Sync FS crashy extension test

telemetry/telemetry/internal/testing/crash_extension/window.js

Index: telemetry/telemetry/internal/testing/crash_extension/window.js
diff --git a/telemetry/telemetry/internal/testing/crash_extension/window.js b/telemetry/telemetry/internal/testing/crash_extension/window.js
new file mode 100644
index 0000000000000000000000000000000000000000..0df15daf68113970970b8484a61a58daf4834db1
--- /dev/null
+++ b/telemetry/telemetry/internal/testing/crash_extension/window.js
@@ -0,0 +1,10 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+'use strict';
+
+console.log('hello window');
+document.querySelector('button').addEventListener('click', function() {
+  var w = new Worker('worker.js');
+});