Fix GN bootstrap.

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 366 matching lines @@
       'base/third_party/dynamic_annotations/dynamic_annotations.c',
       'base/third_party/superfasthash/superfasthash.c',
   ])
   static_libraries['base']['sources'].extend([
       'base/allocator/allocator_check.cc',
       'base/allocator/allocator_extension.cc',
       'base/at_exit.cc',
       'base/base_paths.cc',
       'base/base_switches.cc',
       'base/build_time.cc',
+      'base/callback_helpers.cc',
       'base/callback_internal.cc',
       'base/command_line.cc',
       'base/debug/activity_tracker.cc',
       'base/debug/alias.cc',
       'base/debug/dump_without_crashing.cc',
       'base/debug/stack_trace.cc',
       'base/debug/task_annotator.cc',
       'base/environment.cc',
       'base/feature_list.cc',
       'base/files/file.cc',
@@ skipping 201 matching lines @@
     static_libraries['xdg_user_dirs'] = {
         'sources': [
             'base/third_party/xdg_user_dirs/xdg_user_dir_lookup.cc',
         ],
         'tool': 'cxx',
     }
     static_libraries['base']['sources'].extend([
         'base/allocator/allocator_shim.cc',
         'base/allocator/allocator_shim_default_dispatch_to_glibc.cc',
         'base/memory/shared_memory_posix.cc',
+        'base/memory/shared_memory_tracker.cc',
         'base/nix/xdg_util.cc',
         'base/process/internal_linux.cc',
         'base/process/memory_linux.cc',
         'base/process/process_handle_linux.cc',
         'base/process/process_iterator_linux.cc',
         'base/process/process_linux.cc',
         'base/process/process_metrics_linux.cc',
         'base/strings/sys_string_conversions_posix.cc',
         'base/sys_info_linux.cc',
         'base/threading/platform_thread_linux.cc',
@@ skipping 152 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:]))