|  | // Copyright 2014 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. | 
|  |  | 
|  | #include "base/callback_forward.h" | 
|  | #include "net/dns/dns_config_service_posix.h" | 
|  | #include "net/dns/notify_watcher_mac.h" | 
|  |  | 
|  | namespace net { | 
|  | namespace internal { | 
|  |  | 
|  | // Watches DNS configuration on Mac. | 
|  | class DnsConfigWatcher { | 
|  | public: | 
|  | bool Watch(const base::Callback<void(bool succeeded)>& callback); | 
|  |  | 
|  | // Returns an error if the DNS configuration is invalid. | 
|  | // Returns CONFIG_PARSE_POSIX_OK otherwise. | 
|  | static ConfigParsePosixResult CheckDnsConfig(); | 
|  |  | 
|  | private: | 
|  | NotifyWatcherMac watcher_; | 
|  | }; | 
|  |  | 
|  | }  // namespace internal | 
|  | }  // namespace net |