Refactored to make MDnsSocketFactory return array of sockets.

net/dns/mdns_client.h

Index: net/dns/mdns_client.h
diff --git a/net/dns/mdns_client.h b/net/dns/mdns_client.h
index 71006d69b0110df80e14969b262c4136aaadd56a..b4a1bc671dd11c735ca47de6bf9a0668f3be345e 100644
--- a/net/dns/mdns_client.h
+++ b/net/dns/mdns_client.h
@@ -16,6 +16,7 @@
 
 namespace net {
 
+class DatagramServerSocket;
 class RecordParsed;
 
 // Represents a one-time record lookup. A transaction takes one
@@ -120,6 +121,15 @@ class NET_EXPORT MDnsListener {
   virtual uint16 GetType() const = 0;
 };
 
+// Creates bound datagram sockets ready to use by MDnsClient.
+class NET_EXPORT MDnsSocketFactory {
+ public:
+  virtual ~MDnsSocketFactory() {}
+  virtual void CreateSockets(ScopedVector<DatagramServerSocket>* sockets) = 0;
+
+  static scoped_ptr<MDnsSocketFactory> CreateDefault();
+};
+
 // Listens for Multicast DNS on the local network. You can access information
 // regarding multicast DNS either by creating an |MDnsListener| to be notified
 // of new records, or by creating an |MDnsTransaction| to look up the value of a
@@ -144,7 +154,7 @@ class NET_EXPORT MDnsClient {
       int flags,
       const MDnsTransaction::ResultCallback& callback) = 0;
 
-  virtual bool StartListening() = 0;
+  virtual bool StartListening(MDnsSocketFactory* factory) = 0;
 
   // Do not call this inside callbacks from related MDnsListener and
   // MDnsTransaction objects.