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

chrome/chrome.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': {
     'chromium_code': 1,
 
     # Define the common dependencies that contain all the actual
     # Chromium functionality.  This list gets pulled in below by
     # the link of the actual chrome (or chromium) executable on
@@ skipping 137 matching lines @@
       'includes': [
         'app/policy/policy_templates.gypi',
         'chrome_browser_extensions.gypi',
         'chrome_dll.gypi',
         'chrome_exe.gypi',
         'chrome_installer.gypi',
         'chrome_installer_util.gypi',
         'chrome_renderer.gypi',
         'chrome_tests.gypi',
         'nacl.gypi',
+        '../apps/apps.gypi',
       ],
       'targets': [
         {
           'target_name': 'default_extensions',
           'type': 'none',
           'conditions': [
             ['OS=="win"', {
               'copies': [
                 {
                   'destination': '<(PRODUCT_DIR)/extensions',
@@ skipping 918 matching lines @@
             '../build/java.gypi',
           ],
         },
       ], # 'targets'
       'includes': [
         'chrome_android.gypi',
       ]}, # 'includes'
     ],  # OS=="android"
   ],  # 'conditions'
 }