Pref service: have Mash and Chrome connect to the right pref stores

services/preferences/pref_service_factory_unittest.cc

 // Copyright (c) 2017 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 "services/preferences/public/cpp/pref_service_factory.h"
 
 #include "base/files/scoped_temp_dir.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/test/sequenced_worker_pool_owner.h"
@@ skipping 107 matching lines @@
   // base::MessageLoop::DestructionObserver
   void WillDestroyCurrentMessageLoop() override { worker_pool_owner_.reset(); }
 
   // Create a fully initialized PrefService synchronously.
   std::unique_ptr<PrefService> Create() {
     std::unique_ptr<PrefService> pref_service;
     base::RunLoop run_loop;
     auto pref_registry = make_scoped_refptr(new PrefRegistrySimple());
     pref_registry->RegisterIntegerPref(kKey, kInitialValue);
     pref_registry->RegisterIntegerPref(kOtherKey, kInitialValue);
-    ConnectToPrefService(connector(), pref_registry,
+    ConnectToPrefService(connector(), pref_registry, {},
                          base::Bind(&PrefServiceFactoryTest::OnCreate,
                                     run_loop.QuitClosure(), &pref_service));
     run_loop.Run();
     return pref_service;
   }
 
   // Wait until first update of the pref |key| in |pref_service| synchronously.
   void WaitForPrefChange(PrefService* pref_service, const std::string& key) {
     PrefChangeRegistrar registrar;
     registrar.Init(pref_service);
@@ skipping 114 matching lines @@
                                           base::MakeUnique<base::Value>(2), 0);
   WaitForPrefChange(pref_service.get(), kKey);
   EXPECT_EQ(2, pref_service->GetInteger(kKey));
 
   pref_service->SetInteger(kKey, 3);
   EXPECT_EQ(2, pref_service->GetInteger(kKey));
 }
 
 }  // namespace
 }  // namespace prefs