Fix the remaining subpixel antialiasing bugs in the notification center.

ui/message_center/message_center.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,
   },
   'targets': [
     {
@@ skipping 10 matching lines @@
         '../gfx/gfx.gyp:gfx',
         '../gfx/gfx.gyp:gfx_geometry',
         '../resources/ui_resources.gyp:ui_resources',
       ],
       'defines': [
         'MESSAGE_CENTER_IMPLEMENTATION',
       ],
       'sources': [
         'cocoa/notification_controller.h',
         'cocoa/notification_controller.mm',
+        'cocoa/opaque_views.h',
+        'cocoa/opaque_views.mm',
         'cocoa/popup_collection.h',
         'cocoa/popup_collection.mm',
         'cocoa/popup_controller.h',
         'cocoa/popup_controller.mm',
         'cocoa/settings_controller.h',
         'cocoa/settings_controller.mm',
         'cocoa/settings_entry_view.h',
         'cocoa/settings_entry_view.mm',
         'cocoa/status_item_view.h',
         'cocoa/status_item_view.mm',
@@ skipping 189 matching lines @@
         # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
         ['OS=="linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
           'dependencies': [
             '../../base/allocator/allocator.gyp:allocator',
           ],
         }],
       ],
     },  # target_name: message_center_unittests
   ],
 }