During upgrade to the Chromium 61 we have switched from GTK2 to GTK3
and now we have a few warnings about stuff being deprecated in GTK3.
Check any Linux build to get a list of them.

/cc @zcbenz 
atom/browser/ui/views/menu_bar.cc
return kViewClassName;
}
void MenuBar::OnMenuButtonClicked(views::MenuButton* source,
                                  const gfx::Point& point,
                                  const ui::Event* event) {
  
  SetAcceleratorVisibility(false);
  if (!menu_model_)
    return;
  if (!window_->IsFocused())
    window_->Focus(true);
  int id = source->tag();
  AtomMenuModel::ItemType type = menu_model_->GetTypeAt(id);
  if (type != AtomMenuModel::TYPE_SUBMENU) {
    menu_model_->ActivatedAt(id, 0);
    return;
  }
  
  MenuDelegate* menu_delegate = new MenuDelegate(this);
  menu_delegate->RunMenu(menu_model_->GetSubmenuModelAt(id), source);
}
void MenuBar::OnNativeThemeChanged(const ui::NativeTheme* theme) {