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

ui/aura/aura.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 100 matching lines @@
         'window_tree_host_x11.cc',
         'window_tree_host_x11.h',
       ],
       'conditions': [
         ['use_x11==1', {
           'dependencies': [
             '../../build/linux/system.gyp:x11',
             '../../build/linux/system.gyp:xrandr',
             '../../build/linux/system.gyp:xi',
             '../events/devices/events_devices.gyp:events_devices',
+            '../events/devices/x11/events_devices_x11.gyp:events_devices_x11',
             '../events/platform/x11/x11_events_platform.gyp:x11_events_platform',
             '../gfx/x/gfx_x11.gyp:gfx_x11',
           ],
         }],
         ['OS=="win"', {
           'dependencies': [
             '../platform_window/win/win_window.gyp:win_window',
             '../../ipc/ipc.gyp:ipc',
           ],
           'sources!': [
@@ skipping 164 matching lines @@
               'dependencies': [
                 '../../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }