mac: Fix gn bootstrap after https://codereview.chromium.org/2768933002

tools/gn/bootstrap/bootstrap.py

 #!/usr/bin/env python
 # Copyright 2014 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.
 
 # This file isn't officially supported by the Chromium project. It's maintained
 # on a best-effort basis by volunteers, so some things may be broken from time
 # to time. If you encounter errors, it's most often due to files in base that
 # have been added or moved since somebody last tried this script. Generally
 # such errors are easy to diagnose.
@@ skipping 630 matching lines @@
         'base/mac/foundation_util.mm',
         'base/mac/mach_logging.cc',
         'base/mac/scoped_mach_port.cc',
         'base/mac/scoped_mach_vm.cc',
         'base/mac/scoped_nsautorelease_pool.mm',
         'base/memory/shared_memory_handle_mac.cc',
         'base/memory/shared_memory_mac.cc',
         'base/message_loop/message_pump_mac.mm',
         'base/metrics/field_trial.cc',
         'base/process/process_handle_mac.cc',
+        'base/process/process_info_mac.cc',
         'base/process/process_iterator_mac.cc',
         'base/process/process_metrics_mac.cc',
         'base/strings/sys_string_conversions_mac.mm',
         'base/time/time_mac.cc',
         'base/threading/platform_thread_mac.mm',
         'base/trace_event/malloc_dump_provider.cc',
     ])
     static_libraries['libevent']['include_dirs'].extend([
         os.path.join(SRC_ROOT, 'base', 'third_party', 'libevent', 'mac')
     ])
@@ skipping 112 matching lines @@
     cmd.append('-v')
   cmd.append('gn')
   check_call(cmd)
 
   if not options.debug and not is_win:
     check_call(['strip', os.path.join(build_dir, 'gn')])
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))