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

sync/syncable/syncable_model_neutral_write_transaction.h

-// Copyright 2013 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_SYNCABLE_MODEL_NEUTRAL_WRITE_TRANSACTION_H_
-#define SYNC_SYNCABLE_SYNCABLE_MODEL_NEUTRAL_WRITE_TRANSACTION_H_
-
-#include "base/macros.h"
-#include "sync/base/sync_export.h"
-#include "sync/syncable/metahandle_set.h"
-#include "sync/syncable/syncable_base_write_transaction.h"
-
-namespace syncer {
-namespace syncable {
-
-// A transaction used to instantiate Entries or ModelNeutralMutableEntries.
-//
-// This allows it to be used when making changes to sync entity properties that
-// do not need to be kept in sync with the associated native model.
-//
-// This class differs internally from WriteTransactions in that it does a less
-// good job of tracking and reporting on changes to the entries modified within
-// its scope.  This is because its changes do not need to be reported to the
-// DirectoryChangeDelegate.
-class SYNC_EXPORT ModelNeutralWriteTransaction : public BaseWriteTransaction {
- public:
-  ModelNeutralWriteTransaction(
-      const tracked_objects::Location& location,
-      WriterTag writer,
-      Directory* directory);
-  ~ModelNeutralWriteTransaction() override;
-
-  void TrackChangesTo(const EntryKernel* entry) override;
-
- private:
-  MetahandleSet modified_handles_;
-
-  DISALLOW_COPY_AND_ASSIGN(ModelNeutralWriteTransaction);
-};
-
-}  // namespace syncable
-}  // namespace syncer
-
-#endif  // SYNC_SYNCABLE_SYNCABLE_MODEL_NEUTRAL_WRITE_TRANSACTION_H_