[Eraser] First pass at removing the notification center panel.

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 678 matching lines @@
     ],
     # Aura but not ChromeOS.
     'chrome_browser_ui_aura_non_chromeos': [
       'browser/ui/aura/active_desktop_monitor.cc',
       'browser/ui/aura/active_desktop_monitor.h',
       'browser/ui/views/chrome_views_delegate_aura.cc',
       'browser/ui/views/frame/desktop_browser_frame_aura.cc',
       'browser/ui/views/frame/desktop_browser_frame_aura.h',
       'browser/ui/views/message_center/message_center_frame_view.cc',
       'browser/ui/views/message_center/message_center_frame_view.h',
-      'browser/ui/views/message_center/message_center_widget_delegate.cc',
-      'browser/ui/views/message_center/message_center_widget_delegate.h',
       'browser/ui/views/message_center/web_notification_tray.cc',
       'browser/ui/views/message_center/web_notification_tray.h',
-      'browser/ui/views/message_center/web_notification_tray_win.cc',
     ],
     # ChromeOS-only sources that don't end in _chromeos or live in a chromeos
     # directory.
     'chrome_browser_ui_chromeos_sources': [
       'browser/ui/app_list/search/launcher_search/launcher_search_icon_image_loader.cc',
       'browser/ui/app_list/search/launcher_search/launcher_search_icon_image_loader.h',
       'browser/ui/app_list/search/launcher_search/launcher_search_icon_image_loader_impl.cc',
       'browser/ui/app_list/search/launcher_search/launcher_search_icon_image_loader_impl.h',
       'browser/ui/app_list/search/launcher_search/launcher_search_provider.cc',
       'browser/ui/app_list/search/launcher_search/launcher_search_provider.h',
@@ skipping 2482 matching lines @@
           ],
           'sources': [
             '<@(chrome_browser_ui_non_mobile_sources)',
             '<@(chrome_browser_ui_omnibox_non_mobile_sources)',
           ],
         }],
       ],
     },
   ],
 }