gfe-relnote: In QUIC, enable round robin scheduling. Protected by gfe2_reloadable_flag_quic_enable_rr_write_schduler.

PiperOrigin-RevId: 269414968
Change-Id: Id2e97b3eea61cbd0f8c140f970715f21af90c156
diff --git a/quic/core/quic_session.h b/quic/core/quic_session.h
index 5250f9b..6fb4c8d 100644
--- a/quic/core/quic_session.h
+++ b/quic/core/quic_session.h
@@ -756,6 +756,9 @@
 
   // The number of expected static streams.
   QuicStreamCount num_expected_unidirectional_static_streams_;
+
+  // If true, enables round robin scheduling.
+  bool enable_round_robin_scheduling_;
 };
 
 }  // namespace quic