mash: Move TrayUpdate to //ash/common

ash/system/tray_update_unittest.cc

-// Copyright 2016 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/tray_update.h"
-
-#include "ash/common/system/tray/wm_system_tray_notifier.h"
-#include "ash/common/wm_shell.h"
-#include "ash/shell.h"
-#include "ash/system/tray/system_tray.h"
-#include "ash/test/ash_test_base.h"
-#include "ash/test/test_system_tray_delegate.h"
-#include "base/macros.h"
-
-namespace ash {
-
-using TrayUpdateTest = test::AshTestBase;
-
-// Tests that the update icon becomes visible when an update becomes
-// available.
-TEST_F(TrayUpdateTest, VisibilityAfterUpdate) {
-  TrayUpdate* tray_update =
-      Shell::GetInstance()->GetPrimarySystemTray()->GetTrayUpdateForTesting();
-
-  // The system starts with no update pending.
-  test::TestSystemTrayDelegate* tray_delegate = GetSystemTrayDelegate();
-  UpdateInfo initial_info;
-  tray_delegate->GetSystemUpdateInfo(&initial_info);
-  EXPECT_FALSE(initial_info.update_required);
-
-  // When no update is pending, the item isn't visible.
-  EXPECT_FALSE(tray_update->tray_view()->visible());
-
-  // Simulate an update.
-  UpdateInfo info;
-  info.update_required = true;
-  WmShell::Get()->system_tray_notifier()->NotifyUpdateRecommended(info);
-
-  // Tray item is now visible.
-  EXPECT_TRUE(tray_update->tray_view()->visible());
-}
-
-}  // namespace ash