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

components/sync/model/metadata_batch.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_BATCH_H_
-#define COMPONENTS_SYNC_API_METADATA_BATCH_H_
+#ifndef COMPONENTS_SYNC_MODEL_METADATA_BATCH_H_
+#define COMPONENTS_SYNC_MODEL_METADATA_BATCH_H_
 
 #include <map>
 #include <string>
 
 #include "components/sync/protocol/entity_metadata.pb.h"
 #include "components/sync/protocol/model_type_state.pb.h"
 
 namespace syncer {
 
 // Map of storage keys to EntityMetadata proto.
@@ skipping 20 matching lines @@
   // Set the ModelTypeState for this batch.
   void SetModelTypeState(const sync_pb::ModelTypeState& state);
 
  private:
   EntityMetadataMap metadata_map_;
   sync_pb::ModelTypeState state_;
 };
 
 }  // namespace syncer
 
-#endif  // COMPONENTS_SYNC_API_METADATA_BATCH_H_
+#endif  // COMPONENTS_SYNC_MODEL_METADATA_BATCH_H_