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

net/quic/core/congestion_control/bbr_sender.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/bbr_sender.h"
 
 #include <algorithm>
 #include <sstream>
 
 #include "base/stl_util.h"
 #include "net/quic/core/congestion_control/rtt_stats.h"
-#include "net/quic/core/quic_bug_tracker.h"
 #include "net/quic/core/quic_flags.h"
+#include "net/quic/platform/api/quic_bug_tracker.h"
 
 namespace net {
 
 namespace {
 // Constants based on TCP defaults.
 const QuicByteCount kMaxSegmentSize = kDefaultTCPMSS;
 // The minimum CWND to ensure delayed acks don't reduce bandwidth measurements.
 // Does not inflate the pacing rate.
 const QuicByteCount kMinimumCongestionWindow = 4 * kMaxSegmentSize;
 
@@ skipping 550 matching lines @@
   os << "Minimum RTT timestamp: " << state.min_rtt_timestamp.ToDebuggingValue()
      << std::endl;
 
   os << "Last sample is app-limited: "
      << (state.last_sample_is_app_limited ? "yes" : "no");
 
   return os;
 }
 
 }  // namespace net