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

examples/http_handler/http_handler.cc

 // Copyright 2014 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 "base/bind.h"
 #include "mojo/application/application_runner_chromium.h"
 #include "mojo/public/c/system/main.h"
 #include "mojo/public/cpp/application/application_delegate.h"
 #include "mojo/public/cpp/application/application_impl.h"
 #include "mojo/public/cpp/bindings/interface_ptr.h"
@@ skipping 18 matching lines @@
  private:
   // ApplicationDelegate:
   void Initialize(ApplicationImpl* app) override {
     http_server::HttpHandlerPtr http_handler_ptr;
     binding_.Bind(GetProxy(&http_handler_ptr));
 
     http_server::HttpServerFactoryPtr http_server_factory;
     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] = 0;
     local_address->ipv4->addr[1] = 0;
     local_address->ipv4->addr[2] = 0;
     local_address->ipv4->addr[3] = 0;
     local_address->ipv4->port = 8080;
     http_server_factory->CreateHttpServer(GetProxy(&http_server_).Pass(),
                                           local_address.Pass());
 
@@ skipping 20 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(HttpHandler);
 };
 
 }  // namespace examples
 }  // namespace mojo
 
 MojoResult MojoMain(MojoHandle application_request) {
   mojo::ApplicationRunnerChromium runner(new mojo::examples::HttpHandler());
   return runner.Run(application_request);
 }