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

examples/wm_flow/app/app.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 <map>
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/stl_util.h"
 #include "examples/bitmap_uploader/bitmap_uploader.h"
@@ skipping 144 matching lines @@
     embeddee_->HelloBack(base::Bind(&WMFlowApp::HelloBackAck,
                                     base::Unretained(this)));
   }
   void OnViewManagerDisconnected(mojo::ViewManager* view_manager) override {
     STLDeleteValues(&uploaders_);
   }
 
   // Overridden from mojo::ViewObserver:
   void OnViewInputEvent(mojo::View* view,
                         const mojo::EventPtr& event) override {
-    if (event->action == mojo::EVENT_TYPE_POINTER_UP &&
-        event->flags & mojo::EVENT_FLAGS_LEFT_MOUSE_BUTTON) {
+    if (event->action == mojo::EventType::POINTER_UP &&
+        event->flags & mojo::EventFlags::LEFT_MOUSE_BUTTON) {
       OpenNewWindow();
     }
   }
   void OnViewDestroyed(mojo::View* view) override {
     if (uploaders_.find(view) != uploaders_.end()) {
       delete uploaders_[view];
       uploaders_.erase(view);
     }
     --embed_count_;
     view->RemoveObserver(this);
@@ skipping 16 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(WMFlowApp);
 };
 
 }  // namespace examples
 
 MojoResult MojoMain(MojoHandle application_request) {
   mojo::ApplicationRunnerChromium runner(new examples::WMFlowApp);
   return runner.Run(application_request);
 }