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

components/sync/model/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_
+#ifndef COMPONENTS_SYNC_MODEL_METADATA_CHANGE_LIST_H_
+#define COMPONENTS_SYNC_MODEL_METADATA_CHANGE_LIST_H_
 
 #include <string>
 
 namespace sync_pb {
 class EntityMetadata;
 class ModelTypeState;
 }  // namespace sync_pb
 
 namespace syncer {
 
@@ skipping 23 matching lines @@
   // 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_
+#endif  // COMPONENTS_SYNC_MODEL_METADATA_CHANGE_LIST_H_