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-rw-r--r--layout/reftests/async-scrolling/fixed-pos-scrolled-clip-2.html59
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diff --git a/layout/reftests/async-scrolling/fixed-pos-scrolled-clip-2.html b/layout/reftests/async-scrolling/fixed-pos-scrolled-clip-2.html
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+++ b/layout/reftests/async-scrolling/fixed-pos-scrolled-clip-2.html
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+<!DOCTYPE html>
+<html reftest-async-scroll
+ reftest-displayport-x="0" reftest-displayport-y="0"
+ reftest-displayport-w="800" reftest-displayport-h="2000"
+ reftest-async-scroll-x="0" reftest-async-scroll-y="50">
+
+<title>position:fixed should not be clipped by the subframe clip, but it should be clipped by the "clip" clip, and the "clip" clip should be moved by the subframe.</title>
+
+<style>
+
+body {
+ margin: 0;
+ height: 4000px;
+}
+
+.subframe {
+ margin-top: 300px;
+ width: 400px;
+ height: 400px;
+ overflow: auto;
+}
+
+.subframeScrolled {
+ height: 800px;
+ position: relative;
+}
+
+.absoluteClip {
+ position: absolute;
+ top: 0px;
+ left: 100px;
+ width: 200px;
+ height: 200px;
+ background: red;
+ clip: rect(auto auto auto auto);
+}
+
+.fixed {
+ position: fixed;
+ top: 0;
+ right: 0;
+ bottom: 0;
+ left: 0;
+ background: linear-gradient(lime, lime) black 0 100px no-repeat;
+ background-size: 100% 200px;
+}
+
+</style>
+
+<div class="subframe"
+ reftest-displayport-x="0" reftest-displayport-y="0"
+ reftest-displayport-w="400" reftest-displayport-h="800"
+ reftest-async-scroll-x="0" reftest-async-scroll-y="150">
+ <div class="subframeScrolled">
+ <div class="absoluteClip">
+ <div class="fixed"></div>
+ </div>
+ </div>
+</div>