Add a new QUIC platform API for text utilities.

net/quic/core/quic_stream_sequencer.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/quic/core/quic_stream_sequencer.h"
 
 #include <algorithm>
 #include <limits>
 #include <string>
 #include <utility>
 
 #include "base/format_macros.h"
 #include "base/logging.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/stringprintf.h"
 #include "net/quic/core/quic_bug_tracker.h"
 #include "net/quic/core/quic_flags.h"
 #include "net/quic/core/quic_packets.h"
 #include "net/quic/core/quic_stream.h"
 #include "net/quic/core/quic_stream_sequencer_buffer.h"
 #include "net/quic/core/quic_utils.h"
 #include "net/quic/platform/api/quic_clock.h"
 #include "net/quic/platform/api/quic_str_cat.h"
 
-using base::IntToString;
 using base::StringPiece;
-using base::StringPrintf;
 using std::string;
 
 namespace net {
 
 QuicStreamSequencer::QuicStreamSequencer(QuicStream* quic_stream,
                                          const QuicClock* clock)
     : stream_(quic_stream),
       buffered_frames_(kStreamReceiveWindowLimit),
       close_offset_(std::numeric_limits<QuicStreamOffset>::max()),
       blocked_(false),
@@ skipping 188 matching lines @@
                 "\n  bytes buffered: ", NumBytesBuffered(),
                 "\n  bytes consumed: ", NumBytesConsumed(),
                 "\n  has bytes to read: ", HasBytesToRead() ? "true" : "false",
                 "\n  frames received: ", num_frames_received(),
                 "\n  close offset bytes: ", close_offset_,
                 "\n  is closed: ", IsClosed() ? "true" : "false");
   // clang-format on
 }
 
 }  // namespace net