For c++, Generate enum classes instead of enum from mojom.

services/debugger/debugger.cc

Index: services/debugger/debugger.cc
diff --git a/services/debugger/debugger.cc b/services/debugger/debugger.cc
index b03aa4222e2daf84e72e59803ed39af8f459228c..6c6761c97823049072d8ecae1dcdfd4ce46b7253 100644
--- a/services/debugger/debugger.cc
+++ b/services/debugger/debugger.cc
@@ -56,7 +56,7 @@ class Debugger : public mojo::ApplicationDelegate,
     app->ConnectToService("mojo:http_server", &http_server_factory);
 
     mojo::NetAddressPtr local_address(mojo::NetAddress::New());
-    local_address->family = mojo::NET_ADDRESS_FAMILY_IPV4;
+    local_address->family = mojo::NetAddressFamily::IPV4;
     local_address->ipv4 = mojo::NetAddressIPv4::New();
     local_address->ipv4->addr.resize(4);
     local_address->ipv4->addr[0] = 127;