Add the ability for MDnsListener to actively refresh records

net/dns/mdns_client.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 NET_DNS_MDNS_CLIENT_H_
 #define NET_DNS_MDNS_CLIENT_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 95 matching lines @@
     // disconnecting).
     virtual void OnCachePurged() = 0;
   };
 
   // Destroying the listener stops listening.
   virtual ~MDnsListener() {}
 
   // Start the listener. Return true on success.
   virtual bool Start() = 0;
 
+  // Actively refresh any received records.
+  virtual void SetActiveRefresh(bool active_refresh) = 0;
+
   // Get the host or service name for this query.
   // Return an empty string for no name.
   virtual const std::string& GetName() const = 0;
 
   // Get the type for this query (SRV, TXT, A, AAA, etc)
   virtual uint16 GetType() const = 0;
 };
 
 // Creates bound datagram sockets ready to use by MDnsClient.
 class NET_EXPORT MDnsSocketFactory {
@@ skipping 49 matching lines @@
 // Create sockets, binds socket to MDns endpoint, and sets multicast interface
 // and joins multicast group on for |interface_index|.
 // Returns NULL if failed.
 NET_EXPORT scoped_ptr<DatagramServerSocket> CreateAndBindMDnsSocket(
     AddressFamily address_family,
     uint32 interface_index);
 
 }  // namespace net
 
 #endif  // NET_DNS_MDNS_CLIENT_H_