Reapply "Zone support for Futures, Timer, Streams."

tests/lib/async/run_zoned1_test.dart

Index: tests/lib/async/run_zoned1_test.dart
diff --git a/tests/language/closure_in_field_initializer_test.dart b/tests/lib/async/run_zoned1_test.dart
similarity index 64%
copy from tests/language/closure_in_field_initializer_test.dart
copy to tests/lib/async/run_zoned1_test.dart
index bf0198aa4b3ae78e6ad50f19e4e08a573daf80d4..71af2346c69ce7add4f4f8c5b030b2ca02385c73 100644
--- a/tests/language/closure_in_field_initializer_test.dart
+++ b/tests/lib/async/run_zoned1_test.dart
@@ -3,14 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 
 import "package:expect/expect.dart";
-
-class Foo {
-  var closures = {
-    'a': (x, y) => x + y
-  };
-}
+import 'dart:async';
 
 main() {
-  var closures = new Foo().closures;
-  Expect.equals(6, closures['a'](4, 2));
+  // Make sure `runZoned` returns the result of a synchronous call.
+  Expect.equals(499, runZonedExperimental(() => 499));
 }