Some new/fixed async tests

test/mjsunit/harmony/debug-async-function-async-task-event.js

-// Copyright 2014 the V8 project authors. All rights reserved.
+// Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --expose-debug-as debug
+// Flags: --harmony-async-await --expose-debug-as debug --allow-natives-syntax
 
 Debug = debug.Debug;
 
 var base_id = -1;
 var exception = null;
 var expected = [
   "enqueue #1",
   "willHandle #1",
   "then #1",
   "enqueue #2",
+  "enqueue #3",
   "didHandle #1",
   "willHandle #2",
   "then #2",
-  "enqueue #3",
   "didHandle #2",
   "willHandle #3",
-  "didHandle #3"
+  "enqueue #4",
+  "didHandle #3",
+  "willHandle #4",
+  "didHandle #4",
 ];
 
 function assertLog(msg) {
   print(msg);
   assertTrue(expected.length > 0);
   assertEquals(expected.shift(), msg);
   if (!expected.length) {
     Debug.setListener(null);
   }
 }
 
 function listener(event, exec_state, event_data, data) {
   if (event != Debug.DebugEvent.AsyncTaskEvent) return;
   try {
     if (base_id < 0)
       base_id = event_data.id();
     var id = event_data.id() - base_id + 1;
-    assertEquals("Promise.resolve", event_data.name());
+    assertTrue("Promise.resolve" == event_data.name() ||
+               "PromiseResolveThenableJob" == event_data.name());
     assertLog(event_data.type() + " #" + id);
   } catch (e) {
     print(e + e.stack)
     exception = e;
   }
 }
 
 Debug.setListener(listener);
 
 var resolver;
 var p = new Promise(function(resolve, reject) {
   resolver = resolve;
 });
-p.then(function() {
+
+async function main() {
+  await p;
   assertLog("then #1");
-}).then(function() {
+  await undefined;
   assertLog("then #2");
-});
+}
+main();
 resolver();
 
+%RunMicrotasks();
+
 assertNull(exception);