Big merge from experimental to bleeding edge.

tests/corelib/map_values2_test.dart

+// Copyright (c) 2011, 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.
+
+main() {
+  var map1 = <String, int>{ "foo": 42, "bar": 499 };
+  var map2 = <String, int>{};
+  var map3 = const <String, int>{ "foo": 42, "bar": 499 };
+  var map4 = const <String, int>{};
+  var map5 = new Map<String, int>();
+  map5["foo"] = 43;
+  map5["bar"] = 500;
+  var map6 = new Map<String, int>();
+
+  Expect.isTrue(map1.values is Iterable<int>);
+  Expect.isFalse(map1.values is Iterable<bool>);
+  Expect.isFalse(map1.values is List);
+  Expect.equals(2, map1.values.length);
+  Expect.equals(42, map1.values.first);
+  Expect.equals(499, map1.values.last);
+
+  Expect.isTrue(map2.values is Iterable<int>);
+  Expect.isFalse(map2.values is Iterable<bool>);
+  Expect.isFalse(map2.values is List);
+  Expect.equals(0, map2.values.length);
+
+  Expect.isTrue(map3.values is Iterable<int>);
+  Expect.isFalse(map3.values is Iterable<bool>);
+  Expect.isFalse(map3.values is List);
+  Expect.equals(2, map3.values.length);
+  Expect.equals(42, map3.values.first);
+  Expect.equals(499, map3.values.last);
+
+  Expect.isTrue(map4.values is Iterable<int>);
+  Expect.isFalse(map4.values is Iterable<bool>);
+  Expect.isFalse(map4.values is List);
+  Expect.equals(0, map4.values.length);
+
+  Expect.isTrue(map5.values is Iterable<int>);
+  Expect.isFalse(map5.values is Iterable<bool>);
+  Expect.isFalse(map5.values is List);
+  Expect.equals(2, map5.values.length);
+  Expect.isTrue(map5.values.first == 43 || map5.values.first == 500);
+  Expect.isTrue(map5.values.last == 43 || map5.values.first == 500);
+  Expect.notEquals(map5.values.first, map5.values.last);
+
+  Expect.isTrue(map6.values is Iterable<int>);
+  Expect.isFalse(map6.values is Iterable<bool>);
+  Expect.isFalse(map6.values is List);
+  Expect.equals(0, map6.values.length);
+}