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diff --git a/layout/reftests/invalidation/masklayer-2.html b/layout/reftests/invalidation/masklayer-2.html
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+<!DOCTYPE html>
+<html lang="en" reftest-async-scroll>
+<meta charset="utf-8">
+<title>Moving a layer in a box with a rounded clip shouldn't invalidate.</title>
+
+<style>
+
+#scrollbox {
+ position: absolute;
+ top: 50px;
+ left: 50px;
+ width: 300px;
+ height: 200px;
+ background-color: #DDD;
+ overflow: auto;
+ border-radius: 10px;
+}
+
+#scrollable {
+ width: 600px;
+}
+
+#scrolledLayer {
+ margin-top: 50px;
+ margin-left: 100px;
+ box-model: border-box;
+ border: 1px solid lime;
+ width: 100px;
+ height: 100px;
+}
+
+</style>
+
+<body>
+
+<div id="scrollbox" reftest-displayport-x="0"
+ reftest-displayport-y="0"
+ reftest-displayport-w="300"
+ reftest-displayport-h="200">
+ <div id="scrollable">
+ <div id="scrolledLayer" class="reftest-no-paint"></div>
+ </div>
+</div>
+
+<script>
+
+var scrollbox = document.getElementById("scrollbox");
+
+function doTest() {
+ scrollbox.scrollLeft = 0;
+ document.documentElement.removeAttribute("class");
+}
+
+// Make #scrollbox have active scrolling
+scrollbox.scrollLeft = 60;
+scrollbox.offsetLeft;
+scrollbox.scrollLeft = 40;
+scrollbox.offsetLeft;
+
+document.addEventListener("MozReftestInvalidate", doTest);
+
+</script>