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
current_device_scale_factor_ = kDefaultScaleFactor;
  local_surface_id_ = local_surface_id_allocator_.GenerateId();
#if defined(OS_MACOSX)
  last_frame_root_background_color_ = SK_ColorTRANSPARENT;
  CreatePlatformWidget(is_guest_view_hack);
#endif
  bool opaque = SkColorGetA(background_color_) == SK_AlphaOPAQUE;
  GetRootLayer()->SetFillsBoundsOpaquely(opaque);
  GetRootLayer()->SetColor(background_color_);
#if !defined(OS_MACOSX)
  
  content::ImageTransportFactory* factory =
      content::ImageTransportFactory::GetInstance();
  ui::ContextFactoryPrivate* context_factory_private =
      factory->GetContextFactoryPrivate();
  compositor_.reset(
      new ui::Compositor(context_factory_private->AllocateFrameSinkId(),
                         content::GetContextFactory(), context_factory_private,
                         base::ThreadTaskRunnerHandle::Get(),
                         features::IsSurfaceSynchronizationEnabled(),
                         false ));
  compositor_->SetAcceleratedWidget(gfx::kNullAcceleratedWidget);
  compositor_->SetRootLayer(root_layer_.get());
#endif
  GetCompositor()->SetDelegate(this);
  ResizeRootLayer(false);
  render_widget_host_->SetView(this);
  InstallTransparency();
}
OffScreenRenderWidgetHostView::~OffScreenRenderWidgetHostView() {