cros: stop forcing off display when powerd reports SuspendDone

ash/system/power/tablet_power_button_controller.cc

Index: ash/system/power/tablet_power_button_controller.cc
diff --git a/ash/system/power/tablet_power_button_controller.cc b/ash/system/power/tablet_power_button_controller.cc
index 4beeb3e4c26ae88b9ab83dba45320895564a63f0..0f8dea7789afd3a23fe1969591199d46d012e9d3 100644
--- a/ash/system/power/tablet_power_button_controller.cc
+++ b/ash/system/power/tablet_power_button_controller.cc
@@ -159,6 +159,9 @@ void TabletPowerButtonController::BrightnessChanged(int level,
 void TabletPowerButtonController::SuspendDone(
     const base::TimeDelta& sleep_duration) {
   last_resume_time_ = tick_clock_->NowTicks();
+  // Stop forcing backlights off on resume to handle situations where the power
+  // button resumed but we didn't receive the event (crbug.com/735291).
+  SetDisplayForcedOff(false);
 }
 
 void TabletPowerButtonController::LidEventReceived(