Change a LOG(WARNING) to a DLOG(WARNING). No functional change.

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 43a6ff30bea8e17721054747e7d62b1933ff5844..134e286b982181bf62c0b64def340d0b8b84a309 100644
--- a/net/quic/quic_connection.cc
+++ b/net/quic/quic_connection.cc
@@ -874,9 +874,9 @@ const char* QuicConnection::ValidateAckFrame(const QuicAckFrame& incoming_ack) {
     if (!sent_entropy_manager_.IsValidEntropy(incoming_ack.largest_observed,
                                               incoming_ack.packets,
                                               incoming_ack.entropy_hash)) {
-      LOG(WARNING) << ENDPOINT << "Peer sent invalid entropy."
-                   << " largest_observed:" << incoming_ack.largest_observed
-                   << " last_received:" << last_header_.packet_number;
+      DLOG(WARNING) << ENDPOINT << "Peer sent invalid entropy."
+                    << " largest_observed:" << incoming_ack.largest_observed
+                    << " last_received:" << last_header_.packet_number;
       return "Invalid entropy.";
     }
   } else {