Instantiation of OwnerKeyUtil is delegated to OwnerSettingsServiceFactory.

chrome/browser/chromeos/ownership/owner_settings_service_factory.cc

 // 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.
 
 #include "chrome/browser/chromeos/ownership/owner_settings_service_factory.h"
 
+#include "base/path_service.h"
 #include "chrome/browser/chromeos/ownership/owner_settings_service.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chromeos/chromeos_paths.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
+#include "components/ownership/mock_owner_key_util.h"
+#include "components/ownership/owner_key_util_impl.h"
 
 namespace chromeos {
 
 OwnerSettingsServiceFactory::OwnerSettingsServiceFactory()
     : BrowserContextKeyedServiceFactory(
           "OwnerSettingsService",
           BrowserContextDependencyManager::GetInstance()) {
 }
 
 OwnerSettingsServiceFactory::~OwnerSettingsServiceFactory() {
 }
 
 // static
 OwnerSettingsService* OwnerSettingsServiceFactory::GetForProfile(
     Profile* profile) {
   return static_cast<OwnerSettingsService*>(
       GetInstance()->GetServiceForBrowserContext(profile, true));
 }
 
 // static
 OwnerSettingsServiceFactory* OwnerSettingsServiceFactory::GetInstance() {
   return Singleton<OwnerSettingsServiceFactory>::get();
 }
 
+scoped_refptr<ownership::OwnerKeyUtil>
+OwnerSettingsServiceFactory::GetOwnerKeyUtil() {
+  if (owner_key_util_.get())
+    return owner_key_util_;
+  base::FilePath public_key_path;
+  if (!PathService::Get(chromeos::FILE_OWNER_KEY, &public_key_path))
+    return NULL;
+  owner_key_util_ = new ownership::OwnerKeyUtilImpl(public_key_path);
+  return owner_key_util_;
+}
+
 // static
 KeyedService* OwnerSettingsServiceFactory::BuildInstanceFor(
     content::BrowserContext* browser_context) {
   Profile* profile = static_cast<Profile*>(browser_context);
   if (profile->IsGuestSession() || ProfileHelper::IsSigninProfile(profile))
     return NULL;
-  return new OwnerSettingsService(profile);
+  return new OwnerSettingsService(profile, GetInstance()->GetOwnerKeyUtil());
 }
 
 bool OwnerSettingsServiceFactory::ServiceIsCreatedWithBrowserContext() const {
   return true;
 }
 
 KeyedService* OwnerSettingsServiceFactory::BuildServiceInstanceFor(
     content::BrowserContext* context) const {
   return BuildInstanceFor(context);
 }
 
 }  // namespace chromeos