Split //ui/events/devices into two targets.

ui/events/devices/x11/device_data_manager_x11.h

Index: ui/events/devices/x11/device_data_manager_x11.h
diff --git a/ui/events/devices/x11/device_data_manager_x11.h b/ui/events/devices/x11/device_data_manager_x11.h
index d09cf345cf715106c35d599676978d8eb5cba48f..072378e05687545c9f74a72d6c9e6b6705563f94 100644
--- a/ui/events/devices/x11/device_data_manager_x11.h
+++ b/ui/events/devices/x11/device_data_manager_x11.h
@@ -24,7 +24,7 @@
 #include "base/event_types.h"
 #include "base/macros.h"
 #include "ui/events/devices/device_data_manager.h"
-#include "ui/events/devices/events_devices_export.h"
+#include "ui/events/devices/x11/events_devices_x11_export.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "ui/gfx/geometry/rect.h"
@@ -49,7 +49,8 @@ enum ScrollType {
 
 // A class that extracts and tracks the input events data. It currently handles
 // mouse, touchpad and touchscreen devices.
-class EVENTS_DEVICES_EXPORT DeviceDataManagerX11 : public DeviceDataManager {
+class EVENTS_DEVICES_X11_EXPORT DeviceDataManagerX11
+    : public DeviceDataManager {
  public:
   // Enumerate additional data that one might be interested on an input event,
   // which are usually wrapped in X valuators. If you modify any of this,