Moved CreateNativeAppWindow from AppWindow::Delegate to AppsClient.

chrome/chrome_browser_extensions.gypi

 # Copyright (c) 2013 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': {
     # These variables are shared with the GN build.
     # Name is that these are the extensions files for the extensions target.
     # "chrome_browser_extensions_sources' are the extensions files in the
     # browser target.
@@ skipping 319 matching lines @@
       'browser/extensions/api/easy_unlock_private/easy_unlock_private_crypto_delegate_stub.cc',
       'browser/extensions/api/feedback_private/feedback_service_nonchromeos.cc',
       'browser/extensions/api/image_writer_private/operation_nonchromeos.cc',
       'browser/extensions/api/image_writer_private/removable_storage_provider_linux.cc',
     ],
     'chrome_browser_extensions_enabled_sources': [
       'browser/apps/app_launch_for_metro_restart_win.cc',
       'browser/apps/app_launch_for_metro_restart_win.h',
       'browser/apps/app_url_redirector.cc',
       'browser/apps/app_url_redirector.h',
-      'browser/apps/chrome_apps_client.cc',
-      'browser/apps/chrome_apps_client.h',
       'browser/apps/ephemeral_app_launcher.cc',
       'browser/apps/ephemeral_app_launcher.h',
       'browser/apps/ephemeral_app_service_factory.cc',
       'browser/apps/ephemeral_app_service_factory.h',
       'browser/apps/ephemeral_app_throttle.cc',
       'browser/apps/ephemeral_app_throttle.h',
       'browser/apps/install_chrome_app.cc',
       'browser/apps/install_chrome_app.h',
       'browser/apps/per_app_settings_service.cc',
       'browser/apps/per_app_settings_service.h',
@@ skipping 839 matching lines @@
         }],
         ['enable_app_list==1', {
           'sources': [
             '<@(chrome_browser_extensions_app_list_sources)',
           ],
         }]
       ],
     },
   ],
 }