ash: Start shutdown timer on post-resume power button press

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"
@@ skipping 93 matching lines @@
   // 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_;
 
+  // True if power button released should ignore forcing off display.
+  bool ignore_forcing_off_;

[Daniel Erat, 2016/12/05 17:26:00]

this variable name is pretty vague. how about inverting its logic and naming it
|force_off_on_button_up_|, and then setting it to true in the c'tor?

[Qiang(Joe) Xu, 2016/12/05 19:33:58]

Done.

+
   // 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.
 
   base::WeakPtrFactory<TabletPowerButtonController> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TabletPowerButtonController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_CHROMEOS_POWER_TABLET_POWER_BUTTON_CONTROLLER_H_