Codebase Browser
chromium
Go to App

chromium/third_party/blink/web_tests/external/wpt/css/printing/zero-size-print-ref.html 

<!doctype html>
<title>Printing with default page size</title>
<style>
html { box-sizing: border-box; height: 100%; border: 2px solid black; }
</style>
<h1>Chapter 1. Loomings</h1>