Remove unnecessary methods from QuicUnackedPacketMap and a minor

net/quic/test_tools/quic_sent_packet_manager_peer.h

 // 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.
 
 #ifndef NET_QUIC_TEST_TOOLS_QUIC_SENT_PACKET_MANAGER_PEER_H_
 #define NET_QUIC_TEST_TOOLS_QUIC_SENT_PACKET_MANAGER_PEER_H_
 
 #include "net/quic/quic_protocol.h"
 #include "net/quic/quic_sent_packet_manager.h"
 
@@ skipping 42 matching lines @@
 
   static QuicTime::Delta GetRetransmissionDelay(
       const QuicSentPacketManager* sent_packet_manager);
 
   static bool HasUnackedCryptoPackets(
       const QuicSentPacketManager* sent_packet_manager);
 
   static size_t GetNumRetransmittablePackets(
       const QuicSentPacketManager* sent_packet_manager);
 
-  static SequenceNumberSet GetUnackedPackets(
-      const QuicSentPacketManager* sent_packet_manager);
-
   static QuicByteCount GetBytesInFlight(
       const QuicSentPacketManager* sent_packet_manager);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(QuicSentPacketManagerPeer);
 };
 
 }  // namespace test
 
 }  // namespace net
 
 #endif  // NET_QUIC_TEST_TOOLS_QUIC_SENT_PACKET_MANAGER_PEER_H_