Add a new QUIC platform API for text utilities.

net/quic/core/quic_utils.h

 // 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.
 
 #ifndef NET_QUIC_CORE_QUIC_UTILS_H_
 #define NET_QUIC_CORE_QUIC_UTILS_H_
 
 #include <cstddef>
 #include <cstdint>
 #include <string>
@@ skipping 47 matching lines @@
   // 7 bytes of |packet_number|.
   static uint64_t PackPathIdAndPacketNumber(QuicPathId path_id,
                                             QuicPacketNumber packet_number);
 
   // Determines and returns change type of address change from |old_address| to
   // |new_address|.
   static PeerAddressChangeType DetermineAddressChangeType(
       const QuicSocketAddress& old_address,
       const QuicSocketAddress& new_address);
 
-  // This converts |length| bytes of binary to a 2*|length|-character
-  // hexadecimal representation.
-  // Return value: 2*|length| characters of ASCII std::string.
-  static std::string HexEncode(const char* data, size_t length);
-  static std::string HexEncode(base::StringPiece data);
-
-  // Converts |data| from a hexadecimal ASCII std::string to binary.
-  static std::string HexDecode(base::StringPiece data);
-
-  // Returns a std::string containing hex and ASCII representations of |binary|,
-  // side-by-side in the style of hexdump. Non-printable characters will be
-  // printed as '.' in the ASCII output.
-  // For example:
-  // "0x0000:  4865 6c6c 6f2c 2051 5549 4321 0102 0304  Hello,.QUIC!...."
-  static std::string HexDump(base::StringPiece binary_data);
-
  private:
   DISALLOW_COPY_AND_ASSIGN(QuicUtils);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CORE_QUIC_UTILS_H_