LayoutTests/printing/resources/iframe-subframe-vertical-rl.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html style="-webkit-writing-mode:vertical-rl">
 <body>
 You should see this text when printed.
 <br>
 Vertical text on the right.
 <br>
 <iframe src="./iframe-subframe.html" frameborder="1" width="200"></iframe>
 </body>
 </html>
	<!DOCTYPE html>
	<html style="-webkit-writing-mode:vertical-rl">
	<body>
	You should see this text when printed.
	<br>
	Vertical text on the right.
	<br>
	<iframe src="./iframe-subframe.html" frameborder="1" width="200"></iframe>
	</body>
	</html>