Auto merge of #21895 - Manishearth:gst-mac, r=jdm

Revert "Disable event_timeupdate_noautoplay test on mac"

Hopefully the builders now have the right gstreamer things.

From #21543 , needs servo/saltfs#898

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tests/wpt/metadata/html/semantics/embedded-content/media-elements/event_timeupdate_noautoplay.html.ini

@@ -1,7 +1,5 @@
 [event_timeupdate_noautoplay.html]
   type: testharness
-  disabled:
-    if os == "mac": https://github.com/servo/saltfs/pull/898
   expected: TIMEOUT
   [calling play() on a sufficiently long audio should trigger timeupdate event]
     expected: NOTRUN