Rebaseline a few PERF_IMPROVE.

tools/perf_expectations/perf_expectations.json

Index: tools/perf_expectations/perf_expectations.json
===================================================================
--- tools/perf_expectations/perf_expectations.json	(revision 111020)
+++ tools/perf_expectations/perf_expectations.json	(working copy)
@@ -23,7 +23,7 @@
  "linux-release-hardy/moz/times/t": {"reva": 99393, "revb": 100034, "improve": 38, "regress": 165, "sha1": "430fc571"},
  "linux-release-hardy/startup/warm/t": {"improve": -11, "regress": 93, "sha1": "e000c456"},
  "linux-release-hardy/v8_benchmark/score/score": {"reva": 70271, "revb": 70591, "improve": -3619, "regress": -4680, "sha1": "498da66a"},
- "linux-release-lowmem/bloat-http/times/t": {"reva": 109844, "revb": 109902, "improve": 1019, "regress": 1304, "sha1": "aadc26fc"},
+ "linux-release-lowmem/bloat-http/times/t": {"reva": 110284, "revb": 111009, "improve": 159, "regress": 436, "sha1": "f3b10325"},
  "linux-release-lowmem/database/delete-transactions/t": {"reva": 108964, "revb": 109902, "improve": -452, "regress": 984, "sha1": "3c757f05"},
  "linux-release-lowmem/database/insert-transactions/t": {"reva": 98857, "revb": 99968, "improve": -258, "regress": 925, "sha1": "3690944a"},
  "linux-release-lowmem/database/pseudo-random-transactions/t": {"reva": 109097, "revb": 109902, "improve": -253, "regress": 704, "sha1": "61ebb31b"},
@@ -41,9 +41,9 @@
  "linux-release-lowmem/sunspider/total/t": {"reva": 81217, "revb": 81884, "improve": -645, "regress": 722, "sha1": "35f98911"},
  "linux-release-lowmem/v8_benchmark/score/score": {"reva": 81069, "revb": 81884, "improve": 1196, "regress": -2933, "sha1": "9e618ede"},
  "linux-release/dhtml/times/t": {"reva": 109368, "revb": 109709, "improve": 1, "regress": 190, "sha1": "e5a6f44c"},
- "linux-release/dom_perf/Total/score": {"reva": 109368, "revb": 109371, "improve": -48, "regress": -89, "sha1": "df1065e6"},
+ "linux-release/dom_perf/Total/score": {"reva": 109360, "revb": 111012, "improve": -30, "regress": -103, "sha1": "2538b7cc"},
  "linux-release/dromaeo_jslib/jslib/score": {"reva": 90010, "revb": 104572, "improve": -146, "regress": -201, "sha1": "f9b75f63"},
- "linux-release/intl1/times/t": {"reva": 104868, "revb": 105328, "improve": 196, "regress": 558, "sha1": "b48b1979"},
+ "linux-release/intl1/times/t": {"reva": 110487, "revb": 111012, "improve": 139, "regress": 379, "sha1": "f29c6c22"},
  "linux-release/intl2/times/t": {"reva": 109815, "revb": 110120, "improve": 67, "regress": 198, "sha1": "056d8e1c"},
  "linux-release/morejs/times/t": {"reva": 109815, "revb": 110120, "improve": 398, "regress": 545, "sha1": "425696a1"},
  "linux-release/moz/times/t": {"reva": 99393, "revb": 100034, "improve": -40, "regress": 172, "sha1": "2cf4039f"},
@@ -104,15 +104,15 @@
  "xp-release-dual-core/morejs/times/t": {"reva": 110293, "revb": 110345, "improve": 89, "regress": 138, "sha1": "ab91db2a"},
  "xp-release-dual-core/moz/times/t": {"reva": 107830, "revb": 109711, "improve": 81, "regress": 176, "sha1": "73d87dab"},
  "xp-release-dual-core/moz/total_byte_b/IO_b": {"reva": 109376, "revb": 109471, "improve": 1046, "regress": 2965, "sha1": "0b75c6e0"},
- "xp-release-dual-core/moz/total_byte_r/IO_r": {"reva": 109371, "revb": 109381, "improve": 741, "regress": 848, "sha1": "8cbb3f0b"},
+ "xp-release-dual-core/moz/total_byte_r/IO_r": {"reva": 110284, "revb": 111006, "improve": 168, "regress": 486, "sha1": "46f9d553"},
  "xp-release-dual-core/moz/total_op_b/IO_op_b": {"reva": 104424, "revb": 104572, "improve": 6497, "regress": 125226, "sha1": "42471143"},
- "xp-release-dual-core/moz/total_op_r/IO_op_r": {"reva": 109757, "revb": 109902, "improve": 2297, "regress": 3752, "sha1": "2cd1ada7"},
+ "xp-release-dual-core/moz/total_op_r/IO_op_r": {"reva": 110284, "revb": 111006, "improve": 1678, "regress": 3057, "sha1": "a6f56b2b"},
  "xp-release-dual-core/moz/vm_peak_b/vm_pk_b": {"reva": 102636, "revb": 102660, "improve": 1910579, "regress": 5027636, "sha1": "974f5699"},
- "xp-release-dual-core/moz/vm_peak_r/vm_pk_r": {"reva": 109757, "revb": 109902, "improve": 6650060, "regress": 9152103, "sha1": "26db3518"},
+ "xp-release-dual-core/moz/vm_peak_r/vm_pk_r": {"reva": 110925, "revb": 111006, "improve": 5408768, "regress": 6782362, "sha1": "67972f7f"},
  "xp-release-dual-core/startup/warm/t": {"reva": 76825, "revb": 77094, "improve": -107, "regress": 141, "sha1": "e0dcf672"},
  "xp-release-dual-core/v8_benchmark/score/score": {"reva": 68696, "revb": 69071, "improve": 892, "regress": -668, "sha1": "75a383d3"},
  "xp-release-single-core/dhtml/times/t": {"reva": 98602, "revb": 99994, "improve": -2888, "regress": 3391, "sha1": "30683762"},
- "xp-release-single-core/intl1/times/t": {"reva": 110077, "revb": 110200, "improve": 1069, "regress": 1449, "sha1": "3643d263"},
+ "xp-release-single-core/intl1/times/t": {"reva": 110284, "revb": 110995, "improve": 339, "regress": 2882, "sha1": "ec68e459"},
  "xp-release-single-core/intl2/times/t": {"reva": 105307, "revb": 105734, "improve": 69, "regress": 1117, "sha1": "8aa60255"},
  "xp-release-single-core/morejs/times/t": {"reva": 104308, "revb": 104575, "improve": -32, "regress": 485, "sha1": "e63333ad"},
  "xp-release-single-core/moz/times/t": {"reva": 75758, "revb": 76221, "improve": -1705, "regress": 3304, "sha1": "b615a416"},