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

sync/api/entity_change.h

-// Copyright 2015 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_API_ENTITY_CHANGE_H_
-#define SYNC_API_ENTITY_CHANGE_H_
-
-#include <string>
-#include <vector>
-
-#include "sync/api/entity_data.h"
-#include "sync/base/sync_export.h"
-
-namespace syncer_v2 {
-
-class SYNC_EXPORT EntityChange {
- public:
-  enum ChangeType {
-    ACTION_ADD,
-    ACTION_UPDATE,
-    ACTION_DELETE
-  };
-
-  static EntityChange CreateAdd(std::string client_tag, EntityDataPtr data);
-  static EntityChange CreateUpdate(std::string client_tag, EntityDataPtr data);
-  static EntityChange CreateDelete(std::string client_tag);
-
-  EntityChange(const EntityChange& other);
-  virtual ~EntityChange();
-
-  std::string client_tag() const { return client_tag_; }
-  ChangeType type() const { return type_; }
-  const EntityData& data() const { return data_.value(); }
-
- private:
-  EntityChange(std::string client_tag, ChangeType type, EntityDataPtr data);
-
-  std::string client_tag_;
-  ChangeType type_;
-  EntityDataPtr data_;
-};
-
-typedef std::vector<EntityChange> EntityChangeList;
-
-}  // namespace syncer_v2
-
-#endif  // SYNC_API_ENTITY_CHANGE_H_