Revert of Delete base/prefs and update callers to use components.

chrome/browser/chromeos/login/wizard_controller_browsertest.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/chromeos/login/wizard_controller.h"
 
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/run_loop.h"
@@ skipping 889 matching lines @@
 
   void SetUpInProcessBrowserTestFixture() override {
     WizardControllerTest::SetUpInProcessBrowserTestFixture();
 
     fake_session_manager_client_ = new FakeSessionManagerClient;
     DBusThreadManager::GetSetterForTesting()->SetSessionManagerClient(
         scoped_ptr<SessionManagerClient>(fake_session_manager_client_));
   }
 
   void SetUpOnMainThread() override {
-    PrefServiceFactory factory;
+    base::PrefServiceFactory factory;
     factory.set_user_prefs(make_scoped_refptr(new PrefStoreStub()));
     local_state_ = factory.Create(new PrefRegistrySimple());
     WizardController::set_local_state_for_testing(local_state_.get());
 
     WizardControllerTest::SetUpOnMainThread();
 
     // Make sure that OOBE is run as an "official" build.
     WizardController::default_controller()->is_official_build_ = true;
   }
 
@@ skipping 299 matching lines @@
 // TODO(merkulova): Add tests for bluetooth HID detection screen variations when
 // UI and logic is ready. http://crbug.com/127016
 
 // TODO(dzhioev): Add tests for controller/host pairing flow.
 // http://crbug.com/375191
 
 static_assert(BaseScreenDelegate::EXIT_CODES_COUNT == 23,
               "tests for new control flow are missing");
 
 }  // namespace chromeos