Update dom_perf expectations for mac 10.6

tools/perf_expectations/perf_expectations.json

 {"chromium-rel-win7-dual/dhtml/times/t": {"reva": 158193, "revb": 158364, "improve": -1339, "regress": 1295, "sha1": "9c4c56bf"},
  "chromium-rel-win7-dual/dom_perf/Total/score": {"reva": 168485, "revb": 170452, "improve": 298, "regress": 43, "sha1": "85f95688"},
  "chromium-rel-win7-dual/intl1/times/t": {"reva": 185548, "revb": 185596, "improve": 405.122222228, "regress": 526.516666662, "sha1": "1c61f39b"},
  "chromium-rel-win7-dual/intl2/times/t": {"reva": 185548, "revb": 185596, "improve": 187.677777782, "regress": 383.716666672, "sha1": "bae7001e"},
  "chromium-rel-win7-dual/morejs/times/t": {"reva": 192392, "revb": 192823, "improve": -91.1166666669, "regress": 31.0333333328, "sha1": "addaac0b"},
  "chromium-rel-win7-dual/moz/times/t": {"reva": 190960, "revb": 192049, "improve": -248.150000007, "regress": 1063.76666667, "sha1": "758e1076"},
  "chromium-rel-win7-dual/startup/warm/t": {"reva": 171937, "revb": 173622, "improve": 0.3499999994, "regress": 25.5315789477, "sha1": "c903d95b"},
  "chromium-rel-win7-dual/v8_benchmark/score/score": {"reva": 158193, "revb": 158364, "improve": 485, "regress": -615, "sha1": "21a861ff"},
  "linux-release-64/sizes/chrome-bss/bss": {"reva": 183140, "revb": 183249, "type": "absolute", "better": "lower", "improve": 431241, "regress": 476635, "sha1": "c120b457"},
  "linux-release-64/sizes/chrome-data/data": {"reva": 189000, "revb": 189792, "type": "absolute", "better": "lower", "improve": 3420577, "regress": 3870216, "sha1": "d8ac9f82"},
@@ skipping 399 matching lines @@
  "linux-release/sizes/nacl_helper-textrel/textrel": {"reva": 117081, "revb": 117299, "type": "absolute", "better": "lower", "improve": 0, "regress": 0, "sha1": "309d1763"},
  "linux-release/sizes/nacl_helper/nacl_helper": {"reva": 193069, "revb": 193093, "type": "absolute", "better": "lower", "improve": 1271822, "regress": 1405700, "sha1": "b0c60326"},
  "linux-release/sizes/nacl_helper_bootstrap-bss/bss": {"reva": 114822, "revb": 115019, "type": "absolute", "better": "lower", "improve": 1019980807, "regress": 1127347209, "sha1": "a4ff54ab"},
  "linux-release/sizes/nacl_helper_bootstrap-data/data": {"reva": 114822, "revb": 115019, "type": "absolute", "better": "lower", "improve": 19, "regress": 21, "sha1": "6a3e92f4"},
  "linux-release/sizes/nacl_helper_bootstrap-si/initializers": {"reva": 114822, "revb": 115019, "type": "absolute", "better": "lower", "improve": 0, "regress": 0, "sha1": "dd908f29"},
  "linux-release/sizes/nacl_helper_bootstrap-text/text": {"reva": 150377, "revb": 150377, "type": "absolute", "better": "lower", "improve": 4596, "regress": 5080, "sha1": "4bb41c07"},
  "linux-release/sizes/nacl_helper_bootstrap/nacl_helper_bootstrap": {"reva": 114822, "revb": 115019, "type": "absolute", "better": "lower", "improve": 8776, "regress": 9700, "sha1": "3f284fed"},
  "linux-release/sizes/totals-textrel/textrel": {"reva": 193069, "revb": 193093, "type": "absolute", "better": "lower", "improve": 1348, "regress": 1490, "sha1": "42de1971"},
  "linux-release/startup/warm/t": {"improve": -15, "regress": 15, "sha1": "9e17e65d"},
  "mac-release-10.6/dhtml/times/t": {"reva": 189236, "revb": 189376, "improve": 47.3944444455, "regress": 125.650000004, "sha1": "398e0a73"},
- "mac-release-10.6/dom_perf/Total/score": {"reva": 169426, "revb": 169978, "improve": 223, "regress": 134, "sha1": "7b808d4d"},
+ "mac-release-10.6/dom_perf/Total/score": {"reva": 194986, "revb": 195224, "improve": 298, "regress": 197, "sha1": "2bfb2d68"},
  "mac-release-10.6/intl1/times/t": {"reva": 182931, "revb": 183271, "improve": 281.094444446, "regress": 1613.03333334, "sha1": "a9de6d0b"},
  "mac-release-10.6/intl2/times/t": {"reva": 165939, "revb": 166315, "improve": -4756, "regress": -2807, "sha1": "a82df4d4"},
  "mac-release-10.6/morejs/times/t": {"reva": 67956, "revb": 69048, "improve": -2546, "regress": 2597, "sha1": "f8cbaca1"},
  "mac-release-10.6/moz/times/t": {"reva": 68096, "revb": 69048, "improve": -3314, "regress": 2668, "sha1": "fe58113c"},
  "mac-release-10.6/startup/warm/t": {"reva": 188327, "revb": 189388, "improve": -52.5967105262, "regress": 96.9232894739, "sha1": "ab8331ad"},
  "mac-release-10.6/v8_benchmark/score/score": {"reva": 149403, "revb": 149635, "improve": 11, "regress": -502, "sha1": "93b5c561"},
  "mac-release/sizes/Chromium.app/Chromium.app": {"reva": 193069, "revb": 193380, "type": "absolute", "better": "lower", "improve": 107074150, "regress": 118383821, "sha1": "d4258780"},
  "mac-release/sizes/Chromium/Chromium": {"reva": 165473, "revb": 165473, "type": "absolute", "better": "lower", "improve": 8132, "regress": 8988, "sha1": "8e448691"},
  "mac-release/sizes/ChromiumFramework/ChromiumFramework": {"reva": 194289, "revb": 194289, "type": "absolute", "better": "lower", "improve": 73171356, "regress": 80873604, "sha1": "d64807cc"},
  "mac-release/sizes/chrome-si/initializers": {"reva": 148915, "revb": 148915, "type": "absolute", "better": "lower", "improve": 13, "regress": 13, "tolerance": 0, "sha1": "824a7c28"},
@@ skipping 364 matching lines @@
  "xp-release-single-core/morejs/times/t": {"reva": 188950, "revb": 189338, "improve": -271.366666668, "regress": 164.733333337, "sha1": "0e29e6dd"},
  "xp-release-single-core/moz/times/t": {"reva": 188923, "revb": 189304, "improve": -234.033333334, "regress": 390.833333331, "sha1": "4e650fbe"},
  "xp-release-single-core/startup/warm/t": {"improve": -9, "regress": 9, "sha1": "fa876192"},
  "xp-release/sizes/chrome.dll/chrome.dll": {"reva": 194029, "revb": 194173, "type": "absolute", "improve": 53243289, "regress": 58885479, "sha1": "1cd3ce17"},
  "xp-release/sizes/chrome.exe/chrome.exe": {"reva": 183841, "revb": 184954, "type": "absolute", "better": "lower", "improve": 720358, "regress": 796186, "sha1": "b5aa4523"},
  "xp-release/sizes/mini_installer.exe/mini_installer.exe": {"reva": 183841, "revb": 184954, "type": "absolute", "better": "lower", "improve": 26480102, "regress": 29465319, "sha1": "7d9a453f"},
  "xp-release/sizes/npchrome_frame.dll/npchrome_frame.dll": {"reva": 193841, "revb": 194394, "type": "absolute", "better": "lower", "improve": 3030272, "regress": 3349786, "sha1": "efd5ccfa"},
  "xp-release/sizes/setup.exe/setup.exe": {"reva": 183841, "revb": 184954, "type": "absolute", "better": "lower", "improve": 1080780, "regress": 1195085, "sha1": "c56e884e"},
  "load": true
 }