Support DOMString[] and regenerate from IDL

client/dom/generated/src/frog/WebSocket.dart

 
 class WebSocket native "WebSocket" {
 
   String URL;
 
   String binaryType;
 
   int bufferedAmount;
 
+  String extensions;
+
   EventListener onclose;
 
   EventListener onerror;
 
   EventListener onmessage;
 
   EventListener onopen;
 
   String protocol;
 
   int readyState;
 
   void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
 
   void close([int code = null, String reason = null]) native;
 
   bool dispatchEvent(Event evt) native;
 
   void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
 
   bool send(String data) native;
 
   var dartObjectLocalStorage;
 
   String get typeName() native;
 }