Fixed the racy code around the message-only window in base::MessagePumpForUI on Windows.

base/base.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     '../build/win_precompile.gypi',
@@ skipping 608 matching lines @@
         'values_unittest.cc',
         'version_unittest.cc',
         'vlog_unittest.cc',
         'win/dllmain.cc',
         'win/enum_variant_unittest.cc',
         'win/event_trace_consumer_unittest.cc',
         'win/event_trace_controller_unittest.cc',
         'win/event_trace_provider_unittest.cc',
         'win/i18n_unittest.cc',
         'win/iunknown_impl_unittest.cc',
+        'win/message_window_unittest.cc',
         'win/object_watcher_unittest.cc',
         'win/pe_image_unittest.cc',
         'win/registry_unittest.cc',
         'win/sampling_profiler_unittest.cc',
         'win/scoped_bstr_unittest.cc',
         'win/scoped_comptr_unittest.cc',
         'win/scoped_handle_unittest.cc',
         'win/scoped_process_information_unittest.cc',
+        'win/scoped_variant_unittest.cc',
         'win/shortcut_unittest.cc',
         'win/startup_information_unittest.cc',
-        'win/scoped_variant_unittest.cc',
         'win/win_util_unittest.cc',
         'win/wrapped_window_proc_unittest.cc',
       ],
       'dependencies': [
         'base',
         'base_i18n',
         'base_prefs',
         'base_prefs_test_support',
         'base_static',
         'run_all_unittests',
@@ skipping 611 matching lines @@
             'base_unittests.isolate',
           ],
           'sources': [
             'base_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }