Allow Thread to initialize COM for Windows consumers who need it

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 394 matching lines @@
           'sys_string_conversions.h',
           'sys_string_conversions_mac.mm',
           'sys_string_conversions_posix.cc',
           'sys_string_conversions_win.cc',
           'task_runner.cc',
           'task_runner.h',
           'task_runner_util.h',
           'template_util.h',
           'thread_task_runner_handle.cc',
           'thread_task_runner_handle.h',
+          'threading/com_thread.h',
+          'threading/com_thread_win.cc',
           'threading/non_thread_safe.h',
           'threading/non_thread_safe_impl.cc',
           'threading/non_thread_safe_impl.h',
           'threading/platform_thread.h',
           'threading/platform_thread_mac.mm',
           'threading/platform_thread_posix.cc',
           'threading/platform_thread_win.cc',
           'threading/post_task_and_reply_impl.cc',
           'threading/post_task_and_reply_impl.h',
           'threading/sequenced_worker_pool.cc',
@@ skipping 273 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$'] ],
           }],
         ],
       }],
     ],
   },
 }