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

chrome/tools/service_discovery_sniffer/service_discovery_sniffer.cc

 // 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.
 
 #include <vector>
 
 #include "base/at_exit.h"
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 39 matching lines @@
   }
 
   printf("\tAddress: %s:%d\n", service.address.host().c_str(),
          service.address.port());
   printf("\tMetadata: \n");
   for (std::vector<std::string>::const_iterator i = service.metadata.begin();
        i != service.metadata.end(); i++) {
     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());
   }
 }
 
 ServiceTypePrinter::ServiceTypePrinter(ServiceDiscoveryClient* client,
                                        const std::string& service_type)
     : client_(client)  {
   watcher_ = client_->CreateServiceWatcher(
       service_type, base::Bind(&ServiceTypePrinter::OnServiceUpdated,
                                base::Unretained(this)));
 }
@@ skipping 40 matching lines @@
   {
     // To guarantee/make explicit the ordering constraint.
     local_discovery::ServiceTypePrinter print_changes(
         service_discovery_client.get(),
         std::string(argv[1]) + "._tcp.local");
 
     print_changes.Start();
     message_loop.Run();
   }
 }