[Sync] Persist keystore key across restarts

chrome/browser/sync/test_profile_sync_service.cc

 // Copyright (c) 2012 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 "chrome/browser/sync/test_profile_sync_service.h"
 
 #include "chrome/browser/signin/signin_manager.h"
 #include "chrome/browser/sync/abstract_profile_sync_service_test.h"
 #include "chrome/browser/sync/glue/data_type_controller.h"
 #include "chrome/browser/sync/glue/sync_backend_host.h"
@@ skipping 64 matching lines @@
 void SyncBackendHostForProfileSyncTest::RequestConfigureSyncer(
     sync_api::ConfigureReason reason,
     syncable::ModelTypeSet types_to_config,
     const browser_sync::ModelSafeRoutingInfo& routing_info,
     const base::Callback<void(syncable::ModelTypeSet)>& ready_task,
     const base::Closure& retry_callback) {
   syncable::ModelTypeSet sync_ended;
   if (!fail_initial_download_)
     sync_ended.PutAll(types_to_config);
 
-  FinishConfigureDataTypesOnFrontendLoop(types_to_config,
+  FinishConfigureDataTypesOnFrontendLoop("keystore_token",
+                                         types_to_config,
                                          sync_ended,
                                          ready_task);
 }
 
 void SyncBackendHostForProfileSyncTest::SetHistoryServiceExpectations(
     ProfileMock* profile) {
   EXPECT_CALL(*profile, GetHistoryService(testing::_)).
       WillOnce(testing::Return((HistoryService*)NULL));
 }
 
@@ skipping 115 matching lines @@
 void TestProfileSyncService::CreateBackend() {
   backend_.reset(new browser_sync::SyncBackendHostForProfileSyncTest(
       profile(),
       sync_prefs_.AsWeakPtr(),
       invalidator_storage_.AsWeakPtr(),
       set_initial_sync_ended_on_init_,
       synchronous_backend_initialization_,
       fail_initial_download_,
       use_real_database_));
 }