Support notifications with custom content

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 54 matching lines @@
         'notification_types.cc',
         'notification_types.h',
         'notifier_settings.cc',
         'notifier_settings.h',
         'popup_timer.cc',
         'popup_timer.h',
         'popup_timers_controller.cc',
         'popup_timers_controller.h',
         'views/bounded_label.cc',
         'views/bounded_label.h',
+        "views/custom_notification_view.cc",
+        "views/custom_notification_view.h",
         'views/constants.h',
         'views/desktop_popup_alignment_delegate.cc',
         'views/desktop_popup_alignment_delegate.h',
         'views/message_bubble_base.cc',
         'views/message_bubble_base.h',
         'views/message_center_bubble.cc',
         'views/message_center_bubble.h',
         'views/message_center_button_bar.cc',
         'views/message_center_button_bar.h',
         'views/message_center_controller.h',
@@ skipping 130 matching lines @@
         ['toolkit_views==1 and OS!="mac"', {
           'dependencies': [
             # Compositor is needed by message_center_view_unittest.cc
             # and for the fonts used by bounded_label_unittest.cc.
             '../compositor/compositor.gyp:compositor',
             '../views/views.gyp:views',
             '../views/views.gyp:views_test_support',
           ],
           'sources': [
             'views/bounded_label_unittest.cc',
+            'views/custom_notification_view_unittest.cc',
             'views/message_center_view_unittest.cc',
             'views/message_popup_collection_unittest.cc',
             'views/notification_view_unittest.cc',
             'views/notifier_settings_view_unittest.cc',
           ],
         }],
         ['notifications==0', {  # Android and iOS.
           'sources/': [
             # Exclude everything except main().
             ['exclude', '\\.(cc|mm)$'],
@@ skipping 23 matching lines @@
               'dependencies': [
                 '../../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }