LayoutTests/fast/media/media-query-keyframes-resolution-count.html

<style>
body { background-color: green }

@media (min-width:10000px) {
    body { background-color: red }

    @keyframes fade {
        0% { opacity: 0; }
        100% { opacity: 1; }
    }
}

@media (min-width:10000px) {
    body { background-color: blue }
}
</style>
Resolving media queries should not require more than 1 style resolution.
<pre id=log></pre>
<script>

async function test() {
    if (!window.internals)
        return;
    testRunner.dumpAsText();
    testRunner.waitUntilDone();

    internals.startTrackingStyleRecalcs();

    await new Promise(requestAnimationFrame);

    log.textContent = `Style resolution count: ${ internals.styleRecalcCount() }`;

    testRunner.notifyDone();
}
test();
</script>