<!doctype html>
<title>Test iframe with 100% height content in printing</title>
<!-- We page zoom scale down the page by 1.25 when printing. -->
<body style="margin:0; zoom: 80%; height:400px">
  <iframe frameborder="0" style="box-sizing: border-box; height: 150px; width: 300px; border: 10px solid blue;"></iframe>