Update perf expectations for linux/mac sizes/initializers

tools/perf_expectations/perf_expectations.json

Index: tools/perf_expectations/perf_expectations.json
diff --git a/tools/perf_expectations/perf_expectations.json b/tools/perf_expectations/perf_expectations.json
index f99472f6c944433aaad96c3fb3b2c17508d726b1..4494d662c4eb64970c9dbfa779df401a0b9c7da5 100644
--- a/tools/perf_expectations/perf_expectations.json
+++ b/tools/perf_expectations/perf_expectations.json
@@ -364,10 +364,10 @@
  "linux-release/media_tests_av_perf/ttp/Wifi_roller.webm": {"reva": 175328, "revb": 176157, "type": "absolute", "better": "lower", "improve": 867.35, "regress": 1041.075, "sha1": "d99ce51c"},
  "linux-release/sizes/chrome-bss/bss": {"reva": 260243, "revb": 260270, "type": "absolute", "better": "lower", "improve": 324470, "regress": 358626, "sha1": "85f07232"},
  "linux-release/sizes/chrome-data/data": {"reva": 234134, "revb": 234142, "type": "absolute", "better": "lower", "improve": 1909598, "regress": 2363084, "sha1": "c3b393d2"},
- "linux-release/sizes/chrome-si/initializers": {"reva": 251221, "revb": 251221, "type": "absolute", "better": "lower", "improve": 19, "regress": 19, "tolerance": 0, "sha1": "6800698b"},
+ "linux-release/sizes/chrome-si/initializers": {"reva": 269914, "revb": 270012, "type": "absolute", "better": "lower", "improve": 19, "regress": 20, "tolerance": 0, "sha1": "73bf8eba"},
  "linux-release/sizes/chrome-text/text": {"reva": 266534, "revb": 266562, "type": "absolute", "better": "lower", "improve": 94446673, "regress": 104400197, "sha1": "1ff99c2f"},
  "linux-release/sizes/chrome-textrel/textrel": {"reva": 234134, "revb": 234142, "type": "absolute", "better": "lower", "improve": 0, "regress": 0, "sha1": "61db9eaf"},
- "linux-release/sizes/chrome/chrome": {"reva": 255987, "revb": 256040, "type": "absolute", "better": "lower", "improve": 124060944, "regress": 137121148, "sha1": "7e193e84"},
+ "linux-release/sizes/chrome/chrome": {"reva": 269914, "revb": 270012, "type": "absolute", "better": "lower", "improve": 130247701, "regress": 143971924, "sha1": "2e4fee98"},
  "linux-release/sizes/libffmpegsumo.so-textrel/textrel": {"reva": 200467, "revb": 203456, "type": "absolute", "better": "lower", "improve": 1075, "regress": 1189, "sha1": "a10d4ea4"},
  "linux-release/sizes/nacl_helper-bss/bss": {"reva": 252556, "revb": 252565, "type": "absolute", "better": "lower", "improve": 120631, "regress": 133329, "sha1": "7839f502"},
  "linux-release/sizes/nacl_helper-data/data": {"reva": 252556, "revb": 252565, "type": "absolute", "better": "lower", "improve": 118392, "regress": 130856, "sha1": "65801b05"},
@@ -384,7 +384,7 @@
  "mac-release/sizes/Chromium.app/Chromium.app": {"reva": 236254, "revb": 236257, "type": "absolute", "better": "lower", "improve": 120545484, "regress": 133234484, "sha1": "6971d225"},
  "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": 255987, "revb": 256040, "type": "absolute", "better": "lower", "improve": 72472577, "regress": 80101271, "sha1": "566fdec6"},
- "mac-release/sizes/chrome-si/initializers": {"reva": 251218, "revb": 251218, "type": "absolute", "better": "lower", "improve": 1, "regress": 1, "tolerance": 0, "sha1": "557cb121"},
+ "mac-release/sizes/chrome-si/initializers": {"reva": 269914, "revb": 270012, "type": "absolute", "better": "lower", "improve": 1, "regress": 2, "tolerance": 0, "sha1": "587d0ad9"},
  "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"},