Create profile_sync_test_util in components

components/browser_sync/browser/profile_sync_test_util.cc

+// 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.
+
+#include "components/browser_sync/browser/profile_sync_test_util.h"
+
+namespace browser_sync {
+
+void EmptyNetworkTimeUpdate(const base::Time&,
+                            const base::TimeDelta&,
+                            const base::TimeDelta&) {}
+
+SyncServiceObserverMock::SyncServiceObserverMock() {}
+
+SyncServiceObserverMock::~SyncServiceObserverMock() {}
+
+}  // namespace browser_sync