Tame the proliferation of UserContext constructors

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 "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/path_service.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
@@ skipping 488 matching lines @@
   MockConsumer mock_consumer;
 
   // Must have a pending signin to resume after auto-enrollment:
   LoginDisplayHostImpl::default_host()->StartSignInScreen(LoginScreenContext());
   EXPECT_FALSE(ExistingUserController::current_controller() == NULL);
   ExistingUserController::current_controller()->DoAutoEnrollment();
   ExistingUserController::current_controller()->set_login_status_consumer(
       &mock_consumer);
   // This calls StartWizard, destroying the current controller() and its mocks;
   // don't set expectations on those objects.
-  ExistingUserController::current_controller()->CompleteLogin(
-      UserContext(kUsername, kPassword, ""));
+  UserContext user_context(kUsername);
+  user_context.SetPassword(kPassword);
+  ExistingUserController::current_controller()->CompleteLogin(user_context);
   // Run the tasks posted to complete the login:
   base::MessageLoop::current()->RunUntilIdle();
 
   EnrollmentScreen* screen =
       WizardController::default_controller()->GetEnrollmentScreen();
   EXPECT_EQ(screen, WizardController::default_controller()->current_screen());
   // This is the main expectation: after auto-enrollment, login is resumed.
   EXPECT_CALL(mock_consumer, OnLoginSuccess(_)).Times(1);
   OnExit(ScreenObserver::ENTERPRISE_AUTO_MAGIC_ENROLLMENT_COMPLETED);
   // Prevent browser launch when the profile is prepared:
@@ skipping 321 matching lines @@
 
 // TODO(nkostylev): Add test for WebUI accelerators http://crosbug.com/22571
 
 // TODO(merkulova): Add tests for bluetooth HID detection screen variations when
 // UI and logic is ready. http://crbug.com/127016
 
 COMPILE_ASSERT(ScreenObserver::EXIT_CODES_COUNT == 21,
                add_tests_for_new_control_flow_you_just_introduced);
 
 }  // namespace chromeos