Add blank line at end of file so that deleting it works on the try server

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@148885 0039d316-1c4b-4281-b951-d872f2087c98

chrome/test/data/content-sniffer-test3.html

@@ -13,4 +13,4 @@ document.body.appendChild(iframe);
 </script>
 <pre>Do NOT download!!</pre>
 </body>
-</html>
+</html>
\ No newline at end of file