Rename runAsync to scheduleMicrotask.

tests/lib/async/catch_errors13_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:async_helper/async_helper.dart';
 import "package:expect/expect.dart";
 import 'dart:async';
 import 'catch_errors.dart';
 
 main() {
   asyncStart();
   Completer done = new Completer();
 
   var events = [];
-  // Work around bug that makes runAsync use Timers. By invoking `runAsync` here
-  // we make sure that asynchronous non-timer events are executed before any
-  // Timer events.
-  runAsync(() { });
+  // Work around bug that makes scheduleMicrotask use Timers. By invoking
+  // `scheduleMicrotask` here we make sure that asynchronous non-timer events
+  // are executed before any Timer events.
+  scheduleMicrotask(() { });
 
-  // Test that errors are caught by nested `catchErrors`. Also uses `runAsync`
-  // in the body of a Timer.
+  // Test that errors are caught by nested `catchErrors`. Also uses
+  // `scheduleMicrotask` in the body of a Timer.
   catchErrors(() {
     events.add("catch error entry");
     catchErrors(() {
       events.add("catch error entry2");
       Timer.run(() { throw "timer error"; });
       new Timer(const Duration(milliseconds: 50),
                 () {
-                     runAsync(() { throw "runAsync"; });
+                     scheduleMicrotask(() { throw "scheduleMicrotask"; });
                      throw "delayed error";
                    });
     }).listen((x) {
       events.add(x);
-      if (x == "runAsync") {
+      if (x == "scheduleMicrotask") {
         throw "inner done throw";
       }
     });
     events.add("after inner");
     Timer.run(() { throw "timer outer"; });
     throw "inner throw";
   }).listen((x) {
       events.add(x);
       if (x == "inner done throw") done.complete(true);
     },
     onDone: () { Expect.fail("Unexpected callback"); });
 
   done.future.whenComplete(() {
     // Give callbacks time to run.
     Timer.run(() {
       Expect.listEquals([
                          "catch error entry",
                          "catch error entry2",
                          "after inner",
                          "main exit",
                          "inner throw",
                          "timer error",
                          "timer outer",
                          "delayed error",
-                         "runAsync",
+                         "scheduleMicrotask",
                          "inner done throw"
                          ],
                          events);
       asyncEnd();
     });
   });
   events.add("main exit");
 }