gfe-relnote: Update QuicConnection's SendMessage to allow specifying if the message
being sent is retransmittable.

PiperOrigin-RevId: 281363715
Change-Id: I81966b19cda8405adb6e6f5d7804c3f042fa4ba8
diff --git a/quic/core/quic_session.h b/quic/core/quic_session.h
index 03090d8..2d0f252 100644
--- a/quic/core/quic_session.h
+++ b/quic/core/quic_session.h
@@ -199,6 +199,10 @@
   // callback.
   MessageResult SendMessage(QuicMemSliceSpan message);
 
+  // Same as above SendMessage, except caller can specify if the given |message|
+  // should be flushed even if the underlying connection is deemed unwritable.
+  MessageResult SendMessage(QuicMemSliceSpan message, bool flush);
+
   // Called when message with |message_id| gets acked.
   virtual void OnMessageAcked(QuicMessageId message_id,
                               QuicTime receive_timestamp);