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diff --git a/dom/workers/test/test_navigator_workers_hardwareConcurrency.html b/dom/workers/test/test_navigator_workers_hardwareConcurrency.html
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+<!DOCTYPE HTML>
+<html>
+<head>
+ <meta charset="utf-8">
+ <title>Test for Navigator.hardwareConcurrency</title>
+ <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+ <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+ <script type="application/javascript">
+
+ SimpleTest.waitForExplicitFinish();
+ var script = "postMessage(navigator.hardwareConcurrency)";
+ var url = URL.createObjectURL(new Blob([script]));
+ var w = new Worker(url);
+ w.onmessage = function(e) {
+ var x = e.data;
+ is(typeof x, "number", "hardwareConcurrency should be a number.");
+ ok(x > 0, "hardwareConcurrency should be greater than 0.");
+ SimpleTest.finish();
+ }
+ </script>
+</head>
+<body>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+</pre>
+</body>
+</html>