[Sync] Allow sync start without sign-in if the local sync backend is on.

components/sync/engine/test_engine_components_factory.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 "components/sync/engine/test_engine_components_factory.h"
 
 #include "components/sync/engine_impl/cycle/sync_cycle_context.h"
 #include "components/sync/syncable/in_memory_directory_backing_store.h"
 #include "components/sync/syncable/invalid_directory_backing_store.h"
 #include "components/sync/syncable/on_disk_directory_backing_store.h"
 #include "components/sync/test/engine/fake_sync_scheduler.h"
 
 namespace syncer {
 
 TestEngineComponentsFactory::TestEngineComponentsFactory(
     const Switches& switches,
     StorageOption option,
     StorageOption* storage_used)
     : switches_(switches),
       storage_override_(option),
       storage_used_(storage_used) {}
 
 TestEngineComponentsFactory::~TestEngineComponentsFactory() {}
 
 std::unique_ptr<SyncScheduler> TestEngineComponentsFactory::BuildScheduler(
     const std::string& name,
     SyncCycleContext* context,
-    CancelationSignal* cancelation_signal) {
+    CancelationSignal* cancelation_signal,
+    bool ignore_auth_credentials) {
   return std::unique_ptr<SyncScheduler>(new FakeSyncScheduler());
 }
 
 std::unique_ptr<SyncCycleContext> TestEngineComponentsFactory::BuildContext(
     ServerConnectionManager* connection_manager,
     syncable::Directory* directory,
     ExtensionsActivity* monitor,
     const std::vector<SyncEngineEventListener*>& listeners,
     DebugInfoGetter* debug_info_getter,
     ModelTypeRegistry* model_type_registry,
@@ skipping 32 matching lines @@
   NOTREACHED();
   return std::unique_ptr<syncable::DirectoryBackingStore>();
 }
 
 EngineComponentsFactory::Switches TestEngineComponentsFactory::GetSwitches()
     const {
   return switches_;
 }
 
 }  // namespace syncer