gfe-relnote: In QUIC with TLS, do not proceed in SetWriteSecret if connection has been closed. Protected by gfe2_reloadable_flag_quic_notify_handshaker_on_connection_close.

PiperOrigin-RevId: 309753183
Change-Id: I829b92d82ca84f85ab60aa09940a3b205641a34b
diff --git a/quic/core/quic_crypto_server_stream.h b/quic/core/quic_crypto_server_stream.h
index 8eef07c..52d4874 100644
--- a/quic/core/quic_crypto_server_stream.h
+++ b/quic/core/quic_crypto_server_stream.h
@@ -43,6 +43,8 @@
   void OnPacketDecrypted(EncryptionLevel level) override;
   void OnOneRttPacketAcknowledged() override {}
   void OnHandshakePacketSent() override {}
+  void OnConnectionClosed(QuicErrorCode /*error*/,
+                          ConnectionCloseSource /*source*/) override {}
   void OnHandshakeDoneReceived() override;
   bool ShouldSendExpectCTHeader() const override;