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 17388a4d17c8b7f413f55756db22b01f44f488b7..66e0a127ba7340f78eb16ab198c1ca3df91b433e 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);