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

services/native_viewport/native_viewport_impl.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 "services/native_viewport/native_viewport_impl.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 110 matching lines @@
 void NativeViewportImpl::OnAcceleratedWidgetDestroyed() {
   context_provider_.SetAcceleratedWidget(gfx::kNullAcceleratedWidget);
 }
 
 bool NativeViewportImpl::OnEvent(mojo::EventPtr event) {
   if (event.is_null() || !event_dispatcher_.get())
     return false;
 
   mojo::NativeViewportEventDispatcher::OnEventCallback callback;
   switch (event->action) {
-    case mojo::EVENT_TYPE_POINTER_MOVE: {
+    case mojo::EventType::POINTER_MOVE: {
       // TODO(sky): add logic to remember last event location and not send if
       // the same.
       if (pointers_waiting_on_ack_.count(event->pointer_data->pointer_id))
         return false;
 
       pointers_waiting_on_ack_.insert(event->pointer_data->pointer_id);
       callback =
           base::Bind(&NativeViewportImpl::AckEvent, weak_factory_.GetWeakPtr(),
                      event->pointer_data->pointer_id);
       break;
     }
 
-    case mojo::EVENT_TYPE_POINTER_CANCEL:
+    case mojo::EventType::POINTER_CANCEL:
       pointers_waiting_on_ack_.clear();
       break;
 
-    case mojo::EVENT_TYPE_POINTER_UP:
+    case mojo::EventType::POINTER_UP:
       pointers_waiting_on_ack_.erase(event->pointer_data->pointer_id);
       break;
 
     default:
       break;
   }
 
   event_dispatcher_->OnEvent(event.Pass(), callback);
   return false;
 }
 
 void NativeViewportImpl::OnDestroyed() {
   delete this;
 }
 
 void NativeViewportImpl::AckEvent(int32 pointer_id) {
   pointers_waiting_on_ack_.erase(pointer_id);
 }
 
 }  // namespace native_viewport