Updating dwc for breaking changes that will be part of the next sdk

lib/src/html5_utils.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.
 
 // TODO(jmesserly): html5lib might be a better home for this.
 // But at the moment we only need it here.
 
 library html5_utils;
 
 
@@ skipping 18 matching lines @@
  * However there does not appear to be the last subtypes for the following tags:
  * command, data, dialog, td, th, and time.
  */
 const htmlElementNames = const {
   'a': 'html.AnchorElement',
   'abbr': 'html.Element',
   'address': 'html.Element',
   'area': 'html.AreaElement',
   'article': 'html.Element',
   'aside': 'html.Element',
-  'audio': 'web_audio.AudioElement',
+  'audio': 'html.AudioElement',
   'b': 'html.Element',
   'base': 'html.BaseElement',
   'bdi': 'html.Element',
   'bdo': 'html.Element',
   'blockquote': 'html.QuoteElement',
   'body': 'html.BodyElement',
   'br': 'html.BRElement',
   'button': 'html.ButtonElement',
   'canvas': 'html.CanvasElement',
   'caption': 'html.TableCaptionElement',
@@ skipping 104 matching lines @@
   'action',     // in form
   'cite',       // in blockquote, del, ins, q
   'data',       // in object
   'formaction', // in button, input
   'href',       // in a, area, link, base, command
   'manifest',   // in html
   'poster',     // in video
   'src',        // in audio, embed, iframe, img, input, script, source, track,
                 //    video
 ];