Internal QUICHE change

PiperOrigin-RevId: 340253500
Change-Id: Iacd5ea3e537e5a31b9ce723fdc3ded2db420f650
diff --git a/quic/core/quic_flags_list.h b/quic/core/quic_flags_list.h
index d753d05..ac8de8a 100644
--- a/quic/core/quic_flags_list.h
+++ b/quic/core/quic_flags_list.h
@@ -60,7 +60,7 @@
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_let_connection_handle_pings, true)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_process_undecryptable_packets_after_async_decrypt_callback, false)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_record_received_min_ack_delay, false)
-QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_reject_spdy_frames, false)
+QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_reject_spdy_frames, true)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_reject_spdy_settings, true)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_require_handshake_confirmation, false)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_send_goaway_with_connection_close, false)