Fix for bug 14923

sdk/lib/web_audio/dartium/web_audio_dartium.dart

Index: sdk/lib/web_audio/dartium/web_audio_dartium.dart
diff --git a/sdk/lib/web_audio/dartium/web_audio_dartium.dart b/sdk/lib/web_audio/dartium/web_audio_dartium.dart
index 8e581b0d5b74d45a700c673e2b9281038a980222..aa737b554c0c3ed1e10a9ea7b20b7ae49b2d7fdc 100644
--- a/sdk/lib/web_audio/dartium/web_audio_dartium.dart
+++ b/sdk/lib/web_audio/dartium/web_audio_dartium.dart
@@ -479,14 +479,6 @@ class AudioContext extends EventTarget {
   @DocsEditable()
   void _decodeAudioData(ByteBuffer audioData, AudioBufferCallback successCallback, [AudioBufferCallback errorCallback]) native "AudioContext_decodeAudioData_Callback";
 
-  Future<AudioBuffer> decodeAudioData(ByteBuffer audioData) {
-    var completer = new Completer<AudioBuffer>();
-    _decodeAudioData(audioData,
-        (value) { completer.complete(value); },
-        (error) { completer.completeError(error); });
-    return completer.future;
-  }
-
   @DomName('AudioContext.startRendering')
   @DocsEditable()
   void startRendering() native "AudioContext_startRendering_Callback";
@@ -511,6 +503,20 @@ class AudioContext extends EventTarget {
   @DocsEditable()
   Stream<Event> get onComplete => completeEvent.forTarget(this);
 
+  @DomName('AudioContext.decodeAudioData')
+  Future<AudioBuffer> decodeAudioData(ByteBuffer audioData) {
+    var completer = new Completer<AudioBuffer>();
+    _decodeAudioData(audioData,
+        (value) { completer.complete(value); },
+        (error) {
+          if (error == null) {
+            completer.completeError('');
+          } else {
+            completer.completeError(error);
+          }
+        });
+    return completer.future;
+  }
 }
 // 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