Big merge from experimental to bleeding edge.

tests/corelib/list_last_test.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.
 
 void test(List list) {
   if (list.isEmpty) {
-    Expect.throws(() => list.first, (e) => e is RangeError);
+    Expect.throws(() => list.last, (e) => e is StateError);
   } else {
-    Expect.equals(list[0], list.first);
+    Expect.equals(list[list.length - 1], list.last);
   }
 }
 
 main() {
   test([1, 2, 3]);
   test(const ["foo", "bar"]);
   test([]);
   test(const []);
 }