-void drawing_data_request_begin(EventsRequest *events_request,
- LttvTracesetState *tss);
-void drawing_chunk_begin(EventsRequest *events_request, LttvTracesetState *tss);
+void drawing_data_request_begin(EventsRequest *events_request);
+void drawing_chunk_begin(EventsRequest *events_request, LttvTraceset *ts);