[Sync] Rename DataTypeState to ModelTypeState.

components/sync/api/metadata_batch.h

Index: components/sync/api/metadata_batch.h
diff --git a/components/sync/api/metadata_batch.h b/components/sync/api/metadata_batch.h
index 846befe6ec97076bc1ec2465090dbb5fdcf8ff3d..01393a32b283453cf5bc721bfbc0dcb5cd0575a1 100644
--- a/components/sync/api/metadata_batch.h
+++ b/components/sync/api/metadata_batch.h
@@ -8,8 +8,8 @@
 #include <map>
 #include <string>
 
-#include "components/sync/protocol/data_type_state.pb.h"
 #include "components/sync/protocol/entity_metadata.pb.h"
+#include "components/sync/protocol/model_type_state.pb.h"
 
 namespace syncer {
 
@@ -31,15 +31,15 @@ class MetadataBatch {
   void AddMetadata(const std::string& storage_key,
                    const sync_pb::EntityMetadata& metadata);
 
-  // Get the DataTypeState for this batch.
-  const sync_pb::DataTypeState& GetDataTypeState() const;
+  // Get the ModelTypeState for this batch.
+  const sync_pb::ModelTypeState& GetModelTypeState() const;
 
-  // Set the DataTypeState for this batch.
-  void SetDataTypeState(const sync_pb::DataTypeState& state);
+  // Set the ModelTypeState for this batch.
+  void SetModelTypeState(const sync_pb::ModelTypeState& state);
 
  private:
   EntityMetadataMap metadata_map_;
-  sync_pb::DataTypeState state_;
+  sync_pb::ModelTypeState state_;
 };
 
 }  // namespace syncer