third_party/WebKit/LayoutTests/svg/custom/duplicate-ids.html - chromium/src - Git at Google

 <!DOCTYPE html>
 <svg>
   <linearGradient id="f">
     <stop stop-color="green"/>
   </linearGradient>
   <linearGradient id="f">
     <stop stop-color="red"/>
   </linearGradient>
   <rect width="100" height="100" fill="url(#f) orange"/>
 </svg>
	<!DOCTYPE html>
	<svg>
	<linearGradient id="f">
	<stop stop-color="green"/>
	</linearGradient>
	<linearGradient id="f">
	<stop stop-color="red"/>
	</linearGradient>
	<rect width="100" height="100" fill="url(#f) orange"/>
	</svg>