Instantiation of OwnerKeyUtil is delegated to OwnerSettingsServiceFactory.

components/ownership.gypi

 # Copyright 2014 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': 'ownership',
     'type': '<(component)',
     'dependencies': [
       '<(DEPTH)/base/base.gyp:base',
       '<(DEPTH)/crypto/crypto.gyp:crypto',
     ],
     'defines': [
       'OWNERSHIP_IMPLEMENTATION',
     ],
     'sources': [
+      'ownership/mock_owner_key_util.cc',
+      'ownership/mock_owner_key_util.h',
       'ownership/owner_key_util.cc',
       'ownership/owner_key_util.h',
       'ownership/owner_key_util_impl.cc',
       'ownership/owner_key_util_impl.h',
      ],
-  },
-  { 'target_name': 'ownership_test_support',
-    'type': '<(component)',
-    'dependencies': [
-      '<(DEPTH)/base/base.gyp:base',
-      '<(DEPTH)/crypto/crypto.gyp:crypto',
-      'ownership',
-    ],
-    'defines': [
-      'OWNERSHIP_IMPLEMENTATION',
-    ],
-    'sources': [
-      'ownership/mock_owner_key_util.cc',
-      'ownership/mock_owner_key_util.h',
-    ],
   }],
 }