This changeset reverts changesets 157914501,157915445,157915948,157946746,157946837,157947292,157953173,157954037,157954443,157994600,157995243,158003220,158003756,158038895,158295351,158347204,158347304,158362056,158362405,158400852,158412642,158414952,158451333,158525749,158538619,158571286,158647930,159461775