Support DOMString[] and regenerate from IDL

client/dom/generated/src/wrapping/_WebSocketWrappingImplementation.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 _WebSocketWrappingImplementation extends DOMWrapperBase implements WebSocket {
   _WebSocketWrappingImplementation() : super() {}
 
   static create__WebSocketWrappingImplementation() native {
     return new _WebSocketWrappingImplementation();
   }
 
   String get URL() { return _get__WebSocket_URL(this); }
   static String _get__WebSocket_URL(var _this) native;
 
   String get binaryType() { return _get__WebSocket_binaryType(this); }
   static String _get__WebSocket_binaryType(var _this) native;
 
   void set binaryType(String value) { _set__WebSocket_binaryType(this, value); }
   static void _set__WebSocket_binaryType(var _this, String value) native;
 
   int get bufferedAmount() { return _get__WebSocket_bufferedAmount(this); }
   static int _get__WebSocket_bufferedAmount(var _this) native;
 
+  String get extensions() { return _get__WebSocket_extensions(this); }
+  static String _get__WebSocket_extensions(var _this) native;
+
   EventListener get onclose() { return _get__WebSocket_onclose(this); }
   static EventListener _get__WebSocket_onclose(var _this) native;
 
   void set onclose(EventListener value) { _set__WebSocket_onclose(this, value); }
   static void _set__WebSocket_onclose(var _this, EventListener value) native;
 
   EventListener get onerror() { return _get__WebSocket_onerror(this); }
   static EventListener _get__WebSocket_onerror(var _this) native;
 
   void set onerror(EventListener value) { _set__WebSocket_onerror(this, value); }
@@ skipping 67 matching lines @@
   static void _removeEventListener(receiver, type, listener) native;
   static void _removeEventListener_2(receiver, type, listener, useCapture) native;
 
   bool send(String data) {
     return _send(this, data);
   }
   static bool _send(receiver, data) native;
 
   String get typeName() { return "WebSocket"; }
 }