Move apps/shell to extensions/shell.

athena/resources/athena_resources.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_pak',
       'type': 'none',
       'dependencies': [
-        '../../apps/shell/app_shell.gyp:app_shell_pak',
         '../../ash/ash_resources.gyp:ash_resources',
         '../../content/content_resources.gyp:content_resources',
+        '../../extensions/shell/app_shell.gyp:app_shell_pak',
         '../../webkit/webkit_resources.gyp:webkit_resources',
         '../../webkit/webkit_resources.gyp:webkit_strings',
       ],
       'actions': [{
         'action_name': 'repack_athena_pack',
         'variables': {
           'pak_inputs': [
             '<(PRODUCT_DIR)/app_shell.pak',
             '<(SHARED_INTERMEDIATE_DIR)/ash/resources/ash_resources_100_percent.pak',
             '<(SHARED_INTERMEDIATE_DIR)/content/content_resources.pak',
             '<(SHARED_INTERMEDIATE_DIR)/webkit/blink_resources.pak',
             '<(SHARED_INTERMEDIATE_DIR)/webkit/webkit_strings_en-US.pak',
           ],
           'pak_output': '<(PRODUCT_DIR)/athena_resources.pak',
         },
         'includes': [ '../../build/repack_action.gypi' ],
       }],
     },
   ]
 }