Move frog dart:dom from fields to getters/setters.

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

Index: client/dom/generated/src/frog/WebSocket.dart
diff --git a/client/dom/generated/src/frog/WebSocket.dart b/client/dom/generated/src/frog/WebSocket.dart
index 2ebe51181b24568fe5560f2640ef8185cd2bab2b..c9c644c76ebddc7538aa0d02f675fb5ca501f716 100644
--- a/client/dom/generated/src/frog/WebSocket.dart
+++ b/client/dom/generated/src/frog/WebSocket.dart
@@ -11,17 +11,19 @@ class WebSocket native "*WebSocket" {
 
   static final int OPEN = 1;
 
-  String URL;
+  String get URL() native "return this.URL;";
 
-  String binaryType;
+  String get binaryType() native "return this.binaryType;";
 
-  int bufferedAmount;
+  void set binaryType(String value) native "this.binaryType = value;";
 
-  String extensions;
+  int get bufferedAmount() native "return this.bufferedAmount;";
 
-  String protocol;
+  String get extensions() native "return this.extensions;";
 
-  int readyState;
+  String get protocol() native "return this.protocol;";
+
+  int get readyState() native "return this.readyState;";
 
   void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;