Move quic_bug_tracker to quic/platform. No functional change expected.

net/quic/core/congestion_control/bandwidth_sampler.cc

 // Copyright 2016 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/core/congestion_control/bandwidth_sampler.h"
 
 #include <algorithm>
 
-#include "net/quic/core/quic_bug_tracker.h"
+#include "net/quic/platform/api/quic_bug_tracker.h"
 
 namespace net {
 BandwidthSampler::BandwidthSampler()
     : total_bytes_sent_(0),
       total_bytes_acked_(0),
       total_bytes_sent_at_last_acked_packet_(0),
       last_acked_packet_sent_time_(QuicTime::Zero()),
       last_acked_packet_ack_time_(QuicTime::Zero()),
       last_sent_packet_(0),
       is_app_limited_(false),
@@ skipping 126 matching lines @@
 }
 
 void BandwidthSampler::RemoveObsoletePackets(QuicPacketNumber least_unacked) {
   while (!connection_state_map_.empty() &&
          connection_state_map_.begin()->first < least_unacked) {
     connection_state_map_.pop_front();
   }
 }
 
 }  // namespace net