[Sync] Rename DataTypeState to ModelTypeState.

components/sync/api/metadata_batch.cc

Index: components/sync/api/metadata_batch.cc
diff --git a/components/sync/api/metadata_batch.cc b/components/sync/api/metadata_batch.cc
index 64c3c76a994c8ec0d0504e240f38738b5d974d1b..f2b8f451d6f8f4e29c5f9d46ec8167aa2ac19c50 100644
--- a/components/sync/api/metadata_batch.cc
+++ b/components/sync/api/metadata_batch.cc
@@ -20,11 +20,11 @@ void MetadataBatch::AddMetadata(const std::string& storage_key,
   metadata_map_.insert(std::make_pair(storage_key, metadata));
 }
 
-const sync_pb::DataTypeState& MetadataBatch::GetDataTypeState() const {
+const sync_pb::ModelTypeState& MetadataBatch::GetModelTypeState() const {
   return state_;
 }
 
-void MetadataBatch::SetDataTypeState(const sync_pb::DataTypeState& state) {
+void MetadataBatch::SetModelTypeState(const sync_pb::ModelTypeState& state) {
   state_ = state;
 }