should be reenabled. cc @felixrieseberg
atom/browser/api/atom_api_web_contents.cc
GURL("chrome-guest://fake-host"));
    content::WebContents::CreateParams params(session->browser_context(),
                                              site_instance);
    guest_delegate_.reset(
        new WebViewGuestDelegate(embedder_->web_contents(), this));
    params.guest_delegate = guest_delegate_.get();
#if defined(ENABLE_OSR)
    if (embedder_ && embedder_->IsOffScreen()) {
      auto* view = new OffScreenWebContentsView(
          false, base::Bind(&WebContents::OnPaint, base::Unretained(this)));
      params.view = view;
      params.delegate_view = view;
      web_contents = content::WebContents::Create(params);
      view->SetWebContents(web_contents);
    } else {
#endif
      web_contents = content::WebContents::Create(params);
#if defined(ENABLE_OSR)
    }
  } else if (IsOffScreen()) {
    bool transparent = false;
    options.Get("transparent", &transparent);
    content::WebContents::CreateParams params(session->browser_context());
    auto* view = new OffScreenWebContentsView(
        transparent, base::Bind(&WebContents::OnPaint, base::Unretained(this)));
    params.view = view;
    params.delegate_view = view;
    web_contents = content::WebContents::Create(params);
    view->SetWebContents(web_contents);
#endif