[net/dns] Removes locking from DnsConfigServiceWin and adds local computer name.

net/dns/dns_hosts.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_DNS_DNS_HOSTS_H_
 #define NET_DNS_DNS_HOSTS_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 30 matching lines @@
 // A SerialWorker that reads a HOSTS file and runs Callback.
 // Call WorkNow() to indicate file needs to be re-read.
 // Call Cancel() to disable the callback.
 class NET_EXPORT_PRIVATE DnsHostsReader
     : NON_EXPORTED_BASE(public SerialWorker) {
  public:
   typedef base::Callback<void(const DnsHosts& hosts)> CallbackType;
 
   DnsHostsReader(const FilePath& path, const CallbackType& callback);
 
- private:
+  const FilePath& path() const { return path_; }
+
+ protected:
+  explicit DnsHostsReader(const FilePath& path);
   virtual ~DnsHostsReader();
 
   virtual void DoWork() OVERRIDE;
   virtual void OnWorkFinished() OVERRIDE;
 
   FilePath path_;
   CallbackType callback_;
   // Written in DoWork, read in OnWorkFinished, no locking necessary.
   DnsHosts dns_hosts_;
   bool success_;
 
   DISALLOW_COPY_AND_ASSIGN(DnsHostsReader);
 };
 
 
 }  // namespace net
 
 #endif  // NET_DNS_DNS_HOSTS_H_