[mDns] Move dns_sd_registry from extension/api/mdns to media/router/discovery/mdns

chrome/browser/extensions/api/mdns/dns_sd_delegate.h

-// Copyright 2013 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 CHROME_BROWSER_EXTENSIONS_API_MDNS_DNS_SD_DELEGATE_H_
-#define CHROME_BROWSER_EXTENSIONS_API_MDNS_DNS_SD_DELEGATE_H_
-
-#include <string>
-#include <vector>
-
-namespace extensions {
-
-struct DnsSdService {
-  std::string service_name;
-  std::string service_host_port;
-  std::string ip_address;
-  std::vector<std::string> service_data;
-
-  DnsSdService();
-  DnsSdService(const DnsSdService& other);
-  virtual ~DnsSdService();
-
-  bool operator==(const DnsSdService& other) const {
-    return service_name == other.service_name &&
-           service_host_port == other.service_host_port &&
-           ip_address == other.ip_address &&
-           service_data == other.service_data;
-  }
-
-  bool operator!=(const DnsSdService& other) const {
-    return !(*this == other);
-  }
-};
-
-// Delegate that is notified when a watched service is added, updated or
-// removed.
-class DnsSdDelegate {
- public:
-  virtual void ServiceChanged(const std::string& service_type,
-                              bool added,
-                              const DnsSdService& service) = 0;
-  virtual void ServiceRemoved(const std::string& service_type,
-                              const std::string& service_name) = 0;
-  virtual void ServicesFlushed(const std::string& service_type) = 0;
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_API_MDNS_DNS_SD_DELEGATE_H_