| Index: LayoutTests/fast/dom/HTMLDialogElement/non-modal-dialog-scrolled-viewport-expected.html | 
| diff --git a/LayoutTests/fast/dom/HTMLDialogElement/non-modal-dialog-scrolled-viewport-expected.html b/LayoutTests/fast/dom/HTMLDialogElement/non-modal-dialog-scrolled-viewport-expected.html | 
| new file mode 100644 | 
| index 0000000000000000000000000000000000000000..ff9e620b106c254f7736de26846fcf22ced91400 | 
| --- /dev/null | 
| +++ b/LayoutTests/fast/dom/HTMLDialogElement/non-modal-dialog-scrolled-viewport-expected.html | 
| @@ -0,0 +1,31 @@ | 
| +<!DOCTYPE html> | 
| +<html> | 
| +<head> | 
| +<style> | 
| +.pseudodialog { | 
| +    position: absolute; | 
| +    left: 0; right: 0; | 
| +    margin: auto; | 
| +    border: solid; | 
| +    padding: 1em; | 
| +    background: white; | 
| +    color: black; | 
| +} | 
| +</style> | 
| +</head> | 
| +<body style="height: 10000px; width: 10000px"> | 
| +<p style="position: fixed"> | 
| +This tests that a dialog's containing block is the initial containing block. | 
| +The dialog is positioned at (1200, 1200) and the window is scrolled to (1000, | 
| +1000) so the dialog should be positioned at (200, 200) relative to the viewport. | 
| +</p> | 
| +<div class="pseudodialog" style="top: 1200px; left: 1200px; right: auto; height: 250px; width: 50%; background-color: yellow"> | 
| +    This dialog should be onscreen with a width of 50% of the viewport. It is the child of an narrow element | 
| +    positioned off screen, but its containing block is the initial containing block, so its | 
| +    position and percent lengths are relative to that. | 
| +</div> | 
| +<script> | 
| +window.scroll(1000, 1000); | 
| +</script> | 
| +</body> | 
| +</html> | 
|  |