Clean up type usage and fix MSVC "truncated value" warnings in net/quic/.

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 <algorithm>
 
 #include "base/logging.h"
 #include "base/stl_util.h"
@@ skipping 267 matching lines @@
     if (ContainsKey(ack_frame.missing_packets, sequence_number)) {
       // Don't continue to increase the nack count for packets not in flight.
       if (!it->in_flight) {
         continue;
       }
       // Consider it multiple nacks when there is a gap between the missing
       // packet and the largest observed, since the purpose of a nack
       // threshold is to tolerate re-ordering.  This handles both StretchAcks
       // and Forward Acks.
       // The nack count only increases when the largest observed increases.
-      size_t min_nacks = ack_frame.largest_observed - sequence_number;
+      QuicPacketCount min_nacks = ack_frame.largest_observed - sequence_number;
       // Truncated acks can nack the largest observed, so use a min of 1.
       if (min_nacks == 0) {
         min_nacks = 1;
       }
       unacked_packets_.NackPacket(sequence_number, min_nacks);
       continue;
     }
     // Packet was acked, so remove it from our unacked packet list.
     DVLOG(1) << ENDPOINT << "Got an ack for packet " << sequence_number;
     // If data is associated with the most recent transmission of this
@@ skipping 634 matching lines @@
   // Set up a pacing sender with a 1 millisecond alarm granularity, the same as
   // the default granularity of the Linux kernel's FQ qdisc.
   using_pacing_ = true;
   send_algorithm_.reset(
       new PacingSender(send_algorithm_.release(),
                        QuicTime::Delta::FromMilliseconds(1),
                        kInitialUnpacedBurst));
 }
 
 }  // namespace net