chromeos: A little more cleanup for EventRewriter.

chrome/browser/chromeos/system/pointer_device_observer.h

Index: chrome/browser/chromeos/system/pointer_device_observer.h
diff --git a/chrome/browser/chromeos/system/pointer_device_observer.h b/chrome/browser/chromeos/system/pointer_device_observer.h
index 5647ddd907449650869a4546e3806e392ffad6c2..5ea62b988db4e78eeccab05c710972643cba3da7 100644
--- a/chrome/browser/chromeos/system/pointer_device_observer.h
+++ b/chrome/browser/chromeos/system/pointer_device_observer.h
@@ -40,7 +40,6 @@ class PointerDeviceObserver : public DeviceHierarchyObserver {
   virtual void DeviceHierarchyChanged() OVERRIDE;
   virtual void DeviceAdded(int device_id) OVERRIDE {}
   virtual void DeviceRemoved(int device_id) OVERRIDE {}
-  virtual void DeviceKeyPressedOrReleased(int device_id) OVERRIDE {}
 
   // Check for pointer devices.
   void CheckTouchpadExists();