Change new List(n) to return fixed length list.

tools/dom/templates/html/impl/impl_Document.darttemplate

 // 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.
 
 part of $LIBRARYNAME;
 
 /**
  * The base class for all documents.
  *
  * Each web page loaded in the browser has its own [Document] object, which is
@@ skipping 43 matching lines @@
    *     var items = document.queryAll('.itemClassName');
    *
    * For details about CSS selector syntax, see the
    * [CSS selector specification](http://www.w3.org/TR/css3-selectors/).
    */
   List<Element> queryAll(String selectors) {
     if (new RegExp("""^\\[name=["'][^'"]+['"]\\]\$""").hasMatch(selectors)) {
       final mutableMatches = $dom_getElementsByName(
           selectors.substring(7,selectors.length - 2));
       int len = mutableMatches.length;
-      final copyOfMatches = new List<Element>.fixedLength(len);
+      final copyOfMatches = new List<Element>(len);
       for (int i = 0; i < len; ++i) {
         copyOfMatches[i] = mutableMatches[i];
       }
       return new _FrozenElementList._wrap(copyOfMatches);
     } else if (new RegExp("^[*a-zA-Z0-9]+\$").hasMatch(selectors)) {
       final mutableMatches = $dom_getElementsByTagName(selectors);
       int len = mutableMatches.length;
-      final copyOfMatches = new List<Element>.fixedLength(len);
+      final copyOfMatches = new List<Element>(len);
       for (int i = 0; i < len; ++i) {
         copyOfMatches[i] = mutableMatches[i];
       }
       return new _FrozenElementList._wrap(copyOfMatches);
     } else {
       return new _FrozenElementList._wrap($dom_querySelectorAll(selectors));
     }
   }
 }