chromium/third_party/blink/manual_tests/plugins/windowed-in-iframe.html

<html xmlns="http://www.w3.org/1999/xhtml">

<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Flash In IFrame Test File</title>
</head>

<body>

    <b> This manual tests verifies that when a plugin is loaded as the src of an iframe
        and that iframe is outside of the viewport of the page, the plugin does not appear
        in the upper left of the frame. When this page loads you should not see the Flash movie.
        It should be shown only after you scroll to the bottom of the page. This was a problem for
        GTK+ in <a href="https://bugs.webkit.org/show_bug.cgi?id=37769">bug 37769</a></b> <br/><br/>
    <div style="height:2000px;">&nbsp;</div>

    <iframe width="600" height="368" src="test.swf" frameborder="0" allowfullscreen></iframe>
<br clear="all">
</body>

</html>