chromium/third_party/blink/web_tests/images/image-change-src.html

<!DOCTYPE html>
<head>
<script>
 function onload() { 
   document.getElementById("1").setAttribute("src", "");
   document.getElementById("2").removeAttribute("src");
   document.getElementById("3").setAttribute("src","resources/green.jpg");
 }
</script>
</head>
<body onLoad="onload()">
<span>Test to check for image update when source is changed/cleared</span><br>
<img id="3">
<img alt="1" id="1" src="resources/green.jpg">
<img alt="2" id="2" src="resources/green.jpg">
</body>
</html>