Migrated test block 12 to Dart 2.0.

tests/corelib/iterable_test.dart

Index: tests/corelib/iterable_test.dart
diff --git a/tests/corelib/iterable_test.dart b/tests/corelib/iterable_test.dart
deleted file mode 100644
index e7f6299c0ae684e468878327cf541f2ba87e0c7f..0000000000000000000000000000000000000000
--- a/tests/corelib/iterable_test.dart
+++ /dev/null
@@ -1,18 +0,0 @@
-// 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.
-
-// Regression test for dart2js where [List.addAll] was not typed
-// correctly.
-
-import "package:expect/expect.dart";
-
-import 'dart:collection';
-
-class MyIterable extends IterableBase {
-  get iterator => [].iterator;
-}
-
-main() {
-  Expect.isTrue(([]..addAll(new MyIterable())).isEmpty);
-}