Rename runAsync to scheduleMicrotask.

tests/lib/async/zone_future_run_async_test.dart

 // 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.
 
 import "package:expect/expect.dart";
 import 'dart:async';
 import 'package:async_helper/async_helper.dart';
 
 main() {
   asyncStart();
   Completer done = new Completer();
 
-  // Make sure that the zones use the runAsync of their zones.
-  int runAsyncCount = 0;
+  // Make sure that the zones use the scheduleMicrotask of their zones.
+  int scheduleMicrotaskCount = 0;
   Completer completer;
   Completer completer2;
   Future future;
   Future future2;
   runZonedExperimental(() {
     completer = new Completer();
     completer.complete(499);
     completer2 = new Completer.sync();
     completer2.complete(-499);
     future = new Future.value(42);
     future2 = new Future.error(11);
-  }, onRunAsync: (f) {
-    runAsyncCount++;
-    runAsync(f);
+  }, onScheduleMicrotask: (f) {
+    scheduleMicrotaskCount++;
+    scheduleMicrotask(f);
   });
   int openCallbackCount = 0;
 
   openCallbackCount++;
   completer.future.then((x) {
     Expect.equals(499, x);
     openCallbackCount--;
     if (openCallbackCount == 0) done.complete();
   });
 
@@ skipping 12 matching lines @@
   });
 
   openCallbackCount++;
   future2.catchError((x) {
     Expect.equals(11, x);
     openCallbackCount--;
     if (openCallbackCount == 0) done.complete();
   });
 
   done.future.whenComplete(() {
-    Expect.equals(4, runAsyncCount);
+    Expect.equals(4, scheduleMicrotaskCount);
     asyncEnd();
   });
 }