[Sync] Renaming sync/api* to sync/model*.

components/sync/api/metadata_change_list.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 COMPONENTS_SYNC_API_METADATA_CHANGE_LIST_H_
-#define COMPONENTS_SYNC_API_METADATA_CHANGE_LIST_H_
-
-#include <string>
-
-namespace sync_pb {
-class EntityMetadata;
-class ModelTypeState;
-}  // namespace sync_pb
-
-namespace syncer {
-
-// Interface used by the processor and service to communicate about metadata.
-// The purpose of the interface is to record changes to data type global and
-// per entity metadata for the purpose of propagating changes to the datatype
-// specific storage implementation.
-// The implementation of the interface is supposed to keep the record of all
-// updated / deleted metadata records and provide a mechanism to enumerate
-// them. If there are multiple UpdateMetadata / ClearMetadata calls made for the
-// same metadata record the last one is supposed to win.
-class MetadataChangeList {
- public:
-  MetadataChangeList() {}
-  virtual ~MetadataChangeList() {}
-
-  // Requests ModelTypeState to be updated in the storage.
-  virtual void UpdateModelTypeState(
-      const sync_pb::ModelTypeState& model_type_state) = 0;
-
-  // Requests ModelTypeState to be cleared from the storage.
-  virtual void ClearModelTypeState() = 0;
-
-  // Requests metadata entry to be updated in the storage.
-  // Please note that the update might contain a deleted entry if
-  // metadata.is_deleted() is true (as opposed to clearing the entry from the
-  // storage completely by calling the Clear method).
-  virtual void UpdateMetadata(const std::string& storage_key,
-                              const sync_pb::EntityMetadata& metadata) = 0;
-
-  // Requests metadata entry to be cleared from the storage.
-  virtual void ClearMetadata(const std::string& storage_key) = 0;
-};
-
-}  // namespace syncer
-
-#endif  // COMPONENTS_SYNC_API_METADATA_CHANGE_LIST_H_