Introduces AppActivity and handler of chrome.shell API.

athena/main/athena_main.gyp

 # Copyright 2014 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': [
     {
       'target_name': 'athena_main',
       'type': 'executable',
       'dependencies': [
         '../athena.gyp:athena_lib',
         '../athena.gyp:athena_content_lib',
         '../../apps/shell/app_shell.gyp:app_shell_lib',
         '../../skia/skia.gyp:skia',
         '../../ui/accessibility/accessibility.gyp:ax_gen',
         '../../ui/app_list/app_list.gyp:app_list',
         '../../ui/views/views.gyp:views',
         '../../url/url.gyp:url_lib',
       ],
       'include_dirs': [
         '../..',
       ],
       'sources': [
+        'athena_app_window_controller.cc',
+        'athena_app_window_controller.h',
         'athena_launcher.cc',
         'athena_launcher.h',
         'url_search_provider.cc',
         'url_search_provider.h',
         'athena_main.cc',
         'placeholder.cc',
         'placeholder.h',
       ],
     },
     {
@@ skipping 10 matching lines @@
         '../../ui/resources/ui_resources.gyp:ui_test_pak',
         '../athena.gyp:athena_lib',
         '../athena.gyp:athena_test_support',
       ],
       'sources': [
         'athena_shell.cc',
       ],
     }
   ],  # targets
 }