Extract touchscreen device management into a generic manager

ui/events/x/device_list_cache_x.cc

 // Copyright (c) 2012 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/x/device_list_cache_x.h"
 
 #include <algorithm>
 
 #include "base/memory/singleton.h"
 #include "base/message_loop/message_loop.h"
-#include "ui/events/x/device_data_manager.h"
+#include "ui/events/x/device_data_manager_x11.h"
 
 namespace {
 
 bool IsXI2Available() {
 #if defined(USE_AURA)
-  return ui::DeviceDataManager::GetInstance()->IsXInput2Available();
+  return ui::DeviceDataManagerX11::GetInstance()->IsXInput2Available();
 #else
   return false;
 #endif
 }
 
 }
 
 namespace ui {
 
 DeviceListCacheX::DeviceListCacheX() {
@@ skipping 41 matching lines @@
   XIDeviceList& xi_dev_list = xi_dev_list_map_[display];
   if (!xi_dev_list.devices && !xi_dev_list.count) {
     xi_dev_list.devices = XIQueryDevice(display, XIAllDevices,
                                        &xi_dev_list.count);
   }
   return xi_dev_list;
 }
 
 }  // namespace ui