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

ui/events/devices/events_devices.gyp

Index: ui/events/devices/events_devices.gyp
diff --git a/ui/events/devices/events_devices.gyp b/ui/events/devices/events_devices.gyp
index 1a20ee7d163a17ef7e8940629981bd20eb1b3004..f0e156339193f4f975a0e45b300577e4836e48a7 100644
--- a/ui/events/devices/events_devices.gyp
+++ b/ui/events/devices/events_devices.gyp
@@ -34,25 +34,10 @@
         'keyboard_device.h',
         'touchscreen_device.cc',
         'touchscreen_device.h',
-        'x11/device_data_manager_x11.cc',
-        'x11/device_data_manager_x11.h',
-        'x11/device_list_cache_x11.cc',
-        'x11/device_list_cache_x11.h',
-        'x11/touch_factory_x11.cc',
-        'x11/touch_factory_x11.h',
       ],
       'export_dependent_settings': [
         '../../../ui/gfx/gfx.gyp:gfx',
       ],
-      'conditions': [
-        ['use_x11==1', {
-          'dependencies': [
-            '../../../build/linux/system.gyp:x11',
-            '../../../ui/events/events.gyp:events_base',
-            '../../../ui/gfx/x/gfx_x11.gyp:gfx_x11',
-          ],
-        }],
-      ],
     },
   ],
 }