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

components/sync/driver/fake_generic_change_processor.h

 // Copyright 2014 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_GENERIC_CHANGE_PROCESSOR_H_
 #define COMPONENTS_SYNC_DRIVER_FAKE_GENERIC_CHANGE_PROCESSOR_H_
 
+#include <memory>
 #include <string>
 
 #include "base/macros.h"
 #include "components/sync/api/sync_error.h"
 #include "components/sync/base/model_type.h"
 #include "components/sync/driver/generic_change_processor.h"
 #include "components/sync/driver/generic_change_processor_factory.h"
 #include "components/sync/driver/sync_api_component_factory.h"
 
 namespace sync_driver {
@@ skipping 26 matching lines @@
 
 // Define a factory for FakeGenericChangeProcessor for convenience.
 class FakeGenericChangeProcessorFactory : public GenericChangeProcessorFactory {
  public:
   explicit FakeGenericChangeProcessorFactory(
       std::unique_ptr<FakeGenericChangeProcessor> processor);
   ~FakeGenericChangeProcessorFactory() override;
   std::unique_ptr<GenericChangeProcessor> CreateGenericChangeProcessor(
       syncer::ModelType type,
       syncer::UserShare* user_share,
-      syncer::DataTypeErrorHandler* error_handler,
+      std::unique_ptr<syncer::DataTypeErrorHandler> error_handler,
       const base::WeakPtr<syncer::SyncableService>& local_service,
       const base::WeakPtr<syncer::SyncMergeResult>& merge_result,
       SyncClient* sync_client) override;
 
  private:
   std::unique_ptr<FakeGenericChangeProcessor> processor_;
   DISALLOW_COPY_AND_ASSIGN(FakeGenericChangeProcessorFactory);
 };
 
 }  // namespace sync_driver
 
 #endif  // COMPONENTS_SYNC_DRIVER_FAKE_GENERIC_CHANGE_PROCESSOR_H_