Revert 87809 - Added DnsQuery class

net/base/dns_query.h

Index: net/base/dns_query.h
===================================================================
--- net/base/dns_query.h	(revision 87811)
+++ net/base/dns_query.h	(working copy)
@@ -1,71 +0,0 @@
-// Copyright (c) 2011 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_DNS_QUERY_H_
-#define NET_BASE_DNS_QUERY_H_
-#pragma once
-
-#include <string>
-
-#include "net/base/address_family.h"
-#include "net/base/io_buffer.h"
-#include "net/base/net_util.h"
-
-namespace net{
-
-// A class that encapsulates bits and pieces related to DNS request processing.
-class DnsQuery {
- public:
-  // Constructs an object containing an IOBuffer with raw DNS query string
-  // for |hostname| with the given |address_family|; |port| is here due to
-  // legacy -- getaddrinfo() takes service name, which is mapped to some
-  // port and returns sockaddr_in structures with ports filled in, so do we
-  // -- look at DnsResponse::Parse() to see where it is used.
-
-  // Every generated object has a random ID, hence two objects generated
-  // with the same set of constructor arguments are generally not equal;
-  // there is a 1/2^16 chance of them being equal due to size of |id_|.
-  DnsQuery(const std::string& hostname, AddressFamily address_family, int port);
-
-  // Returns true if the constructed object was valid.
-  bool IsValid() const { return io_buffer_.get() != NULL; }
-
-  // DnsQuery field accessors.  These should only be called on an object
-  // for whom |IsValid| is true.
-  int port() const;
-  uint16 id() const;
-  uint16 qtype() const;
-  AddressFamily address_family() const;
-  const std::string& hostname() const;
-
-  // IOBuffer accessor to be used for writing out the query.
-  IOBufferWithSize* io_buffer() const;
-
- private:
-  // Port to be used by corresponding DnsResponse when filling sockaddr_ins
-  // to be returned.
-  int port_;
-
-  // ID of the query.
-  uint16 id_;
-
-  // Type of query, currently, either A or AAAA.
-  uint16 qtype_;
-
-  // Address family of the query; used when constructing new object from
-  // this one.
-  AddressFamily address_family_;
-
-  // Hostname that we are trying to resolve.
-  std::string hostname_;
-
-  // Contains query bytes to be consumed by higher level Write() call.
-  scoped_refptr<IOBufferWithSize> io_buffer_;
-
-  DISALLOW_COPY_AND_ASSIGN(DnsQuery);
-};
-
-}  // namespace net
-
-#endif  // NET_BASE_DNS_QUERY_H_