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chromium/third_party/blink/web_tests/external/wpt/mediasession/setcameraactive.html 

<!DOCTYPE html>
<title>MediaSession.setCameraActive</title>
<script src=/resources/testharness.js></script>
<script src="/resources/testharnessreport.js"></script>
<script>

test(function(t) {
  window.navigator.mediaSession.setCameraActive(true);
  window.navigator.mediaSession.setCameraActive(false);
}, "Test that setCameraActive() can be executed for boolean values");

</script>