Switch to direct use of OwnerSettingsServiceChromeOS::Set() in tests.

chrome/browser/chromeos/ownership/fake_owner_settings_service.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/fake_owner_settings_service.h"
 
+#include "chrome/browser/chromeos/settings/cros_settings.h"
+#include "components/ownership/mock_owner_key_util.h"
+
 namespace chromeos {
 
+FakeOwnerSettingsService::FakeOwnerSettingsService(Profile* profile)
+    : OwnerSettingsServiceChromeOS(nullptr,
+                                   profile,
+                                   new ownership::MockOwnerKeyUtil()),
+      set_management_settings_result_(true) {
+}
+
 FakeOwnerSettingsService::FakeOwnerSettingsService(
     Profile* profile,
     const scoped_refptr<ownership::OwnerKeyUtil>& owner_key_util)
     : OwnerSettingsServiceChromeOS(nullptr, profile, owner_key_util),
       set_management_settings_result_(true) {
 }
 
 FakeOwnerSettingsService::~FakeOwnerSettingsService() {
 }
 
 void FakeOwnerSettingsService::SetManagementSettings(
     const ManagementSettings& settings,
     const OnManagementSettingsSetCallback& callback) {
   last_settings_ = settings;
   callback.Run(set_management_settings_result_);
 }
 
+bool FakeOwnerSettingsService::Set(const std::string& setting,
+                                   const base::Value& value) {
+  CrosSettingsProvider* provider = CrosSettings::Get()->GetProvider(setting);

[bartfab (slow), 2015/03/31 14:12:40]

Nit: #include "chromeos/settings/cros_settings_provider.h"

+  provider->Set(setting, value);
+  return true;
+}
+
 }  // namespace chromeos