Use LOG_IF instead of LOG_IF_FIRST_N in a few places, as per avd's

net/quic/quic_sent_packet_manager.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/quic/quic_sent_packet_manager.h"
 
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "net/quic/congestion_control/pacing_sender.h"
 #include "net/quic/quic_ack_notifier_manager.h"
@@ skipping 298 matching lines @@
       }
     }
   }
 }
 
 void QuicSentPacketManager::MarkForRetransmission(
     QuicPacketSequenceNumber sequence_number,
     TransmissionType transmission_type) {
   TransmissionInfo* transmission_info =
       FindOrNull(unacked_packets_, sequence_number);
-  if (transmission_info == NULL) {
-    LOG(DFATAL) << "transmission_info == NULL";
+  if (transmission_info != NULL) {
+    LOG_IF(DFATAL, transmission_info->retransmittable_frames == NULL);
+    LOG_IF(DFATAL, transmission_info->sent_time == QuicTime::Zero());
   } else {
-    if (transmission_info->retransmittable_frames == NULL) {
-      LOG(DFATAL) << "transmission_info->retransmittable_frames == NULL";
-    }
-    if (transmission_info->sent_time == QuicTime::Zero()) {
-      LOG(DFATAL) << "transmission_info->sent_time == QuicTime::Zero()";
-    }
+    LOG(DFATAL) << "Unable to retansmit packet: " << sequence_number;
   }
   // TODO(ianswett): Currently the RTO can fire while there are pending NACK
   // retransmissions for the same data, which is not ideal.
   if (ContainsKey(pending_retransmissions_, sequence_number)) {
     return;
   }
 
   pending_retransmissions_[sequence_number] = transmission_type;
 }
 
@@ skipping 630 matching lines @@
   }
   previous_transmissions->erase(sequence_number);
   if (previous_transmissions->size() == 1) {
     QuicPacketSequenceNumber current = *previous_transmissions->begin();
     unacked_packets_[current].previous_transmissions = NULL;
     delete previous_transmissions;
   }
 }
 
 }  // namespace net