Got disabled in chromium 71 upgrade https://github.com/electron/electron/commit/798b2a3ffd55c477af6258f0afb71000c9f8ecde

/cc @brenca @codebytere 
atom/browser/osr/osr_render_widget_host_view.cc
return const_cast<ui::Layer*>(root_layer_.get());
}
bool OffScreenRenderWidgetHostView::DelegatedFrameHostIsVisible() const {
  return is_showing_;
}
SkColor OffScreenRenderWidgetHostView::DelegatedFrameHostGetGutterColor()
    const {
  if (render_widget_host_->delegate() &&
      render_widget_host_->delegate()->IsFullscreenForCurrentTab()) {
    return SK_ColorWHITE;
  }
  return background_color_;
}
void OffScreenRenderWidgetHostView::OnFirstSurfaceActivation(