Don't put private members in dart:html interfaces.

client/html/generated/html/interface/Element.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.
 
 /**
  * Provides a Map abstraction on top of data-* attributes, similar to the
  * dataSet in the old DOM.
  */
@@ skipping 283 matching lines @@
 
   Element clone(bool deep);
 
   Element get parent();
 
 
   ElementEvents get on();
 
   static final int ALLOW_KEYBOARD_INPUT = 1;
 
-  final int _childElementCount;
-
-  final HTMLCollection _children;
-
-  String _className;
-
-  final int _clientHeight;
-
-  final int _clientLeft;
-
-  final int _clientTop;
-
-  final int _clientWidth;
-
   String contentEditable;
 
   String dir;
 
   bool draggable;
 
-  final Element _firstElementChild;
-
   bool hidden;
 
   String id;
 
   String innerHTML;
 
   final bool isContentEditable;
 
   String lang;
 
   final Element lastElementChild;
 
   final Element nextElementSibling;
 
-  final int _offsetHeight;
-
-  final int _offsetLeft;
-
   final Element offsetParent;
 
-  final int _offsetTop;
-
-  final int _offsetWidth;
-
   final String outerHTML;
 
   final Element previousElementSibling;
 
-  final int _scrollHeight;
-
-  int _scrollLeft;
-
-  int _scrollTop;
-
-  final int _scrollWidth;
-
   bool spellcheck;
 
   final CSSStyleDeclaration style;
 
   int tabIndex;
 
   final String tagName;
 
   String title;
 
   bool translate;
 
   final String webkitRegionOverflow;
 
   String webkitdropzone;
 
   void blur();
 
   void click();
 
   void focus();
 
-  String _getAttribute(String name);
-
-  ClientRect _getBoundingClientRect();
-
-  ClientRectList _getClientRects();
-
-  bool _hasAttribute(String name);
-
   Element insertAdjacentElement(String where, Element element);
 
   void insertAdjacentHTML(String where, String html);
 
   void insertAdjacentText(String where, String text);
 
   Element query(String selectors);
 
-  NodeList _querySelectorAll(String selectors);
-
-  void _removeAttribute(String name);
-
   void scrollByLines(int lines);
 
   void scrollByPages(int pages);
 
   void scrollIntoView([bool centerIfNeeded]);
 
-  void _setAttribute(String name, String value);
-
   bool matchesSelector(String selectors);
 
   void webkitRequestFullScreen(int flags);
 
 }
 
 interface ElementEvents extends Events {
 
   EventListenerList get abort();
 
@@ skipping 82 matching lines @@
   EventListenerList get touchEnd();
 
   EventListenerList get touchLeave();
 
   EventListenerList get touchMove();
 
   EventListenerList get touchStart();
 
   EventListenerList get transitionEnd();
 }