Fixed the HTML doc breakage.

utils/apidoc/html_diff.dart

 // Copyright (c) 2012, 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');
 
 #import('dart:coreimpl');
 #import('dart:io');
 
 // TODO(rnystrom): Use "package:" URL (#4968).
 #import('../../pkg/dartdoc/lib/dartdoc.dart');
 #import('../../pkg/dartdoc/lib/mirrors.dart');
 #import('../../pkg/dartdoc/lib/mirrors_util.dart');
 
+// TODO(amouravski): There is currently magic that looks at dart:* libraries
+// rather than the declared library names. This changed due to recent syntax
+// changes. We should only need to look at the library 'html'.
 const HTML_LIBRARY_NAME = 'dart:html';
+const HTML_DECLARED_NAME = 'html';
 
 /**
  * A class for computing a many-to-many mapping between the types and
  * members in `dart:html` and the MDN DOM types. This mapping is
  * based on two indicators:
  *
  *   1. Auto-detected wrappers. Most `dart:html` types correspond
  *      straightforwardly to a single `@domName` type, and
  *      have the same name.  In addition, most `dart:html` methods
  *      just call a single `@domName` method. This class
@@ skipping 55 matching lines @@
     }
   }
 
   /**
    * Computes the `@domName` to `dart:html` mapping, and
    * places it in [htmlToDom] and [htmlTypesToDom]. Before this is run, dart2js
    * should be initialized (via [parseOptions] and [initializeWorld]) and
    * [HtmlDiff.initialize] should be called.
    */
   void run() {
-    LibraryMirror htmlLib = _mirrors.libraries[HTML_LIBRARY_NAME];
+    LibraryMirror htmlLib = _mirrors.libraries[HTML_DECLARED_NAME];
     if (htmlLib === null) {
       warn('Could not find $HTML_LIBRARY_NAME');
       return;
     }
     for (InterfaceMirror htmlType in htmlLib.types.getValues()) {
       final domTypes = htmlToDomTypes(htmlType);
       if (domTypes.isEmpty()) continue;
 
       htmlTypesToDom.putIfAbsent(htmlType.qualifiedName,
           () => new Set()).addAll(domTypes);
@@ skipping 119 matching lines @@
   Map<String, String> _getTags(String comment) {
     if (comment == null) return const <String, String>{};
     final re = const RegExp("@([a-zA-Z]+) ([^;]+)(?:;|\$)");
     final tags = <String, String>{};
     for (var m in re.allMatches(comment.trim())) {
       tags[m[1]] = m[2];
     }
     return tags;
   }
 }