Get rid of a lot of () for getters.

lib/html/src/XMLHttpRequestUploadWrappingImplementation.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class XMLHttpRequestUploadEventsImplementation extends EventsImplementation
     implements XMLHttpRequestUploadEvents {
   XMLHttpRequestUploadEventsImplementation._wrap(_ptr) : super._wrap(_ptr);
 
-  EventListenerList get abort() => _get('abort');
-  EventListenerList get error() => _get('error');
-  EventListenerList get load() => _get('load');
-  EventListenerList get loadStart() => _get('loadstart');
-  EventListenerList get progress() => _get('progress');
+  EventListenerList get abort => _get('abort');
+  EventListenerList get error => _get('error');
+  EventListenerList get load => _get('load');
+  EventListenerList get loadStart => _get('loadstart');
+  EventListenerList get progress => _get('progress');
 }
 
 class XMLHttpRequestUploadWrappingImplementation extends EventTargetWrappingImplementation implements XMLHttpRequestUpload {
   XMLHttpRequestUploadWrappingImplementation._wrap(ptr) : super._wrap(ptr) {}
 
-  XMLHttpRequestUploadEvents get on() {
+  XMLHttpRequestUploadEvents get on {
     if (_on === null) {
       _on = new XMLHttpRequestUploadEventsImplementation._wrap(_ptr);
     }
     return _on;
   }
 }