Change List constructors.

sdk/lib/_internal/compiler/implementation/lib/isolate_patch.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.
 
 import 'dart:uri';
 
 /**
  * Called by the compiler to support switching
@@ skipping 1093 matching lines @@
 
   visitPrimitive(x) => x;
 
   List visitList(List list) {
     List copy = _visited[list];
     if (copy != null) return copy;
 
     int len = list.length;
 
     // TODO(floitsch): we loose the generic type of the List.
-    copy = new List(len);
+    copy = new List.fixedLength(len);
     _visited[list] = copy;
     for (int i = 0; i < len; i++) {
       copy[i] = _dispatch(list[i]);
     }
     return copy;
   }
 
   Map visitMap(Map map) {
     Map copy = _visited[map];
     if (copy != null) return copy;
@@ skipping 33 matching lines @@
     int id = _nextFreeRefId++;
     _visited[map] = id;
     var keys = _serializeList(map.keys);
     var values = _serializeList(map.values);
     // TODO(floitsch): we are losing the generic type.
     return ['map', id, keys, values];
   }
 
   _serializeList(List list) {
     int len = list.length;
-    var result = new List(len);
+    var result = new List.fixedLength(len);
     for (int i = 0; i < len; i++) {
       result[i] = _dispatch(list[i]);
     }
     return result;
   }
 }
 
 /** Deserializes arrays created with [_Serializer]. */
 class _Deserializer {
   Map<int, dynamic> _deserialized;
@@ skipping 105 matching lines @@
       _window.clearTimeout(_handle);
     } else {
       _window.clearInterval(_handle);
     }
   }
 }
 
 Timer _timerFactory(int millis, void callback(Timer timer), bool repeating) =>
   repeating ? new _Timer.repeating(millis, callback)
             : new _Timer(millis, callback);