Remove lastest_revived_packet from QuicAckFrame since FEC is gone. No functional change expected.

net/quic/quic_connection_logger.cc

Index: net/quic/quic_connection_logger.cc
diff --git a/net/quic/quic_connection_logger.cc b/net/quic/quic_connection_logger.cc
index bfc4c2f73e764b9b9384d2ace1e54daa1b737eed..52b54c3b1596b7b81df13992e4a3ef885120a546 100644
--- a/net/quic/quic_connection_logger.cc
+++ b/net/quic/quic_connection_logger.cc
@@ -123,9 +123,6 @@ scoped_ptr<base::Value> NetLogQuicAckFrameCallback(
   for (QuicPacketNumber packet : frame->missing_packets)
     missing->AppendString(base::Uint64ToString(packet));
 
-  dict->SetString("latest_revived_packet",
-                  base::Int64ToString(frame->latest_revived_packet));
-
   base::ListValue* received = new base::ListValue();
   dict->Set("received_packet_times", received);
   const PacketTimeVector& received_times = frame->received_packet_times;