This changeset reverts some or all edits made in changesets 172966100, 172991745, 172994872, 172995552, 173052024, 173052164, 173056744, 173057048, 173057616, 173080006, 173080443, 173081440, 173081850, 173082086, 173082617, 173085621, 173086607, 173093026, 173097934.