link-header-preload-delay-onload.html.headers
Link: </preload/resources/square.png?background>;rel=preload;as=image
Link: </preload/resources/dummy.js?link-header-preload-delay-onload>;rel=preload;as=script
Link: </preload/resources/dummy.css?link-header-preload-delay-onload>;rel=preload;as=style
Link: </preload/resources/square.png?link-header-preload-delay-onload>;rel=preload;as=image