Bug 1213631 - disable browser_pluginscroll.js for a jaw-dropping failure rate

--HG--
extra : rebase_source : fc3e974b2eb0d0f52952811d0271938567ec1e8a

dom/plugins/test/mochitest/browser.ini

@@ -12,4 +12,4 @@ skip-if = (!e10s || os != "win")
 [browser_tabswitchbetweenplugins.js]
 skip-if = (!e10s || os != "win")
 [browser_pluginscroll.js]
-skip-if = (!e10s || os != "win")
+skip-if = (true || !e10s || os != "win") # Bug 1213631