[iOS] Upstream SyncSetupService (and mock)

ios/chrome/browser/sync/sync_setup_service_mock.cc

Index: ios/chrome/browser/sync/sync_setup_service_mock.cc
diff --git a/ios/chrome/browser/sync/sync_setup_service_mock.cc b/ios/chrome/browser/sync/sync_setup_service_mock.cc
new file mode 100644
index 0000000000000000000000000000000000000000..39be8b7c1486b5bfddb049059a802a1df2af9508
--- /dev/null
+++ b/ios/chrome/browser/sync/sync_setup_service_mock.cc
@@ -0,0 +1,14 @@
+// Copyright 2013 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 "ios/chrome/browser/sync/sync_setup_service_mock.h"
+
+SyncSetupServiceMock::SyncSetupServiceMock(
+    sync_driver::SyncService* sync_service,
+    PrefService* prefs)
+    : SyncSetupService(sync_service, prefs) {
+}
+
+SyncSetupServiceMock::~SyncSetupServiceMock() {
+}