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/message_box_gtk.cc
gtk_widget_hide(dialog_);
  if (response < 0)
    callback_.Run(cancel_id_, checkbox_checked_);
  else
    callback_.Run(response, checkbox_checked_);
  delete this;
}
void GtkMessageBox::OnCheckboxToggled(GtkWidget* widget) {
  checkbox_checked_ = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(widget));
}
}  
int ShowMessageBox(NativeWindow* parent,
                   MessageBoxType type,
                   const std::vector<std::string>& buttons,
                   int default_id,
                   int cancel_id,
                   int options,
                   const std::string& title,
                   const std::string& message,
                   const std::string& detail,
                   const gfx::ImageSkia& icon) {
  return GtkMessageBox(parent, type, buttons, default_id, cancel_id, title,
                       message, detail, "", false, icon)
      .RunSynchronous();
}
void ShowMessageBox(NativeWindow* parent,