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

ui/wm/wm.gyp

 # Copyright 2013 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 73 matching lines @@
         'core/wm_core_switches.cc',
         'core/wm_core_switches.h',
         'core/wm_state.cc',
         'core/wm_state.h',
         'wm_export.h',
       ],
       'conditions': [
         ['use_x11==1', {
           'dependencies': [
             '../../build/linux/system.gyp:x11',
+            '../events/devices/x11/events_devices_x11.gyp:events_devices_x11',
           ],
         }],
       ],
     },
     {
       # GN version: //ui/wm:test_support
       'target_name': 'wm_test_support',
       'type': 'static_library',
       'dependencies': [
         '../../skia/skia.gyp:skia',
@@ skipping 58 matching lines @@
             '../../build/isolate.gypi',
           ],
           'sources': [
             'wm_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }