Change mojo enums to be scoped enums in the generated C++ bindings.

mojo/services/network/udp_socket_apptest.cc

Index: mojo/services/network/udp_socket_apptest.cc
diff --git a/mojo/services/network/udp_socket_apptest.cc b/mojo/services/network/udp_socket_apptest.cc
index b7e98d482a71aa7f3f7a2eeeaf79bb3025d62b8e..8141194e8965afdffa0bf413be8466609900f58a 100644
--- a/mojo/services/network/udp_socket_apptest.cc
+++ b/mojo/services/network/udp_socket_apptest.cc
@@ -26,7 +26,7 @@ namespace {
 
 NetAddressPtr GetLocalHostWithAnyPort() {
   NetAddressPtr addr(NetAddress::New());
-  addr->family = NET_ADDRESS_FAMILY_IPV4;
+  addr->family = NetAddressFamily::IPV4;
   addr->ipv4 = NetAddressIPv4::New();
   addr->ipv4->port = 0;
   addr->ipv4->addr.resize(4);