Codebase Browser
chromium
Go to App

chromium/third_party/blink/web_tests/virtual/fluent-non-overlay-scrollbar/composited/basic-scrollbar.html 

<!doctype html>
<!-- The basic appearance of composited Fluent non-overlay scrollbar. The root
     scroller is always composited, and the fixed sub-scroller covers the
     left-side scrollbar case. -->
<meta charset="utf-8">
<meta name="fuzzy" content="0-10;0-10">
<style>
  body {
    background-color: green;
    height: 2000px;
    width: 2000px;
  }

  .scrollable {
    direction: rtl;
    height: 200px;
    overflow: scroll;
    position: fixed;
    width: 200px;
  }

  .content {
    background-color: lightgreen;
    height: 400px;
    width: 400px;
  }
</style>
<div class="scrollable">
  <div class="content"></div>
</div>