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

tools/dom/src/Serialization.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.
 
 // Patch file for the dart:isolate library.
 
 part of html;
 
 /********************************************************
   Inserted from lib/isolate/serialization.dart
@@ skipping 80 matching lines @@
     int id = _nextFreeRefId++;
     _visited[map] = id;
     var keys = _serializeList(map.keys.toList());
     var values = _serializeList(map.values.toList());
     // TODO(floitsch): we are losing the generic type.
     return ['map', id, keys, values];
   }
 
   _serializeList(List list) {
     int len = list.length;
-    var result = new List.fixedLength(len);
+    var result = new List(len);
     for (int i = 0; i < len; i++) {
       result[i] = _dispatch(list[i]);
     }
     return result;
   }
 }
 
 /** Deserializes arrays created with [_Serializer]. */
 abstract class _Deserializer {
   Map<int, dynamic> _deserialized;
@@ skipping 59 matching lines @@
   }
 
   deserializeSendPort(List x);
 
   deserializeObject(List x) {
     // TODO(floitsch): Use real exception (which one?).
     throw "Unexpected serialized object";
   }
 }