[Sync] Convert DTCs to be not RefCounted and NonThreadSafe.

components/sync/driver/fake_sync_service.h

 // Copyright 2015 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 COMPONENTS_SYNC_DRIVER_FAKE_SYNC_SERVICE_H_
 #define COMPONENTS_SYNC_DRIVER_FAKE_SYNC_SERVICE_H_
 
+#include <memory>
 #include <string>
 
 #include "components/sync/driver/sync_service.h"
 #include "components/sync/engine/cycle/sync_cycle_snapshot.h"
 #include "google_apis/gaia/google_service_auth_error.h"
 
 namespace syncer {
 class BaseTransaction;
 struct UserShare;
 }
@@ skipping 41 matching lines @@
   void EnableEncryptEverything() override;
   bool IsEncryptEverythingEnabled() const override;
   void SetEncryptionPassphrase(const std::string& passphrase,
                                PassphraseType type) override;
   bool SetDecryptionPassphrase(const std::string& passphrase) override;
   bool IsCryptographerReady(
       const syncer::BaseTransaction* trans) const override;
   syncer::UserShare* GetUserShare() const override;
   LocalDeviceInfoProvider* GetLocalDeviceInfoProvider() const override;
   void RegisterDataTypeController(
-      sync_driver::DataTypeController* data_type_controller) override;
+      std::unique_ptr<sync_driver::DataTypeController> data_type_controller)
+      override;
   void ReenableDatatype(syncer::ModelType type) override;
   SyncTokenStatus GetSyncTokenStatus() const override;
   std::string QuerySyncStatusSummaryString() override;
   bool QueryDetailedSyncStatus(syncer::SyncStatus* result) override;
   base::string16 GetLastSyncedTimeString() const override;
   std::string GetBackendInitializationStateString() const override;
   syncer::SyncCycleSnapshot GetLastCycleSnapshot() const override;
   base::Value* GetTypeStatusMap() const override;
   const GURL& sync_service_url() const override;
   std::string unrecoverable_error_message() const override;
@@ skipping 16 matching lines @@
 
   GoogleServiceAuthError error_;
   GURL sync_service_url_;
   std::string unrecoverable_error_message_;
   std::unique_ptr<syncer::UserShare> user_share_;
 };
 
 }  // namespace sync_driver
 
 #endif  // COMPONENTS_SYNC_DRIVER_FAKE_SYNC_SERVICE_H_