[inspector] add async instrumentation for setTimeout in tests

test/inspector/debugger/async-set-timeout.js

Index: test/inspector/debugger/async-set-timeout.js
diff --git a/test/inspector/debugger/async-set-timeout.js b/test/inspector/debugger/async-set-timeout.js
new file mode 100644
index 0000000000000000000000000000000000000000..2b78287b7ac220d75456057fb8d39308d4a3eeb9
--- /dev/null
+++ b/test/inspector/debugger/async-set-timeout.js
@@ -0,0 +1,48 @@
+// 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.
+
+print('Checks that async stack contains setTimeout');
+
+InspectorTest.addScript(`
+var resolveCallback;
+function foo1() {
+  function inner1() {
+    debugger;
+    resolveCallback();
+  }
+  inner1();
+}
+function foo2() {
+  function inner2() {
+    setTimeout(foo1, 0);
+  }
+  inner2();
+}
+function foo3() {
+  var promise = new Promise(resolve => resolveCallback = resolve);
+  function inner3() {
+    setTimeout(foo2, 0);
+  }
+  inner3();
+  return promise;
+}
+//# sourceURL=test.js`, 7, 26);
+
+InspectorTest.setupScriptMap();
+Protocol.Debugger.onPaused(message => {
+  InspectorTest.logCallFrames(message.params.callFrames);
+  var asyncStackTrace = message.params.asyncStackTrace;
+  while (asyncStackTrace) {
+    InspectorTest.log(`-- ${asyncStackTrace.description} --`);
+    InspectorTest.logCallFrames(asyncStackTrace.callFrames);
+    asyncStackTrace = asyncStackTrace.parent;
+  }
+  InspectorTest.log('');
+  Protocol.Debugger.resume();
+});
+
+Protocol.Debugger.enable();
+Protocol.Debugger.setAsyncCallStackDepth({ maxDepth: 128 });
+Protocol.Runtime.evaluate({ expression: "foo3()//# sourceURL=expr.js", awaitPromise: true })
+  .then(InspectorTest.completeTest);