Implement native web notifications for mac

chrome/chrome_browser.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': {
     # All .cc, .h, .m, and .mm files under browser except for:
     # * tests and mocks.
     # * code below browser/chromeos
     # * code below browser/extensions
@@ skipping 2041 matching lines @@
       'browser/notifications/notification.cc',
       'browser/notifications/notification.h',
       'browser/notifications/notification_delegate.h',
       'browser/notifications/notification_object_proxy.cc',
       'browser/notifications/notification_object_proxy.h',
       'browser/notifications/notification_permission_context.cc',
       'browser/notifications/notification_permission_context.h',
       'browser/notifications/notification_permission_context_factory.cc',
       'browser/notifications/notification_permission_context_factory.h',
       'browser/notifications/notification_ui_manager.h',
+      'browser/notifications/notification_ui_manager_mac.h',
+      'browser/notifications/notification_ui_manager_mac.mm',        
       'browser/notifications/notifier_state_tracker.cc',
       'browser/notifications/notifier_state_tracker.h',
       'browser/notifications/notifier_state_tracker_factory.cc',
       'browser/notifications/notifier_state_tracker_factory.h',
       'browser/notifications/persistent_notification_delegate.cc',
       'browser/notifications/persistent_notification_delegate.h',
       'browser/notifications/platform_notification_service_impl.cc',
       'browser/notifications/platform_notification_service_impl.h',
       'browser/notifications/profile_notification.cc',
       'browser/notifications/profile_notification.h',
@@ skipping 2118 matching lines @@
             '../components/components.gyp:omnibox_browser',
             '../components/components.gyp:rlz',
             '../components/components.gyp:search_engines',
             '../rlz/rlz.gyp:rlz_lib',
           ],
         },
       ],
     }],
   ],
 }