Rename runAsync to scheduleMicrotask.

tests/lib/async/zone_debug_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 'package:async_helper/async_helper.dart';
 import 'dart:async';
 
 import 'dart:collection';
 
@@ skipping 61 matching lines @@
   Zone forked;
   forked = Zone.current.fork(specification: DEBUG_SPECIFICATION);
 
   asyncStart();
 
   int openTests = 0;
 
   openTests++;
   forked.run(() {
     int forkTrace = stackTrace;
-    runAsync(() {
-      int runAsyncTrace = stackTrace;
-      runAsync(() {
-        expectedDebugTrace = [runAsyncTrace, forkTrace];
+    scheduleMicrotask(() {
+      int scheduleMicrotaskTrace = stackTrace;
+      scheduleMicrotask(() {
+        expectedDebugTrace = [scheduleMicrotaskTrace, forkTrace];
         openTests--;
         if (openTests == 0) {
           done.complete();
         }
         throw "foo";
       });
       expectedDebugTrace = [forkTrace];
       throw "bar";
     });
   });
 
   Expect.listEquals([], restoredStackTrace);
   Zone forked2 = forked.fork();
   Zone forked3 = forked2.fork();
   int fork2Trace;
   int fork3Trace;
   var f2;
   var globalTrace = stackTrace;
   var f = forked3.bindCallback(() {
     Expect.identical(forked3, Zone.current);
     fork2Trace = stackTrace;
     f2 = forked2.bindCallback(() {
       Expect.identical(forked2, Zone.current);
       Expect.listEquals([fork2Trace, globalTrace], restoredStackTrace);
       fork3Trace = stackTrace;
       openTests--;
       if (openTests == 0) {
         done.complete();
       }
-      runAsync(() {
+      scheduleMicrotask(() {
         expectedDebugTrace = [fork3Trace, fork2Trace, globalTrace];
         throw "gee";
       });
     }, runGuarded: false);
   }, runGuarded: false);
   openTests++;
   f();
   f2();
 
   done.future.whenComplete(() {
     // We don't really care for the order.
     events.sort();
     Expect.listEquals([ "handling uncaught error bar",
                         "handling uncaught error foo",
                         "handling uncaught error gee"],
                       events);
     asyncEnd();
   });
 }