Fix bigint division (issue 23238).

tests/language/vm/regress_23238_test.dart

Index: tests/language/vm/regress_23238_test.dart
===================================================================
--- tests/language/vm/regress_23238_test.dart	(revision 0)
+++ tests/language/vm/regress_23238_test.dart	(working copy)
@@ -0,0 +1,15 @@
+// Copyright (c) 2015, 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.
+
+import "package:expect/expect.dart";
+
+void main() {
+  int x = 327680;
+  int r = 65536;
+  for (var i = 0; i < 200; i++) {
+    Expect.equals(r, x ~/ 5);
+    x *= 10;
+    r *= 10;
+  }
+}