Change the way that events are annotated.

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 ec528984130a534052027afde63927d003ebc7ad..765c957b03f1ecae8a6fc8acd3d99163627b9522 100644
--- a/sdk/lib/web_audio/dartium/web_audio_dartium.dart
+++ b/sdk/lib/web_audio/dartium/web_audio_dartium.dart
@@ -227,7 +227,7 @@ class AudioBufferSourceNode extends AudioSourceNode {
 class AudioContext extends EventTarget {
   AudioContext.internal() : super.internal();
 
-  @DomName('AudioContext.complete')
+  @DomName('AudioContext.completeEvent')
   @DocsEditable
   static const EventStreamProvider<Event> completeEvent = const EventStreamProvider<Event>('complete');
   factory AudioContext() => _create();
@@ -406,7 +406,7 @@ class AudioContext extends EventTarget {
   @DocsEditable
   void startRendering() native "AudioContext_startRendering_Callback";
 
-  @DomName('AudioContext.complete')
+  @DomName('AudioContext.oncomplete')
   @DocsEditable
   Stream<Event> get onComplete => completeEvent.forTarget(this);