Fix mac sizes The mac build updated to build 64 bit binaries, so the sizes

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 64b41e0d8fd5952e6ffbb1137080f5230e16644b..3067456f698c166eb0546cd7140d2cb98a1302f0 100644
--- a/tools/perf_expectations/perf_expectations.json
+++ b/tools/perf_expectations/perf_expectations.json
@@ -381,9 +381,9 @@
  "linux-release/sizes/nacl_helper_bootstrap-text/text": {"reva": 256743, "revb": 256743, "type": "absolute", "better": "lower", "improve": 4882, "regress": 5396, "sha1": "ffc106e5"},
  "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": 298901, "revb": 299000, "type": "absolute", "better": "lower", "improve": 136390451, "regress": 150983885, "sha1": "9858fcf5"},
+ "mac-release/sizes/Chromium.app/Chromium.app": {"reva": 305049, "revb": 305099, "type": "absolute", "better": "lower", "improve": 150118604, "regress": 165929165, "sha1": "6133e499"},
  "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": 280730, "revb": 280780, "type": "absolute", "better": "lower", "improve": 76114300, "regress": 84126366, "sha1": "e48521cd"},
+ "mac-release/sizes/ChromiumFramework/ChromiumFramework": {"reva": 305049, "revb": 305099, "type": "absolute", "better": "lower", "improve": 90343214, "regress": 99857361, "sha1": "d3a8505a"},
  "mac-release/sizes/chrome-si/initializers": {"reva": 281731, "revb": 281731, "type": "absolute", "better": "lower", "improve": 0, "regress": 0, "tolerance": 0, "sha1": "01759b7f"},
  "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"},