sync: Support non-blocking initial sync in proto

sync/test/engine/fake_sync_scheduler.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 "sync/test/engine/fake_sync_scheduler.h"
 
 namespace syncer {
 
 FakeSyncScheduler::FakeSyncScheduler() {}
 
@@ skipping 22 matching lines @@
     syncer::ModelType type,
     scoped_ptr<InvalidationInterface> interface,
     const tracked_objects::Location& nudge_location) {
 }
 
 void FakeSyncScheduler::ScheduleConfiguration(
      const ConfigurationParams& params) {
   params.ready_task.Run();
 }
 
+void FakeSyncScheduler::ScheduleInitialSyncNudge(syncer::ModelType model_type) {
+}
+
 void FakeSyncScheduler::SetNotificationsEnabled(bool notifications_enabled) {
 }
 
 base::TimeDelta FakeSyncScheduler::GetSessionsCommitDelay() const {
   return base::TimeDelta();
 }
 
 void FakeSyncScheduler::OnCredentialsUpdated() {
 
 }
@@ skipping 34 matching lines @@
 }
 
 void FakeSyncScheduler::OnReceivedGuRetryDelay(
     const base::TimeDelta& delay) {
 }
 
 void FakeSyncScheduler::OnReceivedMigrationRequest(ModelTypeSet types) {
 }
 
 }  // namespace syncer