Backed out 2 changesets (bug 1580567, bug 1599927) for causing permafailures in dom/tests/mochitest/general/test_interfaces.html CLOSED TREE

Backed out changeset aeceec922866 (bug 1599927)
Backed out changeset 29809135f18e (bug 1580567)

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rename : browser/components/privatebrowsing/test/browser/browser_privatebrowsing_rememberprompt.js => browser/components/privatebrowsing/test/browser/browser_privatebrowsing_geoprompt.js