ui/base: Move message_box_win.{h,cc} to ui/base/win.

ui/ui.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': [
     'ui_resources.gypi',
@@ skipping 151 matching lines @@
         'base/l10n/l10n_font_util.cc',
         'base/l10n/l10n_font_util.h',
         'base/l10n/l10n_util.cc',
         'base/l10n/l10n_util.h',
         'base/l10n/l10n_util_collator.h',
         'base/l10n/l10n_util_mac.h',
         'base/l10n/l10n_util_mac.mm',
         'base/l10n/l10n_util_posix.cc',
         'base/l10n/l10n_util_win.cc',
         'base/l10n/l10n_util_win.h',
-        'base/message_box_win.cc',
-        'base/message_box_win.h',
         'base/models/button_menu_item_model.cc',
         'base/models/button_menu_item_model.h',
         'base/models/combobox_model.h',
         'base/models/list_model.h',
         'base/models/list_model_observer.h',
         'base/models/menu_model.cc',
         'base/models/menu_model.h',
         'base/models/menu_model_delegate.h',
         'base/models/simple_menu_model.cc',
         'base/models/simple_menu_model.h',
@@ skipping 40 matching lines @@
         'base/view_prop.h',
         'base/wayland/events_wayland.cc',
         'base/win/atl_module.h',
         'base/win/events_win.cc',
         'base/win/foreground_helper.cc',
         'base/win/foreground_helper.h',
         'base/win/hwnd_util.cc',
         'base/win/hwnd_util.h',
         'base/win/ime_input.cc',
         'base/win/ime_input.h',
+        'base/win/message_box_win.cc',
+        'base/win/message_box_win.h',
         'base/win/mouse_wheel_util.cc',
         'base/win/mouse_wheel_util.h',
         'base/win/shell.cc',
         'base/win/shell.h',
         'base/win/singleton_hwnd.cc',
         'base/win/singleton_hwnd.h',
         'base/win/window_impl.cc',
         'base/win/window_impl.h',
         'base/x/active_window_watcher_x.cc',
         'base/x/active_window_watcher_x.h',
@@ skipping 450 matching lines @@
                 'shutil.copyfile(\'<(ui_copy_target)\', \'<(ui_copy_dest)\'); ' \
                 'os.chmod(\'<(ui_copy_dest)\', 0700)'
               ]
             }
           ],
         },
       ],
     }],
   ],
 }