Revert 151586 - [net/dns] Resolve AF_UNSPEC on dual-stacked systems. Sort addresses according to RF…

net/dns/address_sorter.h

Index: net/dns/address_sorter.h
===================================================================
--- net/dns/address_sorter.h	(revision 151600)
+++ net/dns/address_sorter.h	(working copy)
@@ -1,46 +0,0 @@
-// 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_DNS_ADDRESS_SORTER_H_
-#define NET_DNS_ADDRESS_SORTER_H_
-
-#include "base/basictypes.h"
-#include "base/callback.h"
-#include "base/memory/scoped_ptr.h"
-#include "net/base/net_export.h"
-
-namespace net {
-
-class AddressList;
-
-// Sorts AddressList according to RFC3484, by likelihood of successful
-// connection. Depending on the platform, the sort could be performed
-// asynchronously by the OS, or synchronously by local implementation.
-// AddressSorter does not necessarily preserve port numbers on the sorted list.
-class NET_EXPORT AddressSorter {
- public:
-  typedef base::Callback<void(bool success,
-                              const AddressList& list)> CallbackType;
-
-  virtual ~AddressSorter() {}
-
-  // Sorts |list|, which must include at least one IPv6 address.
-  // Calls |callback| upon completion. Could complete synchronously. Could
-  // complete after this AddressSorter is destroyed.
-  virtual void Sort(const AddressList& list,
-                    const CallbackType& callback) const = 0;
-
-  // Creates platform-dependent AddressSorter.
-  static scoped_ptr<AddressSorter> CreateAddressSorter();
-
- protected:
-  AddressSorter() {}
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(AddressSorter);
-};
-
-}  // namespace net
-
-#endif  // NET_DNS_ADDRESS_SORTER_H_