Need a Linux impl for https://github.com/electron/electron/pull/12485
atom/browser/api/atom_api_top_level_window.cc
NativeWindowHandle handle = window_->GetNativeWindowHandle();
  return ToBuffer(isolate(), &handle, sizeof(handle));
}
void TopLevelWindow::SetProgressBar(double progress, mate::Arguments* args) {
  mate::Dictionary options;
  std::string mode;
  args->GetNext(&options) && options.Get("mode", &mode);
  NativeWindow::ProgressState state = NativeWindow::PROGRESS_NORMAL;
  if (mode == "error")
    state = NativeWindow::PROGRESS_ERROR;
  else if (mode == "paused")
    state = NativeWindow::PROGRESS_PAUSED;
  else if (mode == "indeterminate")
    state = NativeWindow::PROGRESS_INDETERMINATE;
  else if (mode == "none")
    state = NativeWindow::PROGRESS_NONE;
  window_->SetProgressBar(progress, state);
}
void TopLevelWindow::SetOverlayIcon(const gfx::Image& overlay,