Tools/TestWebKitAPI/Tests/WebKit2/link-with-download-attribute.html - third_party/webkit - Git at Google

 <html>
     <body>
         <a id="testAnchor" style="display: block; height: 100%; width: 100%" download="downloadAttributeValue.txt"></a>
         <script>
             var blob = new Blob(["Hello world!"], {type: "application/octet-stream"});
             var link = document.getElementById("testAnchor");
             link.href = window.URL.createObjectURL(blob);
         </script>
     </body>
 </html>
	<html>
	<body>
	<a id="testAnchor" style="display: block; height: 100%; width: 100%" download="downloadAttributeValue.txt"></a>
	<script>
	var blob = new Blob(["Hello world!"], {type: "application/octet-stream"});
	var link = document.getElementById("testAnchor");
	link.href = window.URL.createObjectURL(blob);
	</script>
	</body>
	</html>