QUIC test refactor to move tests from the QuicSentPacketManagerTest to

net/quic/congestion_control/tcp_loss_algorithm.h

 // Copyright (c) 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.
 
 #ifndef NET_QUIC_CONGESTION_CONTROL_TCP_LOSS_ALGORITHM_H_
 #define NET_QUIC_CONGESTION_CONTROL_TCP_LOSS_ALGORITHM_H_
 
 #include <algorithm>
 #include <map>
 
 #include "base/basictypes.h"
 #include "net/quic/congestion_control/loss_detection_interface.h"
 #include "net/quic/quic_protocol.h"
 #include "net/quic/quic_time.h"
 #include "net/quic/quic_unacked_packet_map.h"
 
 namespace net {
 
-// Class which implement's TCP's approach of losing packets when 3 nacks have
+// Class which implement's TCP's approach of detecting loss when 3 nacks have
 // been received for a packet.  Also implements TCP's early retransmit(RFC5827).
 class NET_EXPORT_PRIVATE TCPLossAlgorithm : public LossDetectionInterface {
  public:
   TCPLossAlgorithm();
   virtual ~TCPLossAlgorithm() {}
 
   // Uses nack counts to decide when packets are lost.
   virtual SequenceNumberSet DetectLostPackets(
       const QuicUnackedPacketMap& unacked_packets,
       const QuicTime& time,
       QuicPacketSequenceNumber largest_observed,
       QuicTime::Delta srtt) OVERRIDE;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CONGESTION_CONTROL_TCP_LOSS_ALGORITHM_H_