -31,6 +31,10 @@ class GenericEvent {
   Point get page => _getPoint('page');
   Point get screen => _getPoint('screen');
 
+  String get propertyName => properties['propertyName'];
+  num get elapsedTime => properties['elapsedTime'];
+  String get pseudoElement => properties['pseudoElement'];
+
   EventTarget get target {
     if (_target != null) {
       return _target;