Turn on webaudio for JS backends.

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

+// 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 _AudioNodeWrappingImplementation extends DOMWrapperBase implements AudioNode {
+  _AudioNodeWrappingImplementation() : super() {}
+
+  static create__AudioNodeWrappingImplementation() native {
+    return new _AudioNodeWrappingImplementation();
+  }
+
+  AudioContext get context() { return _get_context(this); }
+  static AudioContext _get_context(var _this) native;
+
+  int get numberOfInputs() { return _get_numberOfInputs(this); }
+  static int _get_numberOfInputs(var _this) native;
+
+  int get numberOfOutputs() { return _get_numberOfOutputs(this); }
+  static int _get_numberOfOutputs(var _this) native;
+
+  void connect(AudioNode destination, [int output = null, int input = null]) {
+    if (output === null) {
+      if (input === null) {
+        _connect(this, destination);
+        return;
+      }
+    } else {
+      if (input === null) {
+        _connect_2(this, destination, output);
+        return;
+      } else {
+        _connect_3(this, destination, output, input);
+        return;
+      }
+    }
+    throw "Incorrect number or type of arguments";
+  }
+  static void _connect(receiver, destination) native;
+  static void _connect_2(receiver, destination, output) native;
+  static void _connect_3(receiver, destination, output, input) native;
+
+  void disconnect([int output = null]) {
+    if (output === null) {
+      _disconnect(this);
+      return;
+    } else {
+      _disconnect_2(this, output);
+      return;
+    }
+  }
+  static void _disconnect(receiver) native;
+  static void _disconnect_2(receiver, output) native;
+
+  String get typeName() { return "AudioNode"; }
+}