sdk/lib/html/dart2js/html_dart2js.dart

Index: sdk/lib/html/dart2js/html_dart2js.dart
diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart
index c08daed3ed8ce5096e3619f781dee9100f0f592e..d521e63d3bf8740f857a2dbe01c1438b7941b4c0 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -13274,9 +13274,7 @@ class HttpRequest extends XmlHttpRequestEventTarget native "XMLHttpRequest" {
       }
     });
 
-    xhr.onError.listen((e) {
-      completer.completeError(e);
-    });
+    xhr.onError.listen(completer.completeError);
 
     if (sendData != null) {
       xhr.send(sendData);
@@ -29083,7 +29081,7 @@ class _EventStream<T extends Event> extends Stream<T> {
   bool get isBroadcast => true;
 
   StreamSubscription<T> listen(void onData(T event),
-      { void onError(error),
+      { Function onError,
         void onDone(),
         bool cancelOnError}) {
 
@@ -29146,7 +29144,7 @@ class _ElementListEventStreamImpl<T extends Event> extends Stream<T>
 
   // Delegate all regular Stream behavor to our wrapped Stream.
   StreamSubscription<T> listen(void onData(T event),
-      { void onError(error),
+      { Function onError,
         void onDone(),
         bool cancelOnError}) =>
       _stream.listen(onData, onError: onError, onDone: onDone,
@@ -29182,7 +29180,7 @@ class _CustomEventStreamImpl<T extends Event> extends Stream<T>
 
   // Delegate all regular Stream behavior to our wrapped Stream.
   StreamSubscription<T> listen(void onData(T event),
-      { void onError(error),
+      { Function onError,
         void onDone(),
         bool cancelOnError}) {
     return _streamController.stream.listen(onData, onError: onError,
@@ -29311,7 +29309,7 @@ class _EventStreamSubscription<T extends Event> extends StreamSubscription<T> {
   }
 
   /// Has no effect.
-  void onError(void handleError(error)) {}
+  void onError(Function handleError) {}
 
   /// Has no effect.
   void onDone(void handleDone()) {}