Remove net::IPAddressNumber.

net/base/ip_address_number.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_BASE_IP_ADDRESS_NUMBER_H_
-#define NET_BASE_IP_ADDRESS_NUMBER_H_
-
-#include <vector>
-
-namespace net {
-
-// IPAddressNumber is used to represent an IP address's numeric value as an
-// array of bytes, from most significant to least significant. This is the
-// network byte ordering.
-//
-// IPv4 addresses will have length 4, whereas IPv6 address will have length 16.
-//
-// TODO(Martijnc): Remove the IPAddressNumber typedef. New code should use
-// IPAddress instead and existing code should be switched over.
-// https://crbug.com/496258
-typedef std::vector<unsigned char> IPAddressNumber;
-
-static const size_t kIPv4AddressSize = 4;
-static const size_t kIPv6AddressSize = 16;
-
-}  // namespace net
-
-#endif  // NET_BASE_IP_ADDRESS_NUMBER_H_