make StackingClient dispatch to either ash or desktop

chrome/chrome_browser_ui.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.
 
 {
   'targets': [
     {
       'target_name': 'browser_ui',
       'type': 'static_library',
@@ skipping 143 matching lines @@
         'browser/ui/ash/tabs/dock_info_ash.h',
         'browser/ui/ash/tabs/dock_info_chromeos.cc',
         'browser/ui/ash/user_action_handler.cc',
         'browser/ui/ash/user_action_handler.h',
         'browser/ui/ash/volume_controller_chromeos.cc',
         'browser/ui/ash/volume_controller_chromeos.h',
         'browser/ui/ash/window_positioner.cc',
         'browser/ui/ash/window_positioner.h',
         'browser/ui/aura/chrome_browser_main_extra_parts_aura.cc',
         'browser/ui/aura/chrome_browser_main_extra_parts_aura.h',
+        'browser/ui/aura/stacking_client_aurawin.cc',
+        'browser/ui/aura/stacking_client_aurawin.h',
         'browser/ui/aura/tabs/dock_info_aurax11.cc',
         'browser/ui/autofill/autofill_dialog_controller.cc',
         'browser/ui/autofill/autofill_dialog_controller.h',
         'browser/ui/autofill/autofill_dialog_template.cc',
         'browser/ui/autofill/autofill_dialog_template.h',
         'browser/ui/autofill/autofill_dialog_view.cc',
         'browser/ui/autofill/autofill_dialog_view.h',
         'browser/ui/autofill/tab_autofill_manager_delegate.cc',
         'browser/ui/autofill/tab_autofill_manager_delegate.h',
         'browser/ui/auto_login_info_bar_delegate.cc',
@@ skipping 2568 matching lines @@
             ['exclude', '^browser/ui/views/select_file_dialog_extension.cc'],
             ['exclude', '^browser/ui/views/select_file_dialog_extension.h'],
             ['exclude', '^browser/ui/views/select_file_dialog_extension_factory.cc'],
             ['exclude', '^browser/ui/views/select_file_dialog_extension_factory.h'],
           ]}
         ],
       ],
     },
   ],
 }