Remove unused email from install attributes and add support for AD.

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 "ash/common/accessibility_types.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
@@ skipping 704 matching lines @@
   // After warning is skipped, user returns to sign-in screen.
   // And this destroys WizardController.
   OnExit(*mock_wrong_hwid_screen_,
          BaseScreenDelegate::WRONG_HWID_WARNING_SKIPPED);
   EXPECT_FALSE(ExistingUserController::current_controller() == NULL);
 }
 
 class WizardControllerDeviceStateTest : public WizardControllerFlowTest {
  protected:
   WizardControllerDeviceStateTest()
-      : install_attributes_(std::string(),
-                            std::string(),
-                            std::string(),
-                            policy::DEVICE_MODE_NOT_SET) {
+      : install_attributes_(ScopedStubInstallAttributes::CreateUnset()) {
     fake_statistics_provider_.SetMachineStatistic(
         system::kSerialNumberKey, "test");
     fake_statistics_provider_.SetMachineStatistic(
         system::kActivateDateKey, "2000-01");
   }
 
   void SetUpCommandLine(base::CommandLine* command_line) override {
     WizardControllerFlowTest::SetUpCommandLine(command_line);
 
     command_line->AppendSwitchASCII(
@@ skipping 484 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