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

examples/spinning_cube/gles2_client_impl.cc

 // Copyright 2013 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.
 
 #ifndef GL_GLEXT_PROTOTYPES
 #define GL_GLEXT_PROTOTYPES
 #endif
 
 #include "examples/spinning_cube/gles2_client_impl.h"
 
@@ skipping 59 matching lines @@
   size_ = size;
   cube_.set_size(size_.width, size_.height);
   if (size_.width == 0 || size_.height == 0 || !context_)
     return;
   MGLResizeSurface(size_.width, size_.height);
   WantToDraw();
 }
 
 void GLES2ClientImpl::HandleInputEvent(const mojo::Event& event) {
   switch (event.action) {
-    case mojo::EVENT_TYPE_POINTER_DOWN:
-      if (event.flags & mojo::EVENT_FLAGS_RIGHT_MOUSE_BUTTON)
+    case mojo::EventType::POINTER_DOWN:
+      if (event.flags & mojo::EventFlags::RIGHT_MOUSE_BUTTON)
         break;
       capture_point_.x = event.pointer_data->x;
       capture_point_.y = event.pointer_data->y;
       last_drag_point_ = capture_point_;
       drag_start_time_ = mojo::GetTimeTicksNow();
       cube_.SetFlingMultiplier(0.0f, 1.0f);
       break;
-    case mojo::EVENT_TYPE_POINTER_MOVE: {
-      if (!(event.flags & mojo::EVENT_FLAGS_LEFT_MOUSE_BUTTON) &&
-          event.pointer_data->kind == mojo::POINTER_KIND_MOUSE) {
+    case mojo::EventType::POINTER_MOVE: {
+      if (!(event.flags & mojo::EventFlags::LEFT_MOUSE_BUTTON) &&
+          event.pointer_data->kind == mojo::PointerKind::MOUSE) {
         break;
       }
       mojo::PointF event_location;
       event_location.x = event.pointer_data->x;
       event_location.y = event.pointer_data->y;
       int direction = GetEventDirection(event_location,
                                         capture_point_,
                                         last_drag_point_);
       cube_.UpdateForDragDistance(
           direction * CalculateDragDistance(last_drag_point_, event_location));
       WantToDraw();
 
       last_drag_point_ = event_location;
       break;
     }
-    case mojo::EVENT_TYPE_POINTER_UP: {
-      if (event.flags & mojo::EVENT_FLAGS_RIGHT_MOUSE_BUTTON) {
+    case mojo::EventType::POINTER_UP: {
+      if (event.flags & mojo::EventFlags::RIGHT_MOUSE_BUTTON) {
         cube_.set_color(GetRandomColor(), GetRandomColor(), GetRandomColor());
         break;
       }
       mojo::PointF event_location;
       event_location.x = event.pointer_data->x;
       event_location.y = event.pointer_data->y;
       MojoTimeTicks offset = mojo::GetTimeTicksNow() - drag_start_time_;
       float delta = static_cast<float>(offset) / 1000000.f;
       // Last drag point is the same as current point here; use initial capture
       // point instead
@@ skipping 55 matching lines @@
   float delta = static_cast<float>(offset) / 1000000.;
   last_time_ = now;
   cube_.UpdateForTimeDelta(delta);
   cube_.Draw();
 
   MGLSwapBuffers();
   WantToDraw();
 }
 
 }  // namespace examples