Introduces AppActivity and handler of chrome.shell API.

athena/athena.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': [
     {
@@ skipping 57 matching lines @@
         '../skia/skia.gyp:skia',
       ],
       'defines': [
         'ATHENA_IMPLEMENTATION',
       ],
       'sources': [
         'content/public/content_activity_factory.h',
         'content/public/content_app_model_builder.h',
         'content/content_activity_factory.cc',
         'content/content_app_model_builder.cc',
+        'content/app_activity.h',
+        'content/app_activity.cc',
         'content/web_activity.h',
         'content/web_activity.cc',
       ],
     },
     {
       'target_name': 'athena_test_support',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:test_support_base',
         '../skia/skia.gyp:skia',
@@ skipping 37 matching lines @@
       'sources': [
         'test/athena_unittests.cc',
         'activity/activity_manager_unittest.cc',
         'input/accelerator_manager_unittest.cc',
         'wm/window_manager_unittest.cc',
       ],
     }
   ],
 }