Clean up PrefServiceBuilder

chrome/browser/prefs/pref_service_mock_factory.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 "android_webview/browser/aw_http_auth_handler_base.h"
+#include "chrome/browser/prefs/pref_service_mock_factory.h"
 
-namespace android_webview {
+#include "base/prefs/testing_pref_store.h"
 
-AwHttpAuthHandlerBase::~AwHttpAuthHandlerBase() {
+PrefServiceMockFactory::PrefServiceMockFactory() {
+    user_prefs_ = new TestingPrefStore;
 }
 
-}  // namespace android_webview
+PrefServiceMockFactory::~PrefServiceMockFactory() {}