chromeos: Ignore power button presses when screen is off.

ash/wm/power_button_controller.h

 // Copyright (c) 2012 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_WM_POWER_BUTTON_CONTROLLER_H_
 #define ASH_WM_POWER_BUTTON_CONTROLLER_H_
 #pragma once
 
 #include "ash/ash_export.h"
 #include "ash/shell_observer.h"
@@ skipping 124 matching lines @@
   virtual ~PowerButtonController();
 
   void set_delegate(PowerButtonControllerDelegate* delegate) {
     delegate_.reset(delegate);
   }
 
   void set_has_legacy_power_button_for_test(bool legacy) {
     has_legacy_power_button_ = legacy;
   }
 
+  // Called when the current screen brightness changes.
+  void OnScreenBrightnessChanged(double percent);
+
   // Called when Chrome gets a request to display the lock screen.
   void OnStartingLock();
 
   // Called when the power or lock buttons are pressed or released.
   void OnPowerButtonEvent(bool down, const base::TimeTicks& timestamp);
   void OnLockButtonEvent(bool down, const base::TimeTicks& timestamp);
 
   // Displays the shutdown animation and requests shutdown when it's done.
   void RequestShutdown();
 
@@ skipping 41 matching lines @@
   // The current login status.
   user::LoginStatus login_status_;
 
   // Original login status during locked.  LOGGED_IN_NONE if it's not locked.
   user::LoginStatus unlocked_login_status_;
 
   // Are the power or lock buttons currently held?
   bool power_button_down_;
   bool lock_button_down_;
 
+  // Is the screen currently turned off?
+  bool screen_is_off_;
+
   // Are we in the process of shutting the machine down?
   bool shutting_down_;
 
   // Should we start |shutdown_timer_| when we receive notification that the
   // screen has been locked?
   bool should_start_shutdown_timer_after_lock_;
 
   // Was a command-line switch set telling us that we're running on hardware
   // that misreports power button releases?
   bool has_legacy_power_button_;
@@ skipping 32 matching lines @@
   // |background_layer_|, as the desktop background is now covering the whole
   // screen.
   base::OneShotTimer<PowerButtonController> hide_background_layer_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(PowerButtonController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_POWER_BUTTON_CONTROLLER_H_