third_party/WebKit/LayoutTests/fast/repaint/multicol-with-overflowing-block-rl-expected.html - chromium/src - Git at Google

 <!DOCTYPE html>
 <div id="container" style="-webkit-columns:3; -webkit-column-gap:0; column-fill:auto; width:500px; height:500px; -webkit-writing-mode:vertical-rl;">
     <div style="width:100px;">
         <div id="elm" style="width:1500px; background:green;"></div>
     </div>
 </div>
 <p>Test changing the background color of a big block that overflows the flow thread.</p>
 <p>A green square should be seen above (if tested manually, you need to click first).</p>
	<!DOCTYPE html>
	<div id="container" style="-webkit-columns:3; -webkit-column-gap:0; column-fill:auto; width:500px; height:500px; -webkit-writing-mode:vertical-rl;">
	<div style="width:100px;">
	<div id="elm" style="width:1500px; background:green;"></div>
	</div>
	</div>
	<p>Test changing the background color of a big block that overflows the flow thread.</p>
	<p>A green square should be seen above (if tested manually, you need to click first).</p>