Turn on webaudio for JS backends.

client/dom/generated/src/wrapping/_AudioProcessingEventWrappingImplementation.dart

Index: client/dom/generated/src/wrapping/_AudioProcessingEventWrappingImplementation.dart
diff --git a/client/dom/generated/src/wrapping/_AudioProcessingEventWrappingImplementation.dart b/client/dom/generated/src/wrapping/_AudioProcessingEventWrappingImplementation.dart
new file mode 100644
index 0000000000000000000000000000000000000000..ee0f4ae9265167c2d0d155e7a999b9f555390960
--- /dev/null
+++ b/client/dom/generated/src/wrapping/_AudioProcessingEventWrappingImplementation.dart
@@ -0,0 +1,21 @@
+// 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.
+
+// WARNING: Do not edit - generated code.
+
+class _AudioProcessingEventWrappingImplementation extends _EventWrappingImplementation implements AudioProcessingEvent {
+  _AudioProcessingEventWrappingImplementation() : super() {}
+
+  static create__AudioProcessingEventWrappingImplementation() native {
+    return new _AudioProcessingEventWrappingImplementation();
+  }
+
+  AudioBuffer get inputBuffer() { return _get_inputBuffer(this); }
+  static AudioBuffer _get_inputBuffer(var _this) native;
+
+  AudioBuffer get outputBuffer() { return _get_outputBuffer(this); }
+  static AudioBuffer _get_outputBuffer(var _this) native;
+
+  String get typeName() { return "AudioProcessingEvent"; }
+}