Added constructor for AudioContext for dartc and frog

client/dom/frog/frog_dom.dart

 #library('dom');
 
 #native('frog_dom.js');
 // 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.
 
 // DO NOT EDIT
 // Auto-generated Dart DOM library.
 
@@ skipping 94 matching lines @@
   void noteOn(num when) native;
 }
 
 class AudioChannelMerger extends AudioNode native "*AudioChannelMerger" {
 }
 
 class AudioChannelSplitter extends AudioNode native "*AudioChannelSplitter" {
 }
 
 class AudioContext native "*AudioContext" {
+  AudioContext() native;
+
 
   num currentTime;
 
   AudioDestinationNode destination;
 
   AudioListener listener;
 
   num sampleRate;
 
   RealtimeAnalyserNode createAnalyser() native;
@@ skipping 11175 matching lines @@
       startIndex = a.length - 1;
     }
     for (int i = startIndex; i >= 0; i--) {
       if (a[i] == element) {
         return i;
       }
     }
     return -1;
   }
 }