| Index: LayoutTests/fast/dom/partial-layout-non-overlay-scrollbars.html | 
| diff --git a/LayoutTests/fast/dom/partial-layout-non-overlay-scrollbars.html b/LayoutTests/fast/dom/partial-layout-non-overlay-scrollbars.html | 
| new file mode 100644 | 
| index 0000000000000000000000000000000000000000..938123a426bde8f902e0aa69b4526dddfe208717 | 
| --- /dev/null | 
| +++ b/LayoutTests/fast/dom/partial-layout-non-overlay-scrollbars.html | 
| @@ -0,0 +1,47 @@ | 
| +<!DOCTYPE HTML> | 
| +<html> | 
| +<script src="../../resources/testharness.js"></script> | 
| +<script src="../../resources/testharnessreport.js"></script> | 
| +<link rel="stylesheet" href="../../resources/testharness.css"> | 
| +<head> | 
| +<style> | 
| +::-webkit-scrollbar { | 
| +    -webkit-appearance: none; | 
| +    width: 8px; | 
| +} | 
| + | 
| +* { | 
| +    margin: 0; | 
| +    padding: 0; | 
| +} | 
| + | 
| +#makespace { | 
| +    height: 5000px; | 
| +} | 
| +</style> | 
| +</head> | 
| +<body> | 
| +<div id="makespace"></div> | 
| +<div id="measure"></div> | 
| +<script> | 
| +    if (window.testRunner) | 
| +        testRunner.dumpAsText(); | 
| + | 
| +    if (window.internals) | 
| +        window.internals.setUsesOverlayScrollbars(true); // Note: We force non-overlay scrollbars with CSS. | 
| + | 
| +    var test = async_test("Test that partial layout works with non-overlay scrollbars."); | 
| +    setTimeout(function() { | 
| +        test.step(function() { | 
| +            var measure = document.getElementById('measure'); | 
| +            var measureWidth = measure.offsetWidth; // Partial layout occurs here! | 
| + | 
| +            assert_equals(measureWidth, document.body.offsetWidth); | 
| +            assert_equals(measureWidth, window.innerWidth - 8); | 
| +        }); | 
| + | 
| +        test.done(); | 
| +    }, 0); | 
| +</script> | 
| +</body> | 
| +</html> | 
|  |