relnote: Deprecate FLAGS_quic_retransmit_via_onserializedpacket.

net/quic/quic_packet_generator.h

Index: net/quic/quic_packet_generator.h
diff --git a/net/quic/quic_packet_generator.h b/net/quic/quic_packet_generator.h
index 63b0c0c38e5b994f15bceb4e9640b2fe91317491..6d956e36b15b51ff13cead782656caa7cdf5ae06 100644
--- a/net/quic/quic_packet_generator.h
+++ b/net/quic/quic_packet_generator.h
@@ -148,10 +148,9 @@ class NET_EXPORT_PRIVATE QuicPacketGenerator {
   // Used for retransmitting packets to ensure they aren't too long.
   // Caller must ensure that any open FEC group is closed before calling this
   // method.
-  SerializedPacket ReserializeAllFrames(
-      const PendingRetransmission& retransmission,
-      char* buffer,
-      size_t buffer_len);
+  void ReserializeAllFrames(const PendingRetransmission& retransmission,
+                            char* buffer,
+                            size_t buffer_len);
 
   // Update the packet number length to use in future packets as soon as it
   // can be safely changed.