Add ability to retrieve a thread_name given a thread_id.

base/base.gypi

 # Copyright (c) 2012 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.
 
 {
   'target_defaults': {
     'variables': {
       'base_target': 0,
     },
     'target_conditions': [
@@ skipping 433 matching lines @@
           'threading/sequenced_worker_pool.h',
           'threading/simple_thread.cc',
           'threading/simple_thread.h',
           'threading/thread.cc',
           'threading/thread.h',
           'threading/thread_checker.h',
           'threading/thread_checker_impl.cc',
           'threading/thread_checker_impl.h',
           'threading/thread_collision_warner.cc',
           'threading/thread_collision_warner.h',
+          'threading/thread_id_name_manager.cc',
+          'threading/thread_id_name_manager.h',
           'threading/thread_local.h',
           'threading/thread_local_posix.cc',
           'threading/thread_local_storage.h',
           'threading/thread_local_storage_posix.cc',
           'threading/thread_local_storage_win.cc',
           'threading/thread_local_win.cc',
           'threading/thread_restrictions.h',
           'threading/thread_restrictions.cc',
           'threading/watchdog.cc',
           'threading/watchdog.h',
@@ skipping 258 matching lines @@
           # Remove all unnecessary files for build_nexe.py to avoid exceeding
           # command-line-string limitation when building NaCl on Windows.
           ['OS == "win" and >(nacl_untrusted_build)==1', {
               'sources/': [ ['exclude', '\\.h$'] ],
           }],
         ],
       }],
     ],
   },
 }