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

sync/syncable/directory_change_delegate.h

-// Copyright 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_SYNCABLE_DIRECTORY_CHANGE_DELEGATE_H_
-#define SYNC_SYNCABLE_DIRECTORY_CHANGE_DELEGATE_H_
-
-#include <stdint.h>
-
-#include <vector>
-
-#include "sync/base/sync_export.h"
-#include "sync/internal_api/public/base/model_type.h"
-#include "sync/syncable/write_transaction_info.h"
-
-namespace syncer {
-namespace syncable {
-
-// This is an interface for listening to directory change events, triggered by
-// the releasing of the syncable transaction. The delegate performs work to
-// 1. Calculate changes, depending on the source of the transaction
-//    (HandleCalculateChangesChangeEventFromSyncer/Syncapi).
-// 2. Perform final work while the transaction is held
-//    (HandleTransactionEndingChangeEvent).
-// 3. Perform any work that should be done after the transaction is released.
-//    (HandleTransactionCompleteChangeEvent).
-//
-// Note that these methods may be called on *any* thread.
-class SYNC_EXPORT DirectoryChangeDelegate {
- public:
-  // Returns the handles of changed entries in |entry_changed|.
-  virtual void HandleCalculateChangesChangeEventFromSyncApi(
-      const ImmutableWriteTransactionInfo& write_transaction_info,
-      BaseTransaction* trans,
-      std::vector<int64_t>* entries_changed) = 0;
-  // Returns the handles of changed entries in |entry_changed|.
-  virtual void HandleCalculateChangesChangeEventFromSyncer(
-      const ImmutableWriteTransactionInfo& write_transaction_info,
-      BaseTransaction* trans,
-      std::vector<int64_t>* entries_changed) = 0;
-  // Must return the set of all ModelTypes that were modified in the
-  // transaction.
-  virtual ModelTypeSet HandleTransactionEndingChangeEvent(
-      const ImmutableWriteTransactionInfo& write_transaction_info,
-      BaseTransaction* trans) = 0;
-  virtual void HandleTransactionCompleteChangeEvent(
-      ModelTypeSet models_with_changes) = 0;
- protected:
-  virtual ~DirectoryChangeDelegate() {}
-};
-
-}  // namespace syncable
-}  // namespace syncer
-
-#endif  // SYNC_SYNCABLE_DIRECTORY_CHANGE_DELEGATE_H_