Support chrome.windows extension API events for browserless Panels.

chrome/chrome_browser_extensions.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'browser_extensions',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 498 matching lines @@
         'browser/extensions/webstore_inline_installer.cc',
         'browser/extensions/webstore_inline_installer.h',
         'browser/extensions/webstore_install_helper.cc',
         'browser/extensions/webstore_install_helper.h',
         'browser/extensions/webstore_installer.cc',
         'browser/extensions/webstore_installer.h',
         'browser/extensions/window_controller.cc',
         'browser/extensions/window_controller.h',
         'browser/extensions/window_controller_list.cc',
         'browser/extensions/window_controller_list.h',
+        'browser/extensions/window_controller_list_observer.h',
+        'browser/extensions/window_event_router.cc',
+        'browser/extensions/window_event_router.h',
       ],
       'conditions': [
         ['chromeos==0', {
           'sources/': [
             ['exclude', 'browser/extensions/api/terminal/terminal_extension_helper.cc'],
             ['exclude', 'browser/extensions/api/terminal/terminal_extension_helper.h'],
             ['exclude', 'browser/extensions/api/terminal/terminal_private_api.cc'],
             ['exclude', 'browser/extensions/api/terminal/terminal_private_api.h'],
             ['exclude', 'browser/extensions/extension_input_ime_api.cc'],
             ['exclude', 'browser/extensions/extension_input_ime_api.h'],
@@ skipping 216 matching lines @@
           ],
           'sources': [
             'browser/extensions/app_host_stub_main.cc',
           ],
         },
       ],
     }, ],  # 'OS=="win"'
   ],  # 'conditions'
 }