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

sync/test/null_directory_change_delegate.h

-// Copyright (c) 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_TEST_NULL_DIRECTORY_CHANGE_DELEGATE_H_
-#define SYNC_TEST_NULL_DIRECTORY_CHANGE_DELEGATE_H_
-
-#include <stdint.h>
-
-#include <vector>
-
-#include "base/compiler_specific.h"
-#include "sync/syncable/directory_change_delegate.h"
-
-namespace syncer {
-namespace syncable {
-
-// DirectoryChangeDelegate that does nothing in all delegate methods.
-class NullDirectoryChangeDelegate : public DirectoryChangeDelegate {
- public:
-  ~NullDirectoryChangeDelegate() override;
-
-  void HandleCalculateChangesChangeEventFromSyncApi(
-      const ImmutableWriteTransactionInfo& write_transaction_info,
-      BaseTransaction* trans,
-      std::vector<int64_t>* entries_changed) override;
-  void HandleCalculateChangesChangeEventFromSyncer(
-      const ImmutableWriteTransactionInfo& write_transaction_info,
-      BaseTransaction* trans,
-      std::vector<int64_t>* entries_changed) override;
-  ModelTypeSet HandleTransactionEndingChangeEvent(
-      const ImmutableWriteTransactionInfo& write_transaction_info,
-      BaseTransaction* trans) override;
-  void HandleTransactionCompleteChangeEvent(
-      ModelTypeSet models_with_changes) override;
-};
-
-}  // namespace syncable
-}  // namespace syncer
-
-#endif  // SYNC_TEST_NULL_DIRECTORY_CHANGE_DELEGATE_H_