Extract touchscreen device management into a generic manager

ash/touch/touch_hud_debug.cc

Index: ash/touch/touch_hud_debug.cc
diff --git a/ash/touch/touch_hud_debug.cc b/ash/touch/touch_hud_debug.cc
index 20fab48588522cc2e61bc44186ee2d6108a32583..363b4794cc9e5a9286a220f6608668184d658772 100644
--- a/ash/touch/touch_hud_debug.cc
+++ b/ash/touch/touch_hud_debug.cc
@@ -27,7 +27,7 @@
 #include <X11/extensions/XInput2.h>
 #include <X11/Xlib.h>
 
-#include "ui/events/x/device_data_manager.h"
+#include "ui/events/x/device_data_manager_x11.h"
 #endif
 
 namespace ash {
@@ -73,10 +73,10 @@ int GetTrackingId(const ui::TouchEvent& event) {
   if (!event.HasNativeEvent())
     return 0;
 #if defined(USE_XI2_MT)
-  ui::DeviceDataManager* manager = ui::DeviceDataManager::GetInstance();
+  ui::DeviceDataManagerX11* manager = ui::DeviceDataManagerX11::GetInstance();
   double tracking_id;
   if (manager->GetEventData(*event.native_event(),
-                            ui::DeviceDataManager::DT_TOUCH_TRACKING_ID,
+                            ui::DeviceDataManagerX11::DT_TOUCH_TRACKING_ID,
                             &tracking_id)) {
     return static_cast<int>(tracking_id);
   }