chromium/third_party/blink/web_tests/fast/forms/text/text-inner-overflow.html

<!DOCTYPE>
<div style="overflow-y:auto; width:50%; border:1px solid black;">
<div>foo</div>
<!-- The INPUT box is smaller than the font-size. The inner-editor element
     should not affect overflow and should not make a scrollbar of the
     outer DIV. crbug.com/579835 -->
<input style="width:10px; height:0;">
</div>