gfe-relnote: Let QUIC client drops initial key when a handshake packet has been sent. protected by existing gfe2_reloadable_flag_quic_enable_version_draft_25_v3 and gfe2_reloadable_flag_quic_enable_version_draft_27.

PiperOrigin-RevId: 308882771
Change-Id: Icbae03467ebc7845dacb8d6398cd2657dcf11632
diff --git a/quic/core/quic_session.cc b/quic/core/quic_session.cc
index 3524242..930fc2f 100644
--- a/quic/core/quic_session.cc
+++ b/quic/core/quic_session.cc
@@ -289,6 +289,10 @@
   GetMutableCryptoStream()->OnOneRttPacketAcknowledged();
 }
 
+void QuicSession::OnHandshakePacketSent() {
+  GetMutableCryptoStream()->OnHandshakePacketSent();
+}
+
 void QuicSession::PendingStreamOnRstStream(const QuicRstStreamFrame& frame) {
   DCHECK(VersionUsesHttp3(transport_version()));
   QuicStreamId stream_id = frame.stream_id;