Add AudioElement constructor to dart:html

lib/dom/templates/html/interface/interface_AudioContext.darttemplate

Index: lib/dom/templates/html/interface/interface_AudioContext.darttemplate
diff --git a/lib/dom/templates/html/interface/interface_AudioContext.darttemplate b/lib/dom/templates/html/interface/interface_AudioContext.darttemplate
new file mode 100644
index 0000000000000000000000000000000000000000..4c9be0cc0756b44e19b0f1e85f51bc197f5097df
--- /dev/null
+++ b/lib/dom/templates/html/interface/interface_AudioContext.darttemplate
@@ -0,0 +1,10 @@
+// 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
+// BSD-style license that can be found in the LICENSE file.
+
+// WARNING: Do not edit - generated code.
+
+$!COMMENT
+interface $ID$EXTENDS default _$(ID)FactoryProvider {
+  $ID();
+$!MEMBERS}