Bug 1221500 - followup: re-enable inadvertently-disabled-test, rs=green try

https://treeherder.mozilla.org/#/jobs?repo=try&revision=5aa4d4df6383

--HG--
extra : commitid : BbH691kPhC3
extra : rebase_source : a1cb16735b599c5ab6bda4f7527e86ffb3d3342c

browser/components/tabview/test/browser.ini

@@ -104,7 +104,6 @@ skip-if = e10s # Bug 1086190
 skip-if = buildapp == 'mulet'
 [browser_tabview_bug627736.js]
 [browser_tabview_bug628061.js]
-skip-if = true
 [browser_tabview_bug628165.js]
 [browser_tabview_bug628270.js]
 [browser_tabview_bug628887.js]