Set runtime type on list and map literals.

tests/language/map_literal12_test.dart

 // 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.
+// Dart test program for testing the instanceof operation.
 
 import "package:expect/expect.dart";
 
 main() {
-  Expect.isNull(const int.fromEnvironment('NOT_FOUND'));
-  Expect.equals(12345, const int.fromEnvironment('NOT_FOUND',
-                                                 defaultValue: 12345));
+  var x = <int, String>{};
+  Expect.isTrue(x is Map<int, String>);
+  Expect.isFalse(x is Map<double, String>);
+  Expect.isFalse(x is Map<int, double>);
 }