Make PointerDeviceObserver work under Ozone

ui/events/ozone/evdev/event_factory_evdev.cc

 // Copyright 2014 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.
 
 #include "ui/events/ozone/evdev/event_factory_evdev.h"
 
 #include "base/bind.h"
 #include "base/task_runner.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/threading/worker_pool.h"
@@ skipping 236 matching lines @@
 void EventFactoryEvdev::DispatchTouchscreenDevicesUpdated(
     const std::vector<TouchscreenDevice>& devices) {
   DeviceHotplugEventObserver* observer = DeviceDataManager::GetInstance();
   observer->OnTouchscreenDevicesUpdated(devices);
 }
 
 void EventFactoryEvdev::DispatchMouseDevicesUpdated(
     const std::vector<InputDevice>& devices) {
   // There's no list of mice in DeviceDataManager.
   input_controller_.set_has_mouse(devices.size() != 0);
+  DeviceHotplugEventObserver* observer = DeviceDataManager::GetInstance();
+  observer->OnMouseDevicesUpdated(devices);
 }
 
 void EventFactoryEvdev::DispatchTouchpadDevicesUpdated(
     const std::vector<InputDevice>& devices) {
   // There's no list of touchpads in DeviceDataManager.
   input_controller_.set_has_touchpad(devices.size() != 0);
+  DeviceHotplugEventObserver* observer = DeviceDataManager::GetInstance();
+  observer->OnTouchpadDevicesUpdated(devices);
 }
 
 
 void EventFactoryEvdev::OnDeviceEvent(const DeviceEvent& event) {
   if (event.device_type() != DeviceEvent::INPUT)
     return;
 
   switch (event.action_type()) {
     case DeviceEvent::ADD:
     case DeviceEvent::CHANGE: {
@@ skipping 48 matching lines @@
 
   // TODO(spang): This settings interface is really broken. crbug.com/450899
   input_controller_.SetInputDeviceFactory(input_device_factory_proxy_.get());
 
   // Scan & monitor devices.
   device_manager_->AddObserver(this);
   device_manager_->ScanDevices(this);
 }
 
 }  // namespace ui