Extension SW - add test for ServiceWorkerRegistration.sync.

content/public/test/background_sync_test_util.h

Index: content/public/test/background_sync_test_util.h
diff --git a/content/public/test/background_sync_test_util.h b/content/public/test/background_sync_test_util.h
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+++ b/content/public/test/background_sync_test_util.h
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+// Copyright 2015 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.
+
+#ifndef CONTENT_PUBLIC_TEST_BACKGROUND_SYNC_TEST_UTILS_H_
+#define CONTENT_PUBLIC_TEST_BACKGROUND_SYNC_TEST_UTILS_H_
+
+namespace content {
+class WebContents;
+
+// Utility namespace for background sync tests.
+namespace background_sync_test_util {
+
+// Enables or disables notifications coming from the NetworkChangeNotifier.
+// (For preventing flakes in tests)
+void SetIgnoreNetworkChangeNotifier(bool ignore);
+
+// Puts background sync manager into online or offline mode for tests.
+//
+// This eventually (asynchronously) runs on the IO thread. However you can
+// start performing background sync operations without waiting for the IO
+// thread task to complete, since those background sync operations also run
+// on the IO thread.
+void SetOnline(WebContents* web_contents, bool online);
+
+}  // namespace background_sync_test_util
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_TEST_BACKGROUND_SYNC_TEST_UTILS_H_