Backed out 2 changesets (bug 1580567, bug 1599927) for mochitest failures at test_interfaces.html. CLOSED TREE

Backed out changeset 0e0d88942d33 (bug 1599927)
Backed out changeset 522c8d183bd5 (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