Make PointerDeviceObserver work under Ozone

ui/events/devices/device_data_manager.cc

Index: ui/events/devices/device_data_manager.cc
diff --git a/ui/events/devices/device_data_manager.cc b/ui/events/devices/device_data_manager.cc
index 0977395e18ef1c64536115dca3093b32e1d522a7..eb96c46478924f00385b6a865bb33b1580ac7411 100644
--- a/ui/events/devices/device_data_manager.cc
+++ b/ui/events/devices/device_data_manager.cc
@@ -149,6 +149,20 @@ void DeviceDataManager::OnKeyboardDevicesUpdated(
                     OnKeyboardDeviceConfigurationChanged());
 }
 
+void DeviceDataManager::OnMouseDevicesUpdated(
+    const std::vector<InputDevice>& devices) {
+  FOR_EACH_OBSERVER(InputDeviceEventObserver,
+                    observers_,
+                    OnMouseDeviceConfigurationChanged());
+}
+
+void DeviceDataManager::OnTouchpadDevicesUpdated(
+    const std::vector<InputDevice>& devices) {
+  FOR_EACH_OBSERVER(InputDeviceEventObserver,
+                    observers_,
+                    OnTouchpadDeviceConfigurationChanged());
+}
+
 void DeviceDataManager::AddObserver(InputDeviceEventObserver* observer) {
   observers_.AddObserver(observer);
 }