Make PointerDeviceObserver work under Ozone

ui/events/devices/device_data_manager.h

 // 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.
 
 #ifndef UI_EVENTS_DEVICES_DEVICE_DATA_MANAGER_H_
 #define UI_EVENTS_DEVICES_DEVICE_DATA_MANAGER_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 46 matching lines @@
  protected:
   DeviceDataManager();
 
   static DeviceDataManager* instance();
 
   // DeviceHotplugEventObserver:
   void OnTouchscreenDevicesUpdated(
       const std::vector<TouchscreenDevice>& devices) override;
   void OnKeyboardDevicesUpdated(
       const std::vector<KeyboardDevice>& devices) override;
+  void OnMouseDevicesUpdated(
+      const std::vector<InputDevice>& devices) override;
+  void OnTouchpadDevicesUpdated(
+      const std::vector<InputDevice>& devices) override;
 
  private:
   static DeviceDataManager* instance_;
 
   bool IsTouchDeviceIdValid(unsigned int touch_device_id) const;
 
   double touch_radius_scale_map_[kMaxDeviceNum];
 
   // Table to keep track of which display id is mapped to which touch device.
   int64_t touch_device_to_display_map_[kMaxDeviceNum];
   // Index table to find the TouchTransformer for a touch device.
   gfx::Transform touch_device_transformer_map_[kMaxDeviceNum];
 
   std::vector<TouchscreenDevice> touchscreen_devices_;
   std::vector<KeyboardDevice> keyboard_devices_;
 
   ObserverList<InputDeviceEventObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceDataManager);
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_DEVICES_DEVICE_DATA_MANAGER_H_