Frog DOM changes to support OLS on Storage objects

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

 
 class Storage native "*Storage" {
 
   int length;
 
   void clear() native;
 
   String getItem(String key) native;
 
   String key(int index) native;
 
   void removeItem(String key) native;
 
   void setItem(String key, String data) native;
 
-  var dartObjectLocalStorage;
+  var get dartObjectLocalStorage() native """
+    if (this === window.localStorage)
+      return window._dartLocalStorageLocalStorage;
+    else if (this === window.sessionStorage)
+      return window._dartSessionStorageLocalStorage;
+    else
+      throw new UnsupportedOperationException('Cannot dartObjectLocalStorage for unknown Storage object.');
+""";
+
+  void set dartObjectLocalStorage(var value) native """
+    if (this === window.localStorage)
+      window._dartLocalStorageLocalStorage = value;
+    else if (this === window.sessionStorage)
+      window._dartSessionStorageLocalStorage = value;
+    else
+      throw new UnsupportedOperationException('Cannot dartObjectLocalStorage for unknown Storage object.');
+""";
 
   String get typeName() native;
 }