[inspector] test for fixed empty stack processing in console.count

BUG=chromium:644629
R=dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2370033003
Cr-Commit-Position: refs/heads/master@{#39938}

test/inspector/debugger/async-console-count-doesnt-crash-expected.txt

+setTimeout(console.count, 0) doesn't crash with enabled async stacks.

test/inspector/debugger/async-console-count-doesnt-crash.js

+// 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("setTimeout(console.count, 0) doesn't crash with enabled async stacks.")
+
+InspectorTest.sendCommand("Debugger.enable", {});
+InspectorTest.sendCommand("Debugger.setAsyncCallStackDepth", { maxDepth: 1 });
+InspectorTest.sendCommand("Runtime.evaluate", { expression: "setTimeout(console.count, 0)" });
+InspectorTest.completeTestAfterPendingTimeouts();

test/inspector/protocol-test.js

@@ -156,6 +156,13 @@ InspectorTest.logMessage = function(message)
 
 InspectorTest.completeTest = quit.bind(null);
 
+InspectorTest.completeTestAfterPendingTimeouts = function()
+{
+  InspectorTest.sendCommand("Runtime.evaluate", {
+    expression: "new Promise(resolve => setTimeout(resolve, 0))",
+    awaitPromise: true }, InspectorTest.completeTest);
+}
+
 InspectorTest.evaluateInPage = function(string, callback)
 {
   InspectorTest.sendCommand("Runtime.evaluate", { "expression": string }, function(message) {