Bug 894922 - Enable test case on windows. r=jwwang.

MozReview-Commit-ID: CaKry95yiPY

--HG--
extra : rebase_source : 8b114be0c54f7d21d7d84c5600cdbfbcfa0fcf54

dom/media/test/mochitest.ini

@@ -607,7 +607,7 @@ skip-if = true # bug 475110 - disabled since we don't play Wave files standalone
 [test_autoplay_contentEditable.html]
 [test_buffered.html]
 [test_bug448534.html]
-skip-if = buildapp == 'mulet' || os == 'win' # bug 894922
+skip-if = buildapp == 'mulet'
 [test_bug463162.xhtml]
 [test_bug465498.html]
 [test_bug495145.html]