Create profile_sync_test_util in components

components/browser_sync.gypi

 # Copyright 2015 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': [
     {
       # GN version: //components/browser_sync_browser
       'target_name': 'browser_sync_browser',
       'type': 'static_library',
@@ skipping 56 matching lines @@
     },
     {
       # GN version: //components/browser_sync/browser:test_support
       'target_name': 'browser_sync_browser_test_support',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
         '../google_apis/google_apis.gyp:google_apis',
         '../sync/sync.gyp:sync',
         '../testing/gmock.gyp:gmock',
+        'sync_driver',
         'sync_driver_test_support',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         # Note: file list duplicated in GN build.
         'browser_sync/browser/profile_sync_service_mock.cc',
         'browser_sync/browser/profile_sync_service_mock.h',
+        'browser_sync/browser/profile_sync_test_util.cc',
+        'browser_sync/browser/profile_sync_test_util.h',
       ],
     }
   ],
 }