Add an IncreaseLargestObserved to QuicUnackedPacketMap to remove the rtt

net/quic/quic_connection.cc

Index: net/quic/quic_connection.cc
diff --git a/net/quic/quic_connection.cc b/net/quic/quic_connection.cc
index e5fb0f80c98e0e0b8c36628370e8dd0b30f097df..f34ea5d3f593a738d949b4c8d1e0786c5bebd20b 100644
--- a/net/quic/quic_connection.cc
+++ b/net/quic/quic_connection.cc
@@ -1466,8 +1466,8 @@ bool QuicConnection::ShouldDiscardPacket(
 
   if (retransmittable == HAS_RETRANSMITTABLE_DATA &&
       !sent_packet_manager_.HasRetransmittableFrames(sequence_number)) {
-    LOG(DFATAL) << ENDPOINT << "Dropping unacked packet: " << sequence_number
-                << " This should have been removed when it was Neutered.";
+    DVLOG(1) << ENDPOINT << "Dropping unacked packet: " << sequence_number
+             << " A previous transmission was acked while write blocked.";
     return true;
   }