Add internal operation that converts a growable list to a fixed list.

runtime/lib/internal_patch.dart

Index: runtime/lib/internal_patch.dart
diff --git a/runtime/lib/internal_patch.dart b/runtime/lib/internal_patch.dart
index c4618bc60b69a7cac8d7ddacd25c37ea3840f96a..248db3e66be847d2517c3fd3663a473baeb928fe 100644
--- a/runtime/lib/internal_patch.dart
+++ b/runtime/lib/internal_patch.dart
@@ -1,3 +1,13 @@
 // Copyright (c) 2013, 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 List makeListFixedLength(List growableList)
+    => _StaticClass.makeListFixedLength(growableList);
+
+// Making the native method static, not top-level.
+// See http://dartbug.com/6997
+class _StaticClass {
+  static List makeListFixedLength(List growableList)
+    native "GrowableList_toFixedLength";

[srdjan, 2014/02/10 10:08:15]

We have (mostly) standardized native names. In this case it should be called
"StaticClass_makeListFixedLength".

[Lasse Reichstein Nielsen, 2014/02/10 11:42:23]

Done.

+}