Revert "Refresh dart:dom"

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

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // WARNING: Do not edit - generated code.
 
 interface HTMLButtonElement extends HTMLElement {
 
+  String get accessKey();
+
+  void set accessKey(String value);
+
   bool get autofocus();
 
   void set autofocus(bool value);
 
   bool get disabled();
 
   void set disabled(bool value);
 
   HTMLFormElement get form();
 
@@ skipping 34 matching lines @@
   void set value(String value);
 
   bool get willValidate();
 
   bool checkValidity();
 
   void click();
 
   void setCustomValidity(String error);
 }