Version 0.8.10.1

dart/tools/dom/templates/html/impl/impl_Window.darttemplate

Index: dart/tools/dom/templates/html/impl/impl_Window.darttemplate
===================================================================
--- dart/tools/dom/templates/html/impl/impl_Window.darttemplate	(revision 29785)
+++ dart/tools/dom/templates/html/impl/impl_Window.darttemplate	(working copy)
@@ -271,13 +271,18 @@
   static bool get supportsPointConversions => _DomPoint.supported;
 $!MEMBERS
 
+  /**
+   * Static factory designed to expose `beforeunload` events to event
+   * handlers that are not necessarily instances of [Window].
+   *
+   * See [EventStreamProvider] for usage information.
+   */
   @DomName('Window.beforeunloadEvent')
-  @DocsEditable()
   static const EventStreamProvider<BeforeUnloadEvent> beforeUnloadEvent =
       const _BeforeUnloadEventStreamProvider('beforeunload');
 
+  /// Stream of `beforeunload` events handled by this [Window].
   @DomName('Window.onbeforeunload')
-  @DocsEditable()
   Stream<Event> get onBeforeUnload => beforeUnloadEvent.forTarget(this);
 
   void moveTo(Point p) {
@@ -292,6 +297,7 @@
 $endif
 }
 
+$if DART2JS
 class _BeforeUnloadEvent extends _WrappedEvent implements BeforeUnloadEvent {
   String _returnValue;
 
@@ -301,15 +307,14 @@
 
   void set returnValue(String value) {
     _returnValue = value;
-$if DART2JS
     // FF and IE use the value as the return value, Chrome will return this from
     // the event callback function.
     if (JS('bool', '("returnValue" in #)', wrapped)) {
       JS('void', '#.returnValue = #', wrapped, value);
     }
-$endif
   }
 }
+$endif
 
 class _BeforeUnloadEventStreamProvider implements
     EventStreamProvider<BeforeUnloadEvent> {
@@ -318,8 +323,10 @@
   const _BeforeUnloadEventStreamProvider(this._eventType);
 
   Stream<BeforeUnloadEvent> forTarget(EventTarget e, {bool useCapture: false}) {
+    var stream = new _EventStream(e, _eventType, useCapture);
+$if DART2JS
     var controller = new StreamController(sync: true);
-    var stream = new _EventStream(e, _eventType, useCapture);
+
     stream.listen((event) {
       var wrapped = new _BeforeUnloadEvent(event);
       controller.add(wrapped);
@@ -327,6 +334,9 @@
     });
 
     return controller.stream;
+$else
+    return stream;
+$endif
   }
 
   String getEventType(EventTarget target) {