Change PacketKey to be unique for each frame packet by including

media/cast/net/rtp/rtp_sender.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 "media/cast/net/rtp/rtp_sender.h"
 
 #include "base/big_endian.h"
 #include "base/logging.h"
 #include "base/rand_util.h"
 #include "media/cast/constants.h"
@@ skipping 59 matching lines @@
     bool resend_last = missing_packet_set.find(kRtcpCastLastPacket) !=
         missing_packet_set.end();
 
     const SendPacketVector* stored_packets = storage_.GetFrame8(frame_id);
     if (!stored_packets)
       continue;
 
     for (SendPacketVector::const_iterator it = stored_packets->begin();
          it != stored_packets->end(); ++it) {
       const PacketKey& packet_key = it->first;
-      const uint16 packet_id = packet_key.second.second;
+      const uint16 packet_id = packet_key.packet_id;
 
       // Should we resend the packet?
       bool resend = resend_all;
 
       // Should we resend it because it's in the missing_packet_set?
       if (!resend &&
           missing_packet_set.find(packet_id) != missing_packet_set.end()) {
         resend = true;
       }
 
@@ skipping 63 matching lines @@
 int64 RtpSender::GetLastByteSentForFrame(uint32 frame_id) {
   const SendPacketVector* stored_packets = storage_.GetFrame8(frame_id & 0xFF);
   if (!stored_packets)
     return 0;
   PacketKey last_packet_key = stored_packets->rbegin()->first;
   return transport_->GetLastByteSentForPacket(last_packet_key);
 }
 
 }  //  namespace cast
 }  // namespace media