Landing Recent QUIC Changes.

net/quic/quic_unacked_packet_map.cc

 // Copyright 2014 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_unacked_packet_map.h"
 
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "net/quic/quic_connection_stats.h"
 #include "net/quic/quic_utils_chromium.h"
@@ skipping 277 matching lines @@
            unacked_packets_.rbegin(); it != unacked_packets_.rend(); ++it) {
     if (it->in_flight && it->retransmittable_frames) {
       return true;
     }
   }
   return false;
 }
 
 QuicPacketSequenceNumber
 QuicUnackedPacketMap::GetLeastUnacked() const {
-  if (unacked_packets_.empty()) {
-    // If there are no unacked packets, return 0.
-    return 0;
-  }
   return least_unacked_;
 }
 
 void QuicUnackedPacketMap::SetSent(QuicPacketSequenceNumber sequence_number,
                                    QuicTime sent_time,
                                    QuicByteCount bytes_sent,
                                    bool set_in_flight) {
   DCHECK_GE(sequence_number, least_unacked_);
   DCHECK_LT(sequence_number, least_unacked_ + unacked_packets_.size());
   TransmissionInfo* info = &unacked_packets_[sequence_number - least_unacked_];
@@ skipping 16 matching lines @@
   TransmissionInfo* info = &unacked_packets_[sequence_number - least_unacked_];
   DCHECK(!info->in_flight);
   DCHECK_NE(0u, info->bytes_sent);
   DCHECK(info->sent_time.IsInitialized());
 
   bytes_in_flight_ += info->bytes_sent;
   info->in_flight = true;
 }
 
 }  // namespace net