Fix apidoc to work with latest frog.

utils/apidoc/html_diff.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.
 
 /**
  * A script to assist in documenting the difference between the dart:html API
  * and the old DOM API.
  */
 #library('html_diff');
 
@@ skipping 146 matching lines @@
    * `dart:htmlimpl`, or `null` if there is no such correspondence.
    */
   Member htmlImplToHtmlMember(Member implMember) {
     var htmlType = htmlImplToHtmlType(implMember.declaringType);
     if (htmlType == null) return null;
 
     bool getter, setter;
     if (implMember.isConstructor || implMember.isFactory) {
       var constructor = htmlType.constructors[implMember.name];
       if (constructor != null) return constructor;
-      return htmlType.factories[implMember.name];
+
+      // Look for a factory constructor whose type and name matches the member.
+      return htmlType.factories.getFactoriesFor(implMember.name)[
+          implMember.constructorName];
     } else if ((getter = implMember.name.startsWith('get:')) ||
         (setter = implMember.name.startsWith('set:'))) {
       // Use getMember to follow interface inheritance chains.
       var htmlProperty = htmlType.getMember(implMember.name.substring(4));
       if (htmlProperty != null) {
         return getter ? htmlProperty.getter : htmlProperty.setter;
       } else {
         return null;
       }
     } else {
@@ skipping 213 matching lines @@
   Map<String, String> _getTags(String comment) {
     if (comment == null) return const <String>{};
     final re = new RegExp("@([a-zA-Z]+) ([^;]+)(?:;|\$)");
     final tags = <String>{};
     for (var m in re.allMatches(comment.trim())) {
       tags[m[1]] = m[2];
     }
     return tags;
   }
 }