Migrate Local Discovery from net::IPAddressNumber to net::IPAddress.

chrome/tools/service_discovery_sniffer/service_discovery_sniffer.cc

Index: chrome/tools/service_discovery_sniffer/service_discovery_sniffer.cc
diff --git a/chrome/tools/service_discovery_sniffer/service_discovery_sniffer.cc b/chrome/tools/service_discovery_sniffer/service_discovery_sniffer.cc
index bc161ace23db47c2e3d72b8553ee5967b09ac092..e48edb8bb1bf1a0d3024768d84d2af39a616e54d 100644
--- a/chrome/tools/service_discovery_sniffer/service_discovery_sniffer.cc
+++ b/chrome/tools/service_discovery_sniffer/service_discovery_sniffer.cc
@@ -57,9 +57,8 @@ void ServicePrinter::OnServiceResolved(ServiceResolver::RequestStatus status,
     printf("\t\t%s\n", i->c_str());
   }
 
-  if (service.ip_address != net::IPAddressNumber()) {
-    printf("\tIP Address: %s\n", net::IPAddressToString(
-        service.ip_address).c_str());
+  if (service.ip_address.IsValid()) {
+    printf("\tIP Address: %s\n", service.ip_address.ToString().c_str());
   }
 }