<!DOCTYPE html>
<script>
if (window.testRunner) {
testRunner.zoomPageIn();
testRunner.zoomPageIn();
}
</script>
<style>
body {
background: green;
}
</style>
<p>
This page should have 144% full page zoom, hence the viewport width should
be 800 / 1.44 = 555.6px, which is less than 700 so the background should
go green.
</p>