chromeos: Introduce ash::SystemTrayTestApi

ash/system/supervised/tray_supervised_user_unittest.cc

 // Copyright 2014 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 "ash/system/supervised/tray_supervised_user.h"
 
 #include "ash/login_status.h"
 #include "ash/session/session_controller.h"
 #include "ash/shell.h"
 #include "ash/system/tray/label_tray_view.h"
 #include "ash/system/tray/system_tray.h"
+#include "ash/system/tray/system_tray_test_api.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/test_session_controller_client.h"
 #include "ash/test/test_system_tray_delegate.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "ui/message_center/message_center.h"
 #include "ui/message_center/notification.h"
 #include "ui/message_center/notification_list.h"
 #include "ui/message_center/notification_types.h"
 #include "ui/views/view.h"
@@ skipping 70 matching lines @@
   ASSERT_TRUE(notification);
   EXPECT_EQ(
       "Usage and history of this user can be reviewed by the manager "
       "(parent2@test.com) on chrome.com.",
       UTF16ToUTF8(notification->message()));
 }
 
 // Verifies an item is created for a supervised user.
 TEST_F(TraySupervisedUserTest, CreateDefaultView) {
   TraySupervisedUser* tray =
-      GetPrimarySystemTray()->GetTraySupervisedUserForTesting();
+      SystemTrayTestApi(GetPrimarySystemTray()).tray_supervised_user();
   SessionController* session = Shell::Get()->session_controller();
   ASSERT_FALSE(session->IsActiveUserSessionStarted());
 
   // Before login there is no supervised user item.
   const LoginStatus unused = LoginStatus::NOT_LOGGED_IN;
   EXPECT_FALSE(tray->CreateDefaultView(unused));
 
   // Simulate a supervised user logging in.
   test::TestSessionControllerClient* client = GetSessionControllerClient();
   client->Reset();
   client->AddUserSession("child@test.com", user_manager::USER_TYPE_SUPERVISED);
   client->SetSessionState(session_manager::SessionState::ACTIVE);
   mojom::UserSessionPtr user_session = session->GetUserSession(0)->Clone();
   user_session->custodian_email = "parent@test.com";
   session->UpdateUserSession(std::move(user_session));
 
   // Now there is a supervised user item.
   std::unique_ptr<views::View> view =
       base::WrapUnique(tray->CreateDefaultView(unused));
   ASSERT_TRUE(view);
   EXPECT_EQ(
       "Usage and history of this user can be reviewed by the manager "
       "(parent@test.com) on chrome.com.",
       UTF16ToUTF8(static_cast<LabelTrayView*>(view.get())->message()));
 }
 
 }  // namespace ash