Cleanup of QUIC's TransmissionInfo constructor to make more fields const

net/quic/quic_protocol.h

Index: net/quic/quic_protocol.h
diff --git a/net/quic/quic_protocol.h b/net/quic/quic_protocol.h
index b68a9940b82f153713e29f349492d0b92cc6c61a..b1f4421cd55960b1ea4cad42a298840808114427 100644
--- a/net/quic/quic_protocol.h
+++ b/net/quic/quic_protocol.h
@@ -1017,17 +1017,17 @@ struct NET_EXPORT_PRIVATE TransmissionInfo {
   TransmissionInfo(RetransmittableFrames* retransmittable_frames,
                    QuicSequenceNumberLength sequence_number_length,
                    TransmissionType transmission_type,
-                   QuicTime sent_time);
+                   QuicTime sent_time,
+                   QuicByteCount bytes_sent,
+                   bool is_fec_packet);
 
   RetransmittableFrames* retransmittable_frames;
-  QuicSequenceNumberLength sequence_number_length;
-  // Zero when the packet is serialized, non-zero once it's sent.
-  QuicTime sent_time;
-  // Zero when the packet is serialized, non-zero once it's sent.
+  const QuicSequenceNumberLength sequence_number_length;
+  const QuicTime sent_time;
   QuicByteCount bytes_sent;
   QuicPacketCount nack_count;
   // Reason why this packet was transmitted.
-  TransmissionType transmission_type;
+  const TransmissionType transmission_type;
   // Stores the sequence numbers of all transmissions of this packet.
   // Must always be nullptr or have multiple elements.
   SequenceNumberList* all_transmissions;
@@ -1036,7 +1036,7 @@ struct NET_EXPORT_PRIVATE TransmissionInfo {
   // True if the packet can never be acked, so it can be removed.
   bool is_unackable;
   // True if the packet is an FEC packet.
-  bool is_fec_packet;
+  const bool is_fec_packet;
 };
 
 }  // namespace net