Make PointerDeviceObserver work under Ozone

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 51ce2a8c785c17bea80a140458856ab85d6857e4..b5911cb601678af8cbd4d14cba3843d090653ad1 100644
--- a/chrome/browser/chromeos/system/pointer_device_observer.h
+++ b/chrome/browser/chromeos/system/pointer_device_observer.h
@@ -8,11 +8,13 @@
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "chrome/browser/chromeos/device_hierarchy_observer.h"
+#include "ui/events/devices/input_device_event_observer.h"
 
 namespace chromeos {
 namespace system {
 
-class PointerDeviceObserver : public DeviceHierarchyObserver {
+class PointerDeviceObserver : public DeviceHierarchyObserver,
+                              public ui::InputDeviceEventObserver {
  public:
   PointerDeviceObserver();
   ~PointerDeviceObserver() override;
@@ -36,11 +38,17 @@ class PointerDeviceObserver : public DeviceHierarchyObserver {
   void RemoveObserver(Observer* observer);
 
  private:
-  // DeviceHierarchyObserver implementation.
+  // DeviceHierarchyObserver:
   void DeviceHierarchyChanged() override;
   void DeviceAdded(int device_id) override {}
   void DeviceRemoved(int device_id) override {}
 
+  // InputDeviceEventObserver:
+  void OnTouchscreenDeviceConfigurationChanged() override {}
+  void OnKeyboardDeviceConfigurationChanged() override {}
+  void OnMouseDeviceConfigurationChanged() override;
+  void OnTouchpadDeviceConfigurationChanged() override;
+
   // Check for pointer devices.
   void CheckTouchpadExists();
   void CheckMouseExists();