Ignore non-content divs in htmlToText.

dart/site/try/src/shadow_root.dart

 // Copyright (c) 2014, 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.
 
 library trydart.shadow_root;
 
 import 'dart:html';
 
 import 'selection.dart' show
     TrySelection;
@@ skipping 31 matching lines @@
     List<Node> polyfill = root.querySelectorAll('[try-dart-shadow-root]');
     for (Element element in polyfill) {
       element.remove();
     }
   }
 }
 
 String getText(Element node) {
   if (ShadowRoot.supported) return node.text;
   StringBuffer buffer = new StringBuffer();
-  htmlToText(node, buffer, new TrySelection.empty(node));
+  htmlToText(
+      node, buffer, new TrySelection.empty(node), treatRootAsInline: true);
   return '$buffer';
 }