athena: Add the concept of Activity and related managers.

athena/ui/athena_ui_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_ui_main',
       'type': 'executable',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../base/base.gyp:base_i18n',
         '../../skia/skia.gyp:skia',
         '../../ui/accessibility/accessibility.gyp:ax_gen',
         '../../ui/aura/aura.gyp:aura',
         '../../ui/aura/aura.gyp:aura_test_support',
         '../../ui/compositor/compositor.gyp:compositor',
         '../../ui/compositor/compositor.gyp:compositor_test_support',
         '../../ui/gfx/gfx.gyp:gfx',
+        '../../ui/resources/ui_resources.gyp:ui_resources',
+        '../../ui/strings/ui_strings.gyp:ui_strings',
         '../../ui/views/views.gyp:views',
         '../../ui/wm/wm.gyp:wm',
         '../../ui/wm/wm.gyp:wm_test_support',
         '../athena.gyp:athena_lib',
       ],
       'include_dirs': [
         '../..',
       ],
       'sources': [
         'athena_ui_main.cc',
+        'sample_task.cc',
+        'sample_task.h',
       ],
     },
   ],  # targets
 }