Change the QUIC TLP to send new data instead of retransmitting old data

net/quic/quic_sent_packet_manager.h

Index: net/quic/quic_sent_packet_manager.h
diff --git a/net/quic/quic_sent_packet_manager.h b/net/quic/quic_sent_packet_manager.h
index 395d2121a26b7b12a28855f541ad03ea6f2de196..2e75786119ac768c55be865214e01f7bff17149a 100644
--- a/net/quic/quic_sent_packet_manager.h
+++ b/net/quic/quic_sent_packet_manager.h
@@ -101,6 +101,10 @@ class NET_EXPORT_PRIVATE QuicSentPacketManager {
   // Requests retransmission of all unacked packets of |retransmission_type|.
   void RetransmitUnackedPackets(RetransmissionType retransmission_type);
 
+  // Retransmits the oldest pending packet there is still a tail loss probe
+  // pending.  Invoked after OnRetransmissionTimeout.
+  bool MaybeRetransmitTailLossProbe();
+
   // Removes the retransmittable frames from all unencrypted packets to ensure
   // they don't get retransmitted.
   void NeuterUnencryptedPackets();
@@ -206,9 +210,6 @@ class NET_EXPORT_PRIVATE QuicSentPacketManager {
   // Retransmits all crypto stream packets.
   void RetransmitCryptoPackets();
 
-  // Retransmits the oldest pending packet.
-  void RetransmitOldestPacket();
-
   // Retransmits all the packets and abandons by invoking a full RTO.
   void RetransmitAllPackets();