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

ui/events/devices/events_devices.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 16 matching lines @@
         'device_util_linux.cc',
         'device_util_linux.h',
         'events_devices_export.h',
         'input_device.cc',
         'input_device.h',
         'input_device_event_observer.h',
         'keyboard_device.cc',
         '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',
-          ],
-        }],
-      ],
     },
   ],
 }