Fix bug in previous commit.

sdk/lib/web_audio/dartium/web_audio_dartium.dart

 library dart.dom.web_audio;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:html';
 import 'dart:html_common';
 import 'dart:nativewrappers';
 import 'dart:typeddata' as _typeddata;
 // DO NOT EDIT
 // Auto-generated dart:audio library.
@@ skipping 213 matching lines @@
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('AudioContext')
 class AudioContext extends EventTarget {
   AudioContext.internal() : super.internal();
 
   @DomName('AudioContext.completeEvent')
   @DocsEditable
   static const EventStreamProvider<Event> completeEvent = const EventStreamProvider<Event>('complete');
+  factory AudioContext() => _create();
+
+  @DocsEditable
+  static AudioContext _create() native "AudioContext_constructorCallback";
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => true;
 
   @DomName('AudioContext.activeSourceCount')
   @DocsEditable
   int get activeSourceCount native "AudioContext_activeSourceCount_Getter";
 
   @DomName('AudioContext.currentTime')
   @DocsEditable
@@ skipping 862 matching lines @@
     return _eventStream;
   }
 
 
   ScriptProcessorNode.internal() : super.internal();
 
   @DomName('ScriptProcessorNode.bufferSize')
   @DocsEditable
   int get bufferSize native "ScriptProcessorNode_bufferSize_Getter";
 
+  @DomName('ScriptProcessorNode._setEventListener')
+  @DocsEditable
+  void _setEventListener(EventListener eventListener) native "ScriptProcessorNode__setEventListener_Callback";
+
 }
 // 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.
 
 // WARNING: Do not edit - generated code.
 
 
 @DocsEditable
 @DomName('WaveShaperNode')
@@ skipping 15 matching lines @@
 
 // WARNING: Do not edit - generated code.
 
 
 @DocsEditable
 @DomName('WaveTable')
 class WaveTable extends NativeFieldWrapperClass1 {
   WaveTable.internal();
 
 }