GN: fix bootstrap.py due to recent changes in //base

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.
 
 """Bootstraps gn.
 
 It is done by first building it manually in a temporary directory, then building
 it with its own BUILD.gn to the final destination.
 """
@@ skipping 204 matching lines @@
       'base/thread_task_runner_handle.cc',
       'base/threading/non_thread_safe_impl.cc',
       'base/threading/post_task_and_reply_impl.cc',
       'base/threading/sequenced_worker_pool.cc',
       'base/threading/simple_thread.cc',
       'base/threading/thread_checker_impl.cc',
       'base/threading/thread_collision_warner.cc',
       'base/threading/thread_id_name_manager.cc',
       'base/threading/thread_local_storage.cc',
       'base/threading/thread_restrictions.cc',
+      'base/threading/worker_pool.cc',
       'base/time/time.cc',
       'base/timer/elapsed_timer.cc',
       'base/timer/timer.cc',
       'base/trace_event/trace_event_impl.cc',
       'base/trace_event/trace_event_impl_constants.cc',
       'base/trace_event/trace_event_memory.cc',
       'base/trace_event/trace_event_synthetic_delay.cc',
       'base/tracked_objects.cc',
       'base/tracking_info.cc',
       'base/values.cc',
@@ skipping 12 matching lines @@
         'base/posix/file_descriptor_shuffle.cc',
         'base/process/kill_posix.cc',
         'base/process/process_handle_posix.cc',
         'base/process/process_metrics_posix.cc',
         'base/process/process_posix.cc',
         'base/safe_strerror_posix.cc',
         'base/synchronization/condition_variable_posix.cc',
         'base/synchronization/lock_impl_posix.cc',
         'base/synchronization/waitable_event_posix.cc',
         'base/sys_info_posix.cc',
+        'base/threading/platform_thread_internal_posix.cc',
         'base/threading/platform_thread_posix.cc',
         'base/threading/thread_local_posix.cc',
         'base/threading/thread_local_storage_posix.cc',
+        'base/threading/worker_pool_posix.cc',
         'base/time/time_posix.cc',
     ])
     static_libraries['libevent'] = {
         'sources': [
             'third_party/libevent/buffer.c',
             'third_party/libevent/evbuffer.c',
             'third_party/libevent/evdns.c',
             'third_party/libevent/event.c',
             'third_party/libevent/event_tagging.c',
             'third_party/libevent/evrpc.c',
@@ skipping 134 matching lines @@
     cmd.append('-v')
   cmd.append('gn')
   check_call(cmd)
 
   if not options.debug:
     check_call(['strip', os.path.join(build_dir, 'gn')])
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))