Rename runAsync to scheduleMicrotask.

tests/lib/async/stream_event_transformed_test.dart

Index: tests/lib/async/stream_event_transformed_test.dart
diff --git a/tests/lib/async/stream_event_transformed_test.dart b/tests/lib/async/stream_event_transformed_test.dart
index 1978bc383bd51a3089e86fe0262d830f944c9d8e..6904188c34685b14d0fe6dce0dee788b43873fc4 100644
--- a/tests/lib/async/stream_event_transformed_test.dart
+++ b/tests/lib/async/stream_event_transformed_test.dart
@@ -155,7 +155,7 @@ main() {
         completer3.complete("future3");
         Timer.run(() {
           completer1.complete("future1");
-          runAsync(closeCompleter.complete);
+          scheduleMicrotask(closeCompleter.complete);
         });
       });
     });
@@ -212,7 +212,7 @@ main() {
               subscription.pause();
               completer1.complete("future1");
               subscription.resume();
-              runAsync(closeCompleter.complete);
+              scheduleMicrotask(closeCompleter.complete);
             });
           });
         });