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

sync/syncable/scoped_parent_child_index_updater.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_SYNCABLE_SCOPED_PARENT_CHILD_INDEX_UPDATER_H_
-#define SYNC_SYNCABLE_SCOPED_PARENT_CHILD_INDEX_UPDATER_H_
-
-#include "base/macros.h"
-#include "sync/base/sync_export.h"
-
-namespace syncer {
-namespace syncable {
-
-class ParentChildIndex;
-class ScopedKernelLock;
-struct EntryKernel;
-
-// Temporarily removes an item from the ParentChildIndex and re-adds it this
-// object goes out of scope.
-class ScopedParentChildIndexUpdater {
- public:
-  ScopedParentChildIndexUpdater(const ScopedKernelLock& proof_of_lock,
-                                EntryKernel* entry,
-                                ParentChildIndex* index);
-  ~ScopedParentChildIndexUpdater();
-
- private:
-  EntryKernel* entry_;
-  ParentChildIndex* index_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScopedParentChildIndexUpdater);
-};
-
-}  // namespace syncable
-}  // namespace syncer
-
-#endif  // SYNC_SYNCABLE_SCOPED_PARENT_CHILD_INDEX_UPDATER_H_