Let SyncBackupManager keep backup data in memory until shutdown. Only persist

sync/internal_api/public/test/test_internal_components_factory.h

 // 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.
 
 #ifndef SYNC_INTERNAL_API_PUBLIC_TEST_TEST_INTERNAL_COMPONENTS_FACTORY_H_
 #define SYNC_INTERNAL_API_PUBLIC_TEST_TEST_INTERNAL_COMPONENTS_FACTORY_H_
 
 #include "sync/internal_api/public/internal_components_factory.h"
 
 namespace syncer {
 
-enum StorageOption {
-  // BuildDirectoryBackingStore should not use persistent on-disk storage.
-  STORAGE_IN_MEMORY,
-  // Use this if you want BuildDirectoryBackingStore to create a real
-  // on disk store.
-  STORAGE_ON_DISK,
-  // Use this to test the case where a directory fails to load.
-  STORAGE_INVALID
-};
-
 class TestInternalComponentsFactory : public InternalComponentsFactory {
  public:
   explicit TestInternalComponentsFactory(const Switches& switches,
-                                         StorageOption option);
+                                         StorageOption option,
+                                         StorageOption* storage_used);
   virtual ~TestInternalComponentsFactory();
 
   virtual scoped_ptr<SyncScheduler> BuildScheduler(
       const std::string& name,
       sessions::SyncSessionContext* context,
       syncer::CancelationSignal* cancelation_signal) OVERRIDE;
 
   virtual scoped_ptr<sessions::SyncSessionContext> BuildContext(
       ServerConnectionManager* connection_manager,
       syncable::Directory* directory,
       ExtensionsActivity* monitor,
       const std::vector<SyncEngineEventListener*>& listeners,
       sessions::DebugInfoGetter* debug_info_getter,
       ModelTypeRegistry* model_type_registry,
       const std::string& invalidator_client_id) OVERRIDE;
 
   virtual scoped_ptr<syncable::DirectoryBackingStore>
   BuildDirectoryBackingStore(
+      StorageOption storage,
       const std::string& dir_name,
       const base::FilePath& backing_filepath) OVERRIDE;
 
   virtual Switches GetSwitches() const OVERRIDE;
 
  private:
   const Switches switches_;
-  const StorageOption storage_option_;
+  const StorageOption storage_override_;
+  StorageOption* storage_used_;
 
   DISALLOW_COPY_AND_ASSIGN(TestInternalComponentsFactory);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_PUBLIC_TEST_TEST_INTERNAL_COMPONENTS_FACTORY_H_