Break the dependency of DnsQuery and DnsResponse from AddressList

net/base/dns_response.h

 // 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_RESPONSE_H_
 #define NET_BASE_DNS_RESPONSE_H_
 #pragma once
 
 #include "net/base/dns_query.h"
 
 namespace net{
 
-class AddressList;
-
-// A class that encapsulates bits and pieces related to DNS response
-// processing.
+// Represents on-the-wire DNS response as an object; allows extracting
+// records.
 class DnsResponse {
  public:
   // Constructs an object with an IOBuffer large enough to read
   // one byte more than largest possible response, to detect malformed
   // responses; |query| is a pointer to the DnsQuery for which |this|
   // is supposed to be a response.
   explicit DnsResponse(DnsQuery* query);
   ~DnsResponse();
 
   // Internal buffer accessor into which actual bytes of response will be
   // read.
   IOBufferWithSize* io_buffer() { return io_buffer_.get(); }
 
-  // Parses response of size nbytes and puts address into |results|,
+  // Parses response of size nbytes and puts address into |ip_addresses|,
   // returns net_error code in case of failure.
-  int Parse(int nbytes, AddressList* results);
+  int Parse(int nbytes, std::vector<IPAddressNumber>* ip_addresses);
 
  private:
   // The matching query; |this| is the response for |query_|.  We do not
   // own it, lifetime of |this| should be within the limits of lifetime of
   // |query_|.
   const DnsQuery* const query_;
 
   // Buffer into which response bytes are read.
   scoped_refptr<IOBufferWithSize> io_buffer_;
 
   DISALLOW_COPY_AND_ASSIGN(DnsResponse);
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_DNS_RESPONSE_H_