[Sync] Move 'sync' target to sync/

chrome/browser/sync/syncable/syncable-inl.h

-// Copyright (c) 2010 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 CHROME_BROWSER_SYNC_SYNCABLE_SYNCABLE_INL_H_
-#define CHROME_BROWSER_SYNC_SYNCABLE_SYNCABLE_INL_H_
-#pragma once
-
-namespace syncable {
-
-template <typename FieldType, FieldType field_index>
-class LessField {
- public:
-  inline bool operator() (const syncable::EntryKernel* a,
-                          const syncable::EntryKernel* b) const {
-    return a->ref(field_index) < b->ref(field_index);
-  }
-};
-
-}  // namespace syncable
-
-#endif  // CHROME_BROWSER_SYNC_SYNCABLE_SYNCABLE_INL_H_