Update symbolize_trace to work on macOS.

tracing/bin/symbolize_trace_atos_regex_unittest.py

+#!/usr/bin/env python
+# Copyright 2017 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import os
+import sys
+import unittest
+
+sys.path.insert(0, os.path.dirname(__file__))
+import symbolize_trace_atos_regex
+
+
+class AtosRegexTest(unittest.TestCase):
+  def testRegex(self):
+    if sys.platform != "darwin":
+      return
+    matcher = symbolize_trace_atos_regex.AtosRegexMatcher()
+    text = "-[SKTGraphicView drawRect:] (in Sketch) (SKTGraphicView.m:445)"
+    output = matcher.Match(text)
+    self.assertEqual("-[SKTGraphicView drawRect:]", output)
+
+    text = "malloc (in libsystem_malloc.dylib) + 42"
+    output = matcher.Match(text)
+    self.assertEqual("malloc", output)
+
+    expected_output = (
+        "content::CacheStorage::MatchAllCaches(std::__1::unique_ptr<content::Se"
+        "rviceWorkerFetchRequest, std::__1::default_delete<content::ServiceWork"
+        "erFetchRequest> >, content::CacheStorageCacheQueryParams const&, base:"
+        ":Callback<void (content::CacheStorageError, std::__1::unique_ptr<conte"
+        "nt::ServiceWorkerResponse, std::__1::default_delete<content::ServiceWo"
+        "rkerResponse> >, std::__1::unique_ptr<storage::BlobDataHandle, std::__"
+        "1::default_delete<storage::BlobDataHandle> >), (base::internal::CopyMo"
+        "de)1, (base::internal::RepeatMode)1> const&)"
+    )
+    text = expected_output + " (in Chromium Framework) (ref_counted.h:322)"
+    output = matcher.Match(text)
+    self.assertEqual(expected_output, output)
+
+    text = "0x4a12"
+    output = matcher.Match(text)
+    self.assertEqual(text, output)
+
+    text = "0x00000d9a (in Chromium)"
+    output = matcher.Match(text)
+    self.assertEqual(text, output)
+
+
+if __name__ == '__main__':
+  unittest.main()