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diff --git a/layout/reftests/invalidation/negative-w-component.html b/layout/reftests/invalidation/negative-w-component.html
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+<!DOCTYPE html>
+<html lang="en" class="reftest-wait">
+<meta charset="utf-8">
+<title>Change a layer's transform making negative w component.</title>
+
+<style>
+
+body {
+ background-color: white;
+ overflow: hidden;
+}
+
+#outer {
+ perspective: 500px;
+ perspective-origin: 350px 250px;
+ width: 700px;
+ height: 500px;
+ display: block;
+ top: 10px;
+ left: 10px;
+ position: absolute;
+ overflow: visible;
+}
+
+#container1 {
+ transform-style: preserve-3d;
+ transform: translateX(-50px) translateZ(350px) rotateY(-90deg);
+}
+
+#container2 {
+ transform-style: preserve-3d;
+ transform: translateY(-200px) translateX(50px) translateZ(350px) rotateY(90deg);
+}
+
+#scale {
+ transform-style: preserve-3d;
+}
+
+.negw {
+ transform: translateZ(1px);
+}
+
+.posw {
+ transform: translateZ(-500px);;
+}
+
+#dummy {
+ transform-style: preserve-3d;
+ transform: translateY(150px);
+}
+
+#square1, #square2 {
+ background-color: red;
+ width: 700px;
+ height: 200px;
+}
+
+</style>
+
+<body>
+
+<div id="outer">
+ <div id="scale" class="negw">
+ <div id="dummy">
+ <div id="container1">
+ <div id="square1"></div>
+ </div>
+ <div id="container2">
+ <div id="square2"></div>
+ </div>
+ </div>
+ </div>
+</div>
+
+<script>
+
+var scale = document.getElementById("scale");
+
+function doTest() {
+ scale.className = "posw";
+ document.documentElement.removeAttribute("class");
+}
+
+document.addEventListener("MozReftestInvalidate", doTest);
+
+</script>