Fix for pointer settings when settings page is refreshed.

chrome/browser/chromeos/system/pointer_device_observer.h

Index: chrome/browser/chromeos/system/pointer_device_observer.h
===================================================================
--- chrome/browser/chromeos/system/pointer_device_observer.h	(revision 134877)
+++ chrome/browser/chromeos/system/pointer_device_observer.h	(working copy)
@@ -18,8 +18,12 @@
   PointerDeviceObserver();
   virtual ~PointerDeviceObserver();
 
+  // Start observing device hierarchy.
   void Init();
 
+  // Check for presence of devices.
+  void CheckDevices();
+
   class Observer {
    public:
     virtual void TouchpadExists(bool exists) = 0;
@@ -28,9 +32,6 @@
    protected:
     Observer() {}
     virtual ~Observer();
-
-   private:
-    DISALLOW_COPY_AND_ASSIGN(Observer);
   };
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
@@ -42,13 +43,13 @@
   virtual void DeviceRemoved(int device_id) OVERRIDE {}
   virtual void DeviceKeyPressedOrReleased(int device_id) OVERRIDE {}
 
-  // Check for input devices.
+  // Check for pointer devices.
   void CheckTouchpadExists();
   void CheckMouseExists();
 
-  // Callback for input device checks.
-  void TouchpadExists(bool* exists);
-  void MouseExists(bool* exists);
+  // Callback for pointer device checks.
+  void OnTouchpadExists(bool* exists);
+  void OnMouseExists(bool* exists);
 
   ObserverList<Observer> observers_;