Sync FS crashy extension test

telemetry/telemetry/internal/testing/crash_extension/background.js

Index: telemetry/telemetry/internal/testing/crash_extension/background.js
diff --git a/telemetry/telemetry/internal/testing/crash_extension/background.js b/telemetry/telemetry/internal/testing/crash_extension/background.js
new file mode 100644
index 0000000000000000000000000000000000000000..568a392ddea0f17951462aa1b422b6f3affa49b7
--- /dev/null
+++ b/telemetry/telemetry/internal/testing/crash_extension/background.js
@@ -0,0 +1,14 @@
+// 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';
+
+chrome.app.runtime.onLaunched.addListener(function() {
+  chrome.app.window.create('window.html', {
+    'outerBounds': {
+      'width': 400,
+      'height': 500
+    }
+  });
+});