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chromium/third_party/blink/web_tests/external/wpt/webaudio/historical.html 

<!doctype html>
<title>Historical Web Audio API features</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
[
  "webkitAudioContext",
  "webkitAudioPannerNode",
  "webkitOfflineAudioContext",
].forEach(name => {
  test(function() {
    assert_false(name in window);
  }, name + " interface should not exist");
});

[
  "dopplerFactor",
  "speedOfSound",
  "setVelocity"
].forEach(name => {
  test(function() {
    assert_false(name in AudioListener.prototype);
  }, name + " member should not exist on the AudioListener.");
});

test(function() {
  assert_false("setVelocity" in PannerNode.prototype);
}, "setVelocity should not exist on PannerNodes.");
</script>