net: move IsHostnameNonUnique() into url_util.h

net/base/net_util.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_NET_UTIL_H_
 #define NET_BASE_NET_UTIL_H_
 
 #include <stdint.h>
 
 #include <string>
 
 #include "base/strings/string_piece.h"
 #include "net/base/net_export.h"
 
 namespace net {
 
 class AddressList;
 
-// Returns true if |hostname| contains a non-registerable or non-assignable
-// domain name (eg: a gTLD that has not been assigned by IANA) or an IP address
-// that falls in an IANA-reserved range.
-NET_EXPORT bool IsHostnameNonUnique(const std::string& hostname);
-
 // Returns the hostname of the current system. Returns empty string on failure.
 NET_EXPORT std::string GetHostName();
 
 // Resolves a local hostname (such as "localhost" or "localhost6") into
 // IP endpoints with the given port. Returns true if |host| is a local
 // hostname and false otherwise. Special IPv6 names (e.g. "localhost6")
 // will resolve to an IPv6 address only, whereas other names will
 // resolve to both IPv4 and IPv6.
 NET_EXPORT_PRIVATE bool ResolveLocalHostname(base::StringPiece host,
                                              uint16_t port,
                                              AddressList* address_list);
 
 // Returns true if |host| is one of the local hostnames
 // (e.g. "localhost") or IP addresses (IPv4 127.0.0.0/8 or IPv6 ::1).
 //
 // Note that this function does not check for IP addresses other than
 // the above, although other IP addresses may point to the local
 // machine.
 NET_EXPORT bool IsLocalhost(base::StringPiece host);
 
 }  // namespace net
 
 #endif  // NET_BASE_NET_UTIL_H_