gfe-relnote: n/a (logging only change)

Downgrade a WARNING log to DLOG.

PiperOrigin-RevId: 273303930
Change-Id: Ib6aa96977d0bbba0d3424e76b79055b73d0a4b37

quic/core/quic_connection.cc

diff --git a/quic/core/quic_connection.cc b/quic/core/quic_connection.cc
index 220a17a..d4376cd 100644
--- a/quic/core/quic_connection.cc
+++ b/quic/core/quic_connection.cc
@@ -2710,9 +2710,9 @@
       // acked. Two packets are marked RTO_RETRANSMITTED, but the first packet
       // is retransmitted as two packets because of packet number length
       // increases (please see QuicConnectionTest.RtoPacketAsTwo).
-      QUIC_LOG_IF(WARNING,
-                  retransmission_mode == QuicSentPacketManager::TLP_MODE &&
-                      stats_.rto_count == 0)
+      QUIC_DLOG_IF(WARNING,
+                   retransmission_mode == QuicSentPacketManager::TLP_MODE &&
+                       stats_.rto_count == 0)
           << "No packet gets sent when timer fires in TLP mode, sending PING";
       DCHECK_LT(0u, sent_packet_manager_.pending_timer_transmission_count());
       visitor_->SendPing();