Change window_update frame's byte_offset to max_data to incorporate IETF spec.

https://tools.ietf.org/html/draft-ietf-quic-transport-24#section-19.10

gfe-relnote: name change only. Not protected.
PiperOrigin-RevId: 281838511
Change-Id: I716cfd6856d8c9dd9981040f68bc0567feaedaee
diff --git a/quic/core/quic_trace_visitor.cc b/quic/core/quic_trace_visitor.cc
index 99681af..5097485 100644
--- a/quic/core/quic_trace_visitor.cc
+++ b/quic/core/quic_trace_visitor.cc
@@ -171,7 +171,7 @@
 
       quic_trace::FlowControlInfo* info =
           frame_record->mutable_flow_control_info();
-      info->set_max_data(frame.window_update_frame->byte_offset);
+      info->set_max_data(frame.window_update_frame->max_data);
       if (!is_connection) {
         info->set_stream_id(frame.window_update_frame->stream_id);
       }