Add tests for list and async marker

tests/compiler/dart2js/inference/data/async_marker.dart

Index: tests/compiler/dart2js/inference/data/async_marker.dart
diff --git a/tests/compiler/dart2js/inference/data/async_marker.dart b/tests/compiler/dart2js/inference/data/async_marker.dart
new file mode 100644
index 0000000000000000000000000000000000000000..d7d41f69cf341e1ee07002cbc4359be1eda544f5
--- /dev/null
+++ b/tests/compiler/dart2js/inference/data/async_marker.dart
@@ -0,0 +1,19 @@
+// Copyright (c) 2017, 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:[null]*/
+main() {
+  asyncMethod();
+  asyncStarMethod();
+  syncStarMethod();
+}
+
+/*asyncMethod:[exact=_Future]*/
+asyncMethod() async {}
+
+/*asyncStarMethod:[exact=_ControllerStream]*/
+asyncStarMethod() async* {}
+
+/*syncStarMethod:[exact=_SyncStarIterable]*/
+syncStarMethod() sync* {}