Update the perf expectations for mac-release/sizes/chrome-si/initializers after the protobuf roll.

tools/perf_expectations/perf_expectations.json

 {"linux-release-64/sizes/chrome-bss/bss": {"reva": 216421, "revb": 216430, "type": "absolute", "better": "lower", "improve": 523892, "regress": 579040, "sha1": "0b0195e2"},
  "linux-release-64/sizes/chrome-data/data": {"reva": 203454, "revb": 203474, "type": "absolute", "better": "lower", "improve": 3570183, "regress": 3946094, "sha1": "b0d5e0fc"},
  "linux-release-64/sizes/chrome-si/initializers": {"reva": 216959, "revb": 216961, "type": "absolute", "better": "lower", "improve": 33, "regress": 33, "tolerance": 0, "sha1": "ebd8c26b"},
  "linux-release-64/sizes/chrome-text/text": {"reva": 203454, "revb": 203474, "type": "absolute", "better": "lower", "improve": 94012670, "regress": 103908994, "sha1": "a8dc15a3"},
  "linux-release-64/sizes/chrome.pak/chrome.pak": {"reva": 214295, "revb": 214296, "type": "absolute", "better": "lower", "improve": 4578193, "regress": 5060109, "sha1": "0785f1c1"},
  "linux-release-64/sizes/chrome/chrome": {"reva": 203454, "revb": 203474, "type": "absolute", "better": "lower", "improve": 128793270, "regress": 142351155, "sha1": "193926f5"},
  "linux-release-64/sizes/nacl_helper-bss/bss": {"reva": 193069, "revb": 193093, "type": "absolute", "better": "lower", "improve": 200024, "regress": 221080, "sha1": "5dfae63b"},
  "linux-release-64/sizes/nacl_helper-data/data": {"reva": 195191, "revb": 203172, "type": "absolute", "better": "lower", "improve": 22942, "regress": 26878, "sha1": "6d52a881"},
  "linux-release-64/sizes/nacl_helper-si/initializers": {"reva": 187981, "revb": 188124, "type": "absolute", "better": "lower", "improve": 14, "regress": 16, "sha1": "747e9d1f"},
  "linux-release-64/sizes/nacl_helper-text/text": {"reva": 202278, "revb": 202303, "type": "absolute", "better": "lower", "improve": 1801689, "regress": 1991341, "sha1": "73c0c6cd"},
@@ skipping 368 matching lines @@
  "linux-release/sizes/nacl_helper/nacl_helper": {"reva": 207276, "revb": 207476, "type": "absolute", "better": "lower", "improve": 1403834, "regress": 1556620, "sha1": "a30b27e9"},
  "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": 205083, "revb": 206071, "type": "absolute", "better": "lower", "improve": 1075, "regress": 1189, "sha1": "69d07fda"},
  "mac-release/sizes/Chromium.app/Chromium.app": {"reva": 203454, "revb": 203474, "type": "absolute", "better": "lower", "improve": 109237657, "regress": 120740660, "sha1": "4befe31e"},
  "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": 203454, "revb": 203474, "type": "absolute", "better": "lower", "improve": 75475151, "regress": 83424206, "sha1": "52a77a86"},
- "mac-release/sizes/chrome-si/initializers": {"reva": 208003, "revb": 208135, "type": "absolute", "better": "lower", "improve": 14, "regress": 14, "tolerance": 0, "sha1": "73e3770d"},
+ "mac-release/sizes/chrome-si/initializers": {"reva": 216955, "revb": 216962, "type": "absolute", "better": "lower", "improve": 13, "regress": 13, "tolerance": 0, "sha1": "c937ef20"},
  "win-release/media_tests_av_perf/audio_latency/latency": {"reva": 199840, "revb": 201303, "type": "absolute", "better": "lower", "improve": 57, "regress": 69, "sha1": "169d47dd"},
  "win-release/media_tests_av_perf/audio_latency/latency_bg_clip": {"reva": 199840, "revb": 201303, "type": "absolute", "better": "lower", "improve": 66, "regress": 78, "sha1": "708a71af"},
  "win-release/media_tests_av_perf/audio_pesq/actual": {"reva": 163215, "revb": 163382, "type": "absolute", "better": "higher", "improve": 4, "regress": 3, "sha1": "c8beccf7"},
  "win-release/media_tests_av_perf/audio_pesq/ref": {"reva": 163215, "revb": 163382, "type": "absolute", "better": "higher", "improve": 4, "regress": 3, "sha1": "b17c1404"},
  "win-release/media_tests_av_perf/cpu/crowd1080.webm": {"reva": 155313, "revb": 155418, "type": "absolute", "better": "lower", "improve": 0, "regress": 76, "sha1": "e656c991"},
  "win-release/media_tests_av_perf/cpu/crowd2160.webm": {"reva": 176330, "revb": 176978, "type": "absolute", "better": "lower", "improve": 0, "regress": 53, "sha1": "16fa69d2"},
  "win-release/media_tests_av_perf/cpu/crowd360.webm": {"reva": 155313, "revb": 155418, "type": "absolute", "better": "lower", "improve": 0, "regress": 0, "sha1": "2fff4dde"},
  "win-release/media_tests_av_perf/cpu/crowd480.webm": {"reva": 187207, "revb": 189345, "type": "absolute", "better": "lower", "improve": 0.0, "regress": 34.965, "sha1": "e6190eba"},
  "win-release/media_tests_av_perf/cpu/crowd720.webm": {"reva": 155313, "revb": 155418, "type": "absolute", "better": "lower", "improve": 0, "regress": 16, "sha1": "9aa94837"},
  "win-release/media_tests_av_perf/cpu/tulip2.m4a": {"reva": 155313, "revb": 155418, "type": "absolute", "better": "lower", "improve": 0, "regress": 0, "sha1": "6d1f5272"},
@@ skipping 337 matching lines @@
  "win-release/media_tests_av_perf/ttp/Wifi_dartmoor2.ogg": {"reva": 17420, "revb": 174996, "type": "absolute", "better": "lower", "improve": 12396.55, "regress": 14062.125, "sha1": "9ca7f6b1"},
  "win-release/media_tests_av_perf/ttp/Wifi_dartmoor2.wav": {"reva": 17420, "revb": 174996, "type": "absolute", "better": "lower", "improve": 6859.95, "regress": 24904.425, "sha1": "0e5625a5"},
  "win-release/media_tests_av_perf/ttp/Wifi_roller.webm": {"reva": 175328, "revb": 176157, "type": "absolute", "better": "lower", "improve": 906.775, "regress": 1184.925, "sha1": "d49e638f"},
  "xp-release/sizes/chrome.dll/chrome.dll": {"reva": 203454, "revb": 203508, "type": "absolute", "better": "lower", "improve": 55459814, "regress": 61312205, "sha1": "b01d47d9"},
  "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": 212973, "revb": 213132, "type": "absolute", "better": "lower", "improve": 28051174, "regress": 31094247, "sha1": "303dac45"},
  "xp-release/sizes/npchrome_frame.dll/npchrome_frame.dll": {"reva": 213618, "revb": 213647, "type": "absolute", "better": "lower", "improve": 2320128, "regress": 2567040, "sha1": "a9618db1"},
  "xp-release/sizes/setup.exe/setup.exe": {"reva": 183841, "revb": 184954, "type": "absolute", "better": "lower", "improve": 1080780, "regress": 1195085, "sha1": "c56e884e"},
  "load": true
 }