chromeos: Add DisplayPowerServiceProvider.

ash/wm/user_activity_detector.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_USER_ACTIVITY_DETECTOR_H_
 #define ASH_WM_USER_ACTIVITY_DETECTOR_H_
 
 #include "ash/ash_export.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/observer_list.h"
 #include "base/time.h"
 #include "ui/base/events/event_handler.h"
 
 namespace ash {
 
 class UserActivityObserver;
 
 // Watches for input events and notifies observers that the user is active.
 class ASH_EXPORT UserActivityDetector : public ui::EventHandler {
  public:
   // Minimum amount of time between notifications to observers.
-  static const double kNotifyIntervalMs;
+  static const int kNotifyIntervalMs;
+
+  // Amount of time that mouse events should be ignored after notification
+  // is received that displays' power states are being changed.
+  static const int kDisplayPowerChangeIgnoreMouseMs;
 
   UserActivityDetector();
   virtual ~UserActivityDetector();
 
   void set_now_for_test(base::TimeTicks now) { now_for_test_ = now; }
 
   bool HasObserver(UserActivityObserver* observer) const;
   void AddObserver(UserActivityObserver* observer);
   void RemoveObserver(UserActivityObserver* observer);
 
-  // Called when chrome has received a request to turn of all displays.
-  void OnAllOutputsTurnedOff();
+  // Called when displays are about to be turned on or off.
+  void OnDisplayPowerChanging();
 
   // ui::EventHandler implementation.
   virtual void OnKeyEvent(ui::KeyEvent* event) OVERRIDE;
   virtual void OnMouseEvent(ui::MouseEvent* event) OVERRIDE;
   virtual void OnScrollEvent(ui::ScrollEvent* event) OVERRIDE;
   virtual void OnTouchEvent(ui::TouchEvent* event) OVERRIDE;
   virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
 
  private:
+  // Returns |now_for_test_| if set or base::TimeTicks::Now() otherwise.
+  base::TimeTicks GetCurrentTime() const;
+
   // Notifies observers if enough time has passed since the last notification.
   void MaybeNotify();
 
   ObserverList<UserActivityObserver> observers_;
 
   // Last time at which we notified observers that the user was active.
   base::TimeTicks last_observer_notification_time_;
 
   // If set, used when the current time is needed.  This can be set by tests to
   // simulate the passage of time.
   base::TimeTicks now_for_test_;
 
-  // When this is true, the next mouse event is ignored. This is to
-  // avoid mis-detecting a mouse enter event that occurs when turning
-  // off display as a user activity.
-  bool ignore_next_mouse_event_;
+  // If set, mouse events will be ignored until this time is reached. This
+  // is to avoid reporting mouse events that occur when displays are turned
+  // on or off as user activity.
+  base::TimeTicks honor_mouse_events_time_;
 
   DISALLOW_COPY_AND_ASSIGN(UserActivityDetector);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_USER_ACTIVITY_DETECTOR_H_