Add chooser permission UI code for Mac

chrome/chrome_browser_ui.gypi

 # Copyright 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': {
     # There are two sections of sources:
     # * "Platform"-based sources (OS, toolkit, etc.)
     # * Feature/directory-based sources (e.g., history, printing)
 
@@ skipping 1277 matching lines @@
       'browser/ui/cocoa/validation_message_bubble_controller.h',
       'browser/ui/cocoa/vertical_gradient_view.h',
       'browser/ui/cocoa/vertical_gradient_view.mm',
       'browser/ui/cocoa/view_id_util.h',
       'browser/ui/cocoa/view_id_util.mm',
       'browser/ui/cocoa/view_resizer.h',
       'browser/ui/cocoa/web_contents_modal_dialog_manager_views_mac.h',
       'browser/ui/cocoa/web_contents_modal_dialog_manager_views_mac.mm',
       'browser/ui/cocoa/web_dialog_window_controller.h',
       'browser/ui/cocoa/web_dialog_window_controller.mm',
+      'browser/ui/cocoa/website_settings/chooser_bubble_ui_cocoa.h',
+      'browser/ui/cocoa/website_settings/chooser_bubble_ui_cocoa.mm',
       'browser/ui/cocoa/website_settings/permission_bubble_cocoa.h',
       'browser/ui/cocoa/website_settings/permission_bubble_cocoa.mm',
       'browser/ui/cocoa/website_settings/permission_bubble_controller.h',
       'browser/ui/cocoa/website_settings/permission_bubble_controller.mm',
       'browser/ui/cocoa/website_settings/permission_selector_button.h',
       'browser/ui/cocoa/website_settings/permission_selector_button.mm',
       'browser/ui/cocoa/website_settings/split_block_button.h',
       'browser/ui/cocoa/website_settings/split_block_button.mm',
       'browser/ui/cocoa/website_settings/website_settings_bubble_controller.h',
       'browser/ui/cocoa/website_settings/website_settings_bubble_controller.mm',
@@ skipping 2018 matching lines @@
           ],
           'sources': [
             '<@(chrome_browser_ui_non_mobile_sources)',
             '<@(chrome_browser_ui_omnibox_non_mobile_sources)',
           ],
         }],
       ],
     },
   ],
 }