Pull shell window stuff out of ExtensionHost and put in ShellWindow

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 399 matching lines @@
         'browser/extensions/settings/settings_sync_processor.cc',
         'browser/extensions/settings/settings_sync_processor.h',
         'browser/extensions/settings/settings_sync_util.cc',
         'browser/extensions/settings/settings_sync_util.h',
         'browser/extensions/settings/syncable_settings_storage.cc',
         'browser/extensions/settings/syncable_settings_storage.h',
         'browser/extensions/settings/testing_settings_storage.cc',
         'browser/extensions/settings/testing_settings_storage.h',
         'browser/extensions/settings/weak_unlimited_settings_storage.cc',
         'browser/extensions/settings/weak_unlimited_settings_storage.h',
+        'browser/extensions/shell_window_registry.cc',
+        'browser/extensions/shell_window_registry.h',
         'browser/extensions/theme_installed_infobar_delegate.cc',
         'browser/extensions/theme_installed_infobar_delegate.h',
         'browser/extensions/unpacked_installer.cc',
         'browser/extensions/unpacked_installer.h',
         'browser/extensions/updater/extension_downloader.cc',
         'browser/extensions/updater/extension_downloader.h',
         'browser/extensions/updater/extension_downloader_delegate.cc',
         'browser/extensions/updater/extension_downloader_delegate.h',
         'browser/extensions/updater/extension_updater.cc',
         'browser/extensions/updater/extension_updater.h',
@@ skipping 220 matching lines @@
             'browser/extensions/api/usb/usb_api.h',
             'browser/extensions/api/usb/usb_device_resource.cc',
             'browser/extensions/api/usb/usb_device_resource.h',
           ],
         }],
       ],
     },
   ],
 }