Add support for default local address in IpcNetworkManager

content/browser/renderer_host/p2p/socket_dispatcher_host.h

Index: content/browser/renderer_host/p2p/socket_dispatcher_host.h
diff --git a/content/browser/renderer_host/p2p/socket_dispatcher_host.h b/content/browser/renderer_host/p2p/socket_dispatcher_host.h
index 18b18df22721a047bd76d035057fe2e4f81d816a..ec1945309c21011b3222f6f58c9539af57e6c545 100644
--- a/content/browser/renderer_host/p2p/socket_dispatcher_host.h
+++ b/content/browser/renderer_host/p2p/socket_dispatcher_host.h
@@ -90,7 +90,14 @@ class P2PSocketDispatcherHost
   void OnDestroySocket(int socket_id);
 
   void DoGetNetworkList();
-  void SendNetworkList(const net::NetworkInterfaceList& list);
+  void SendNetworkList(const net::NetworkInterfaceList& list,
+                       const net::IPAddressNumber& default_ipv4_local_address,
+                       const net::IPAddressNumber& default_ipv6_local_address);
+
+  // This connects a UDP socket to a public IP address and gets local
+  // address. Since it binds to the "any" address (0.0.0.0 or ::) internally, it
+  // retrieves the default local address.
+  net::IPAddressNumber GetDefaultLocalAddress(int family);
 
   void OnAddressResolved(DnsRequest* request,
                          const net::IPAddressList& addresses);
@@ -107,6 +114,9 @@ class P2PSocketDispatcherHost
   std::set<DnsRequest*> dns_requests_;
   P2PMessageThrottler throttler_;
 
+  net::IPAddressNumber default_ipv4_local_address_;
+  net::IPAddressNumber default_ipv6_local_address_;
+
   bool dump_incoming_rtp_packet_;
   bool dump_outgoing_rtp_packet_;
   RenderProcessHost::WebRtcRtpPacketCallback packet_callback_;