Switch thread_local to use chromium's TLS implementation

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,
       'base_i18n_target': 0,
     },
@@ skipping 598 matching lines @@
           '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.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',
           'threading/worker_pool.h',
           'threading/worker_pool.cc',
           'threading/worker_pool_posix.cc',
           'threading/worker_pool_posix.h',
           'threading/worker_pool_win.cc',
           'time/clock.cc',
@@ skipping 345 matching lines @@
           'i18n/time_formatting.h',
           'i18n/timezone.cc',
           'i18n/timezone.h',
           'i18n/utf8_validator_tables.cc',
           'i18n/utf8_validator_tables.h',
         ],
       }]
     ],
   },
 }