This changeset reverts some or all edits made in changesets 151955620, 152026137, 152075801, 152075802, 152075803, 152075804, 152075805, 152075807, 152075852, 152075856, 152075859, 152075865, 152075868, 152076299, 152076318, 152076321, 152076459, 152161152, 152161591, 152161731, 152166839, 152166874, 152172897, 152172900, 152172904, 152172914, 152172916, 152173026, 152173032, 152173106, 152173108, 152173111, 152173123, 152173128, 152173130, 152183986, 152183989, 152184025, 152184029, 152191600, 152194263, 152204434, 152215065, 152215077, 152215078, 152215093, 152215096, 152215128, 152215129, 152215130, 152215131, 152215146, 152215147, 152215160, 152215161, 152215173, 152215220, 152240390, 152253095.