cros: stop forcing off display when powerd reports SuspendDone

ash/system/power/tablet_power_button_controller.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/power/tablet_power_button_controller.h"
 
 #include "ash/accessibility_delegate.h"
 #include "ash/session/session_controller.h"
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
@@ skipping 141 matching lines @@
 }
 
 void TabletPowerButtonController::BrightnessChanged(int level,
                                                     bool user_initiated) {
   brightness_level_is_zero_ = level == 0;
 }
 
 void TabletPowerButtonController::SuspendDone(
     const base::TimeDelta& sleep_duration) {
   last_resume_time_ = tick_clock_->NowTicks();
+  // Device should always stopped forcing off backlights when suspend is done.
+  // This will handle the case when tablet power button pressed causing system
+  // resuming, but power button event is not delivered.

[Daniel Erat, 2017/06/22 18:08:40]

nit: maybe just something like:

// Stop forcing backlights off on resume to handle situations
// where the power button resumed but we didn't receive the
// event: http://crbug.com/735291

[Qiang(Joe) Xu, 2017/06/22 18:36:35]

Done.

+  SetDisplayForcedOff(false);
 }
 
 void TabletPowerButtonController::LidEventReceived(
     chromeos::PowerManagerClient::LidState state,
     const base::TimeTicks& timestamp) {
   SetDisplayForcedOff(false);
 }
 
 void TabletPowerButtonController::OnMaximizeModeStarted() {
   shutdown_timer_.Stop();
@@ skipping 94 matching lines @@
   SessionController* session_controller = Shell::Get()->session_controller();
   if (session_controller->ShouldLockScreenAutomatically() &&
       session_controller->CanLockScreen() &&
       !session_controller->IsUserSessionBlocked() &&
       !controller_->LockRequested()) {
     session_controller->LockScreen();
   }
 }
 
 }  // namespace ash