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

client/html/src/_FactoryProviders.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.
 
 
 // These factory methods could all live in one factory provider class but dartc
 // has a bug (5399939) preventing that.
 
 class _FileReaderFactoryProvider {
 
   factory FileReader() {
     return new dom.FileReader();
   }
 }
 
 class _CSSMatrixFactoryProvider {
 
   factory CSSMatrix([String spec = '']) {
     return new CSSMatrixWrappingImplementation._wrap(
         new dom.WebKitCSSMatrix(spec));
   }
 }
 
 class _PointFactoryProvider {
 
+  /** @domName DOMWindow.createWebKitPoint */
   factory Point(num x, num y) {
     return new PointWrappingImplementation._wrap(new dom.WebKitPoint(x, y));
   }
 }