Add a script for determining which DOM methods correspond to which HTML methods.

client/html/src/TouchEventWrappingImplementation.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.
 
 class TouchEventWrappingImplementation extends UIEventWrappingImplementation implements TouchEvent {
   TouchEventWrappingImplementation._wrap(ptr) : super._wrap(ptr);
 
-  TouchEvent(TouchList touches, TouchList targetTouches,
+  factory TouchEvent(TouchList touches, TouchList targetTouches,
       TouchList changedTouches, String type, Window view, int screenX,
       int screenY, int clientX, int clientY, [bool ctrlKey = false,
       bool altKey = false, bool shiftKey = false, bool metaKey = false]) {
     final e = dom.document.createEvent("TouchEvent");
     e.initTouchEvent(LevelDom.unwrap(touches), LevelDom.unwrap(targetTouches),
         LevelDom.unwrap(changedTouches), type, LevelDom.unwrap(view), screenX,
         screenY, clientX, clientY, ctrlKey, altKey, shiftKey, metaKey);
     return LevelDom.wrapTouchEvent(e);
   }
 
   bool get altKey() => _ptr.altKey;
 
   TouchList get changedTouches() => LevelDom.wrapTouchList(_ptr.changedTouches);
 
   bool get ctrlKey() => _ptr.ctrlKey;
 
   bool get metaKey() => _ptr.metaKey;
 
   bool get shiftKey() => _ptr.shiftKey;
 
   TouchList get targetTouches() => LevelDom.wrapTouchList(_ptr.targetTouches);
 
   TouchList get touches() => LevelDom.wrapTouchList(_ptr.touches);
 }