ozone: evdev: Add gamepad support

services/ui/public/interfaces/input_devices/input_device_server.mojom

 // Copyright 2016 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.
 
 module ui.mojom;
 
 import "ui/events/devices/mojo/input_devices.mojom";
 
 // Receives updates about changes to input-devices. See InputDeviceServer for
 // the expected behaviour.
 interface InputDeviceObserverMojo {
   // Is called when the list of keyboards changes.
   OnKeyboardDeviceConfigurationChanged(array<ui.mojom.InputDevice> devices);
 
   // Is called when the list of touchscreens changes.
   OnTouchscreenDeviceConfigurationChanged(
       array<ui.mojom.TouchscreenDevice> devices);
 
   // Is called when the list of mice changes.
   OnMouseDeviceConfigurationChanged(array<ui.mojom.InputDevice> devices);
 
   // Is called when the list of touchpads changes.
   OnTouchpadDeviceConfigurationChanged(array<ui.mojom.InputDevice> devices);
 
+  // Is called when the list of gamepads changes.
+  OnGamepadDeviceConfigurationChanged(array<ui.mojom.InputDevice> devices);
+
   // Is called once all of the input-device lists are available. This will
   // always be the first call that an observer receives.
   OnDeviceListsComplete(
       array<ui.mojom.InputDevice> keyboard_devices,
       array<ui.mojom.TouchscreenDevice> touchscreen_devices,
       array<ui.mojom.InputDevice> mouse_devices,
-      array<ui.mojom.InputDevice> touchpad_devices);
+      array<ui.mojom.InputDevice> touchpad_devices,
+      array<ui.mojom.InputDevice> gamepad_devices);
 
   // Is called when a stylus is removed or inserted into the device.
   OnStylusStateChanged(StylusState state);
 };
 
 // Sends updates about input-devices to observers.
 interface InputDeviceServer {
   // Adds an InputDeviceObserverMojo in another process as an observer to get
   // notified of changes to input-devices over Mojo IPC. If all input-device
   // lists are complete when a new observer connects, the implementation will
   // immediately call OnDeviceListsComplete() with the input-device lists. If
   // not, the implementation will wait until all input-device lists are complete
   // then call OnDeviceListsComplete() for all connected observers.
   AddObserver(InputDeviceObserverMojo observer);
 };