[iOS] Support for chrome://version

components/version_ui.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/version_ui
       'target_name': 'version_ui',
       'type': 'static_library',
       'include_dirs': [
         '..',
       ],
+      'dependencies': [
+        'variations',
+        '../base/base.gyp:base',
+      ],
       'sources': [
         # Note: sources list duplicated in GN build.
+        'version_ui/version_handler_helper.cc',
+        'version_ui/version_handler_helper.h',
         'version_ui/version_ui_constants.cc',
         'version_ui/version_ui_constants.h',
       ],
     },
   ],
 }