Create new app_shell.gyp for app_shell targets.

build/all.gyp

 # Copyright (c) 2012 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': {
     # A hook that can be overridden in other repositories to add additional
     # compilation targets to 'All'. Only used on Android.
     'android_app_targets%': [],
   },
@@ skipping 205 matching lines @@
         ['enable_app_list==1', {
           'dependencies': [
             '../ui/app_list/app_list.gyp:*',
           ],
         }],
         ['OS!="android" and OS!="ios"', {
           'dependencies': [
             '../google_apis/gcm/gcm.gyp:*',
           ],
         }],
+        ['chromeos==1 or (OS=="linux" and use_aura==1) or (OS=="win" and use_aura==1)', {
+          'dependencies': [
+            '../apps/shell/app_shell.gyp:*',
+          ],
+        }],
       ],
     }, # target_name: All
     {
       'target_name': 'All_syzygy',
       'type': 'none',
       'conditions': [
         ['OS=="win" and fastbuild==0 and target_arch=="ia32" and '
             '(syzyasan==1 or syzygy_optimize==1)', {
           'dependencies': [
             '../chrome/installer/mini_installer_syzygy.gyp:*',
@@ skipping 994 matching lines @@
             # http://crbug.com/157234
             #'../chrome/chrome.gyp:sync_integration_tests_run',
             '../chrome/chrome.gyp:unit_tests_run',
             '../net/net.gyp:net_unittests_run',
           ],
         }, # target_name: chromium_swarm_tests
       ],
     }],
   ], # conditions
 }