Support DOMString[] and regenerate from IDL

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

 
 class HTMLElement extends Element native "HTMLElement" {
 
   HTMLCollection children;
 
   DOMTokenList classList;
 
   String className;
 
   String contentEditable;
 
   String dir;
 
   bool draggable;
 
   bool hidden;
 
   String id;
 
   String innerHTML;
 
   String innerText;
 
   bool isContentEditable;
 
+  String itemId;
+
+  DOMSettableTokenList itemProp;
+
+  DOMSettableTokenList itemRef;
+
+  bool itemScope;
+
+  DOMSettableTokenList itemType;
+
+  Object itemValue;
+
   String lang;
 
   String outerHTML;
 
   String outerText;
 
   bool spellcheck;
 
   int tabIndex;
 
   String title;
 
   String webkitdropzone;
 
   Element insertAdjacentElement(String where, Element element) native;
 
   void insertAdjacentHTML(String where, String html) native;
 
   void insertAdjacentText(String where, String text) native;
 }