Revert "Refresh dart:dom"

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

 
 class HTMLButtonElement extends HTMLElement native "*HTMLButtonElement" {
 
+  String accessKey;
+
   bool autofocus;
 
   bool disabled;
 
   HTMLFormElement form;
 
   String formAction;
 
   String formEnctype;
 
@@ skipping 16 matching lines @@
   String value;
 
   bool willValidate;
 
   bool checkValidity() native;
 
   void click() native;
 
   void setCustomValidity(String error) native;
 }