Bug 1335986 - Run test_restyles.html on Android. r=birtles

Now test_restyles.html runs in content window, so theoretically we no longer
receive unexpected animation restyles in chrome window.

MozReview-Commit-ID: GJq6WTdEBy8

--HG--
extra : rebase_source : cfdbf0b6c709d6a24d6d038ec71f664ccf745317

dom/animation/test/mochitest.ini

@@ -114,7 +114,6 @@ support-files =
 [mozilla/test_hide_and_show.html]
 [mozilla/test_moz-prefixed-properties.html]
 [mozilla/test_restyles.html]
-skip-if = os == 'android' # bug 1335986
 [mozilla/test_restyling_xhr_doc.html]
 [mozilla/test_set-easing.html]
 [mozilla/test_transform_limits.html]