mash: Convert system tray logout button to wm common types

ash/system/chromeos/session/logout_confirmation_controller.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/chromeos/session/logout_confirmation_controller.h"
-
-#include <utility>
-
-#include "ash/common/wm_shell.h"
-#include "ash/system/chromeos/session/logout_confirmation_dialog.h"
-#include "base/location.h"
-#include "base/time/default_tick_clock.h"
-#include "base/time/tick_clock.h"
-#include "ui/views/widget/widget.h"
-
-namespace ash {
-
-LogoutConfirmationController::LogoutConfirmationController(
-    const base::Closure& logout_closure)
-    : clock_(new base::DefaultTickClock),
-      logout_closure_(logout_closure),
-      dialog_(NULL),
-      logout_timer_(false, false) {
-  if (WmShell::HasInstance())
-    WmShell::Get()->AddShellObserver(this);
-}
-
-LogoutConfirmationController::~LogoutConfirmationController() {
-  if (WmShell::HasInstance())
-    WmShell::Get()->RemoveShellObserver(this);
-  if (dialog_)
-    dialog_->ControllerGone();
-}
-
-void LogoutConfirmationController::ConfirmLogout(base::TimeTicks logout_time) {
-  if (!logout_time_.is_null() && logout_time >= logout_time_) {
-    // If a confirmation dialog is already being shown and its countdown expires
-    // no later than the |logout_time| requested now, keep the current dialog
-    // open.
-    return;
-  }
-  logout_time_ = logout_time;
-
-  if (!dialog_) {
-    // Show confirmation dialog unless this is a unit test without a Shell.
-    if (WmShell::HasInstance())
-      dialog_ = new LogoutConfirmationDialog(this, logout_time_);
-  } else {
-    dialog_->Update(logout_time_);
-  }
-
-  logout_timer_.Start(FROM_HERE, logout_time_ - clock_->NowTicks(),
-                      logout_closure_);
-}
-
-void LogoutConfirmationController::SetClockForTesting(
-    std::unique_ptr<base::TickClock> clock) {
-  clock_ = std::move(clock);
-}
-
-void LogoutConfirmationController::OnLockStateChanged(bool locked) {
-  if (!locked || logout_time_.is_null())
-    return;
-
-  // If the screen is locked while a confirmation dialog is being shown, close
-  // the dialog.
-  logout_time_ = base::TimeTicks();
-  if (dialog_)
-    dialog_->GetWidget()->Close();
-  logout_timer_.Stop();
-}
-
-void LogoutConfirmationController::OnLogoutConfirmed() {
-  logout_timer_.Stop();
-  logout_closure_.Run();
-}
-
-void LogoutConfirmationController::OnDialogClosed() {
-  logout_time_ = base::TimeTicks();
-  dialog_ = NULL;
-  logout_timer_.Stop();
-}
-
-}  // namespace ash