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

net/tools/quic/quic_simple_server_stream.cc

 // Copyright (c) 2012 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/tools/quic/quic_simple_server_stream.h"
 
 #include <list>
 #include <utility>
 
 #include "base/logging.h"
 #include "base/stl_util.h"
-#include "net/quic/core/quic_bug_tracker.h"
 #include "net/quic/core/quic_flags.h"
 #include "net/quic/core/quic_spdy_stream.h"
 #include "net/quic/core/spdy_utils.h"
+#include "net/quic/platform/api/quic_bug_tracker.h"
 #include "net/quic/platform/api/quic_text_utils.h"
 #include "net/spdy/spdy_protocol.h"
 #include "net/tools/quic/quic_http_response_cache.h"
 #include "net/tools/quic/quic_simple_server_session.h"
 
 using base::StringPiece;
 using std::string;
 
 namespace net {
 
@@ skipping 231 matching lines @@
   DVLOG(1) << "Writing trailers (fin = true): "
            << response_trailers.DebugString();
   WriteTrailers(std::move(response_trailers), nullptr);
 }
 
 const char* const QuicSimpleServerStream::kErrorResponseBody = "bad";
 const char* const QuicSimpleServerStream::kNotFoundResponseBody =
     "file not found";
 
 }  // namespace net