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

chrome/browser/extensions/api/mdns/dns_sd_device_lister.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_DEVICE_LISTER_H_
-#define CHROME_BROWSER_EXTENSIONS_API_MDNS_DNS_SD_DEVICE_LISTER_H_
-
-#include <string>
-
-#include "base/macros.h"
-#include "chrome/browser/extensions/api/mdns/dns_sd_delegate.h"
-#include "chrome/browser/local_discovery/service_discovery_device_lister.h"
-
-namespace local_discovery {
-class ServiceDiscoveryClient;
-}  // local_discovery
-
-namespace extensions {
-
-// Manages a watcher for a specific MDNS/DNS-SD service type and notifies
-// a delegate of changes to watched services.
-class DnsSdDeviceLister
-    : public local_discovery::ServiceDiscoveryDeviceLister::Delegate {
- public:
-  DnsSdDeviceLister(
-      local_discovery::ServiceDiscoveryClient* service_discovery_client,
-      DnsSdDelegate* delegate,
-      const std::string& service_type);
-  virtual ~DnsSdDeviceLister();
-
-  virtual void Discover(bool force_update);
-
- protected:
-  void OnDeviceChanged(
-      bool added,
-      const local_discovery::ServiceDescription& service_description) override;
-  void OnDeviceRemoved(const std::string& service_name) override;
-  void OnDeviceCacheFlushed() override;
-
- private:
-  // The delegate to notify of changes to services.
-  DnsSdDelegate* const delegate_;
-  local_discovery::ServiceDiscoveryDeviceLister device_lister_;
-  bool started_;
-
-  DISALLOW_COPY_AND_ASSIGN(DnsSdDeviceLister);
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_API_MDNS_DNS_SD_DEVICE_LISTER_H_