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

/cc @brenca @codebytere 
atom/browser/osr/osr_render_widget_host_view.h
void UpdateBackgroundColorFromRenderer(SkColor color);
  
  content::RenderWidgetHostImpl* render_widget_host_;
  OffScreenRenderWidgetHostView* parent_host_view_ = nullptr;
  OffScreenRenderWidgetHostView* popup_host_view_ = nullptr;
  std::unique_ptr<SkBitmap> popup_bitmap_;
  OffScreenRenderWidgetHostView* child_host_view_ = nullptr;
  std::set<OffScreenRenderWidgetHostView*> guest_host_views_;
  std::set<OffscreenViewProxy*> proxy_views_;
  OffScreenOutputDevice* software_output_device_ = nullptr;
  const bool transparent_;
  OnPaintCallback callback_;
  OnPaintCallback parent_callback_;
  int frame_rate_ = 0;
  int frame_rate_threshold_us_ = 0;
  base::Time last_time_ = base::Time::Now();
  gfx::Vector2dF last_scroll_offset_;
  gfx::Size size_;
  bool painting_;
  bool is_showing_ = false;
  bool is_destroyed_ = false;
  gfx::Rect popup_position_;
  bool hold_resize_ = false;
  bool pending_resize_ = false;
  bool paint_callback_running_ = false;
  viz::LocalSurfaceId local_surface_id_;
  viz::ParentLocalSurfaceIdAllocator local_surface_id_allocator_;
  std::unique_ptr<ui::Layer> root_layer_;
  std::unique_ptr<ui::Compositor> compositor_;