Create top level apps component and move some apps code there.

apps/apps.gypi

+# Copyright (c) 2013 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.
+
+{
+  'targets': [
+    {
+      'target_name': 'apps',
+      'type': 'static_library',
+      'variables': { 'enable_wexit_time_destructors': 1, },
+      # Since browser and browser_extensions actually depend on each other,
+      # we must omit the dependency from browser_extensions to browser.
+      # However, this means browser_extensions and browser should more or less
+      # have the same dependencies. Once browser_extensions is untangled from
+      # browser, then we can clean up these dependencies.
+      'dependencies': [
+        'browser_extensions',
+        'common/extensions/api/api.gyp:api',
+        '../skia/skia.gyp:skia',
+      ],
+      'include_dirs': [
+        '<(INTERMEDIATE_DIR)',
+      ],
+      'sources': [
+        'app_restore_service.cc',
+        'app_restore_service.h',
+        'app_restore_service_factory.cc',
+        'app_restore_service_factory.h',
+      ],
+      'conditions': [
+        ['enable_extensions==0', {
+          'sources/': [
+            ['exclude', '^apps/'],
+          ],
+        }],
+      ],
+    },
+  ],
+}