chromium/src/third_party/blink/web_tests/compositing/squashing/vertical-writing-mode-squashed.html - manifest_repos/chromium_src - Git at Google

 <!DOCTYPE html>
 <div style="writing-mode: vertical-rl; width: 400px; height: 400px; overflow-x: auto; backface-visibility: hidden">
   <div  style="position: relative" id="grandparent">
     Some text
     <div id="parent">
       <a id="child" style="position: relative">This text should not overlap the other text</a>

     </div>
   </div>
   <div style="width: 10000px; height:200px; background: yellow"></div>
 </div>
	<!DOCTYPE html>
	<div style="writing-mode: vertical-rl; width: 400px; height: 400px; overflow-x: auto; backface-visibility: hidden">
	<div style="position: relative" id="grandparent">
	Some text
	<div id="parent">
	<a id="child" style="position: relative">This text should not overlap the other text</a>

	</div>
	</div>
	<div style="width: 10000px; height:200px; background: yellow"></div>
	</div>