Clean up PrefServiceBuilder

chrome/browser/prefs/pref_service_mock_builder.cc

-// Copyright (c) 2012 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/prefs/pref_service_mock_builder.h"
-
-#include "base/prefs/testing_pref_store.h"
-#include "components/user_prefs/pref_registry_syncable.h"
-
-PrefServiceMockBuilder::PrefServiceMockBuilder() {
-  ResetDefaultState();
-}
-
-PrefServiceMockBuilder::~PrefServiceMockBuilder() {}
-
-PrefService* PrefServiceMockBuilder::Create(PrefRegistry* pref_registry) {
-  PrefService* service = PrefServiceBuilder::Create(pref_registry);
-  return service;
-}
-
-PrefServiceSyncable* PrefServiceMockBuilder::CreateSyncable(
-    user_prefs::PrefRegistrySyncable* pref_registry) {
-  PrefServiceSyncable* service =
-      PrefServiceSyncableBuilder::CreateSyncable(pref_registry);
-  return service;
-}
-
-void PrefServiceMockBuilder::ResetDefaultState() {
-  user_prefs_ = new TestingPrefStore;
-}