Fixing HttpRequest.upload.onProgress.

sdk/lib/html/dart2js/html_dart2js.dart

 /// The Dart HTML library.
 library dart.dom.html;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:_collection-dev' hide Symbol;
 import 'dart:html_common';
 import 'dart:indexed_db';
 import 'dart:isolate';
 import 'dart:json' as json;
@@ skipping 11863 matching lines @@
 }
 // Copyright (c) 2012, 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.
 
 
 @DocsEditable
 @DomName('XMLHttpRequestUpload')
 // http://xhr.spec.whatwg.org/#xmlhttprequestupload
 @Experimental
-class HttpRequestUpload extends EventTarget native "XMLHttpRequestUpload" {
+class HttpRequestUpload extends EventTarget native "XMLHttpRequestUpload,XMLHttpRequestEventTarget" {
 
   @DomName('XMLHttpRequestUpload.abortEvent')
   @DocsEditable
   static const EventStreamProvider<ProgressEvent> abortEvent = const EventStreamProvider<ProgressEvent>('abort');
 
   @DomName('XMLHttpRequestUpload.errorEvent')
   @DocsEditable
   static const EventStreamProvider<ProgressEvent> errorEvent = const EventStreamProvider<ProgressEvent>('error');
 
   @DomName('XMLHttpRequestUpload.loadEvent')
@@ skipping 17462 matching lines @@
       _position = nextPosition;
       return true;
     }
     _current = null;
     _position = _array.length;
     return false;
   }
 
   T get current => _current;
 }