Bug 1148354 - Add a web platform test to test for the non existence of removed methods. r=karlt

MozReview-Commit-ID: 6DoZQJN8JRA

--HG--
extra : rebase_source : a49a665c5cd2873048943f68281f1c93af25a127

testing/web-platform/tests/webaudio/historical.html

@@ -12,4 +12,18 @@
     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>