Add an end-to-end test for symbolize_trace on macOS.

catapult_build/build_steps.py

 # Copyright 2016 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 argparse
 import json
 import os
 import sys
 
 # This is the list of tests to run. It is a dictionary with the following
@@ skipping 73 matching lines @@
         'name': 'Devil Python Tests',
         'path': 'devil/bin/run_py_tests',
         'disabled': ['mac', 'win'],
     },
     {
         'name': 'eslint Tests',
         'path': 'common/eslint/bin/run_tests',
         'disabled': ['android'],
     },
     {
+        'name': 'Native Heap Symbolizer Tests',
+        'path': 'tracing/bin/run_symbolizer_tests',
+        'disabled': ['android'],
+    },
+    {
         'name': 'Py-vulcanize Tests',
         'path': 'third_party/py_vulcanize/bin/run_py_tests',
         'additional_args': ['--no-install-hooks'],
         'disabled': ['android'],
     },
     {
         'name': 'Systrace Tests',
         'path': 'systrace/bin/run_tests',
     },
     {
@@ skipping 146 matching lines @@
       step['env']['CHROME_DEVEL_SANDBOX'] = '/opt/chromium/chrome_sandbox'
     if test.get('outputs_presentation_json'):
       step['outputs_presentation_json'] = True
     steps.append(step)
   with open(args.output_json, 'w') as outfile:
     json.dump(steps, outfile)
 
 
 if __name__ == '__main__':
   main(sys.argv[1:])