This changeset reverts some or all edits made in changesets 170980008, 170980116, 170980194, 170980256, 170980301, 170980437, 170980571, 170980622, 170980668, 170980744, 170980770, 170980815, 170980868, 170980904, 170980934, 170980969, 170981010, 170981037, 170981165, 170981182, 170981242, 170981292, 170981321, 170981345, 170981425, 170981487, 170981515, 170981548, 170981567, 170981626, 170981642, 170981682, 170981721, 170981750, 170981759, 170981785, 170981801, 170981827, 170981855, 170981885, 170981915, 170981938, 170981959, 170981990, 170982014, 170982057, 170982081, 170982164, 170982204, 170982222, 170982250, 170982290, 170982320, 170982333, 170982366, 170982381, 170982424, 170982460, 170982496, 170982558, 170982586, 171012968.