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

chrome/browser/chromeos/settings/settings_provider_test_base.cc

+// Copyright (c) 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.
+
+#include "chrome/browser/chromeos/settings/settings_provider_test_base.h"
+
+#include "chrome/browser/chromeos/ownership/fake_owner_settings_service.h"
+#include "chrome/browser/chromeos/settings/cros_settings.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace chromeos {
+
+SettingsProviderTestBase::SettingsProviderTestBase() {
+  if (!DeviceSettingsService::IsInitialized()) {

[bartfab (slow), 2015/03/31 14:12:41]

Nit: #include "chrome/browser/chromeos/settings/device_settings_service.h"

+    test_device_settings_service_.reset(new ScopedTestDeviceSettingsService());
+    test_cros_settings_.reset(new ScopedTestCrosSettings());
+  }
+}
+
+SettingsProviderTestBase::SettingsProviderTestBase(
+    bool create_settings_service) {
+  if (create_settings_service && !DeviceSettingsService::IsInitialized()) {
+    test_device_settings_service_.reset(new ScopedTestDeviceSettingsService());

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

Nit: Move this common code out to a helper method.

+    test_cros_settings_.reset(new ScopedTestCrosSettings());
+  }
+}
+
+SettingsProviderTestBase::~SettingsProviderTestBase() {
+}
+
+void SettingsProviderTestBase::ReplaceProvider(const std::string& path) {
+  // Swap out the DeviceSettingsProvider with our settings provider so we can
+  // set values for the specified path.
+  CrosSettings* const cros_settings = CrosSettings::Get();
+  device_settings_provider_ = cros_settings->GetProvider(path);

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

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

+  EXPECT_TRUE(device_settings_provider_);
+  EXPECT_TRUE(cros_settings->RemoveSettingsProvider(device_settings_provider_));
+  cros_settings->AddSettingsProvider(&stub_settings_provider_);
+}
+
+void SettingsProviderTestBase::RestoreProvider() {
+  if (device_settings_provider_) {

[bartfab (slow), 2015/03/31 14:12:41]

Why is this conditional here? Do you expect RestoreProvider() to be called
multiple times? If so, you should clear |device_settings_provider_| once you
have restored the real settings provider. Otherwise, a subsequent call will take
the same branch and fail at the EXPECT_TRUE() below.

+    // Restore the real DeviceSettingsProvider.
+    CrosSettings* const cros_settings = CrosSettings::Get();
+    EXPECT_TRUE(
+        cros_settings->RemoveSettingsProvider(&stub_settings_provider_));
+    cros_settings->AddSettingsProvider(device_settings_provider_);
+  }
+}
+
+void SettingsProviderTestBase::InitOwnerSettingsService(Profile* profile) {
+  owner_settings_service_.reset(
+      new chromeos::FakeOwnerSettingsService(profile));
+}
+
+}  // namespace chromeos