[Sync] Move //sync to //components/sync.

sync/api/model_type_change_processor.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 SYNC_API_MODEL_TYPE_CHANGE_PROCESSOR_H_
-#define SYNC_API_MODEL_TYPE_CHANGE_PROCESSOR_H_
-
-#include <memory>
-#include <string>
-
-#include "sync/api/entity_data.h"
-#include "sync/api/sync_error_factory.h"
-#include "sync/base/sync_export.h"
-#include "sync/internal_api/public/activation_context.h"
-
-namespace syncer {
-class DataTypeErrorHandler;
-class SyncError;
-}  // namespace syncer
-
-namespace syncer_v2 {
-
-class MetadataBatch;
-class MetadataChangeList;
-
-// Interface used by the ModelTypeService to inform sync of local
-// changes.
-class SYNC_EXPORT ModelTypeChangeProcessor : public syncer::SyncErrorFactory {
- public:
-  typedef base::Callback<void(syncer::SyncError,
-                              std::unique_ptr<ActivationContext>)>
-      StartCallback;
-
-  ModelTypeChangeProcessor();
-  ~ModelTypeChangeProcessor() override;
-
-  // Inform the processor of a new or updated entity. The |entity_data| param
-  // does not need to be fully set, but it should at least have specifics and
-  // non-unique name. The processor will fill in the rest if the service does
-  // not have a reason to care.
-  virtual void Put(const std::string& client_tag,
-                   std::unique_ptr<EntityData> entity_data,
-                   MetadataChangeList* metadata_change_list) = 0;
-
-  // Inform the processor of a deleted entity.
-  virtual void Delete(const std::string& client_tag,
-                      MetadataChangeList* metadata_change_list) = 0;
-
-  // Accept the initial sync metadata loaded by the service. This should be
-  // called as soon as the metadata is available to the service.
-  virtual void OnMetadataLoaded(syncer::SyncError error,
-                                std::unique_ptr<MetadataBatch> batch) = 0;
-
-  // Indicates that sync wants to connect a sync worker to this processor. Once
-  // the processor has metadata from the service, it will pass the info needed
-  // for the worker into |callback|. |error_handler| is how the processor will
-  // inform sync of any unrecoverable errors after calling |callback|, and it is
-  // guaranteed to outlive the processor. StartCallback takes a SyncError and an
-  // ActivationContext; the context should be nullptr iff the error is set.
-  virtual void OnSyncStarting(syncer::DataTypeErrorHandler* error_handler,
-                              const StartCallback& callback) = 0;
-
-  // Indicates that sync is being disabled permanently for this data type. All
-  // metadata should be erased from storage.
-  virtual void DisableSync() = 0;
-};
-
-}  // namespace syncer_v2
-
-#endif  // SYNC_API_MODEL_TYPE_CHANGE_PROCESSOR_H_