Revert of Tablet-like power button behavior on Convertible/Tablet ChromeOS devices

ash/system/chromeos/power/tablet_power_button_controller.h

-// 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.
-
-#ifndef ASH_SYSTEM_CHROMEOS_POWER_TABLET_POWER_BUTTON_CONTROLLER_H_
-#define ASH_SYSTEM_CHROMEOS_POWER_TABLET_POWER_BUTTON_CONTROLLER_H_
-
-#include <memory>
-
-#include "ash/ash_export.h"
-#include "base/macros.h"
-#include "base/time/tick_clock.h"
-#include "base/time/time.h"
-#include "base/timer/timer.h"
-#include "chromeos/dbus/power_manager_client.h"
-#include "ui/events/devices/input_device_event_observer.h"
-#include "ui/events/event_handler.h"
-
-namespace ash {
-
-class LockStateController;
-
-// Handles power button events on convertible/tablet device. This class is
-// instantiated and used in PowerButtonController.
-class ASH_EXPORT TabletPowerButtonController
-    : public chromeos::PowerManagerClient::Observer,
-      public ui::EventHandler,
-      public ui::InputDeviceEventObserver {
- public:
-  // Helper class used by tablet power button tests to access internal state.
-  class ASH_EXPORT TestApi {
-   public:
-    explicit TestApi(TabletPowerButtonController* controller);
-    ~TestApi();
-
-    // Returns true when |shutdown_timer_| is running.
-    bool ShutdownTimerIsRunning() const;
-
-    // Emulates |shutdown_timer_| timeout.
-    void TriggerShutdownTimeout();
-
-   private:
-    TabletPowerButtonController* controller_;  // Not owned.
-
-    DISALLOW_COPY_AND_ASSIGN(TestApi);
-  };
-
-  explicit TabletPowerButtonController(LockStateController* controller);
-  ~TabletPowerButtonController() override;
-
-  // Returns true if power button events should be handled by this class instead
-  // of PowerButtonController.
-  bool ShouldHandlePowerButtonEvents() const;
-
-  // Handles a power button event.
-  void OnPowerButtonEvent(bool down, const base::TimeTicks& timestamp);
-
-  // Overridden from chromeos::PowerManagerClient::Observer:
-  void PowerManagerRestarted() override;
-  void BrightnessChanged(int level, bool user_initiated) override;
-  void SuspendDone(const base::TimeDelta& sleep_duration) override;
-
-  // Overridden from ui::EventHandler:
-  void OnKeyEvent(ui::KeyEvent* event) override;
-  void OnMouseEvent(ui::MouseEvent* event) override;
-
-  // Overridden from ui::InputDeviceObserver:
-  void OnStylusStateChanged(ui::StylusState state) override;
-
-  // Overrides the tick clock used by |this| for testing.
-  void SetTickClockForTesting(std::unique_ptr<base::TickClock> tick_clock);
-
- private:
-  // Set backlights to |forced_off| if they aren't already.
-  void SetBacklightsForcedOff(bool forced_off);
-
-  // Sends a request to powerd to get the backlights forced off state so that
-  // |backlights_forced_off_| can be initialized.
-  void GetInitialBacklightsForcedOff();
-
-  // Initializes |backlights_forced_off_|.
-  void OnGotInitialBacklightsForcedOff(bool is_forced_off);
-
-  // Starts |shutdown_timer_| when the power button is pressed while in
-  // tablet mode.
-  void StartShutdownTimer();
-
-  // Called by |shutdown_timer_| to start the pre-shutdown animation.
-  void OnShutdownTimeout();
-
-  // Locks the screen if the "require password to wake from sleep" pref is set
-  // and locking is possible.
-  void LockScreenIfRequired();
-
-  // True if the brightness level is currently set to off.
-  bool brightness_level_is_zero_ = false;
-
-  // Current forced-off state of backlights.
-  bool backlights_forced_off_ = false;
-
-  // True if the screen was off when the power button was pressed.
-  bool screen_off_when_power_button_down_ = false;
-
-  // Time source for performed action times.
-  std::unique_ptr<base::TickClock> tick_clock_;
-
-  // Saves the most recent timestamp that powerd is resuming from suspend,
-  // updated in SuspendDone().
-  base::TimeTicks last_resume_time_;
-
-  // Started when the tablet power button is pressed and stopped when it's
-  // released. Runs OnShutdownTimeout() to start shutdown.
-  base::OneShotTimer shutdown_timer_;
-
-  LockStateController* controller_;  // Not owned.
-
-  DISALLOW_COPY_AND_ASSIGN(TabletPowerButtonController);
-};
-
-}  // namespace ash
-
-#endif  // ASH_SYSTEM_CHROMEOS_POWER_TABLET_POWER_BUTTON_CONTROLLER_H_