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-rw-r--r--layout/generic/test/test_frame_visibility_in_iframe.html28
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diff --git a/layout/generic/test/test_frame_visibility_in_iframe.html b/layout/generic/test/test_frame_visibility_in_iframe.html
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+++ b/layout/generic/test/test_frame_visibility_in_iframe.html
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+<!DOCTYPE HTML>
+<html>
+<head>
+<meta charset="utf-8">
+<script src="/tests/SimpleTest/SimpleTest.js"></script>
+<link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+<script>
+SimpleTest.waitForExplicitFinish();
+SpecialPowers.pushPrefEnv(
+ {
+ // Set layout.visibility.min-recompute-interval-ms to 0ms so that
+ // ScheduleApproximateFrameVisibilityUpdateNow gets called on every frame
+ // we flush layout.
+ set: [ ["layout.visibility.min-recompute-interval-ms", 0] ],
+ },
+ () =>
+ {
+ window.open("frame_visibility_in_iframe.html", "_blank");
+ }
+);
+</script>
+</body>
+</html>