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

chrome/chrome_browser_ui.gypi

 # Copyright 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': {
     # There are two sections of sources:
     # * "Platform"-based sources (OS, toolkit, etc.)
     # * Feature/directory-based sources (e.g., history, printing)
 
@@ skipping 3274 matching lines @@
                 '../dbus/dbus.gyp:dbus',
               ],
             }],
             # x11 build
             ['use_x11==1', {
               'sources': [ '<@(chrome_browser_ui_x11_sources)' ],
               'dependencies': [
                 '../build/linux/system.gyp:x11',
                 '../build/linux/system.gyp:gio',
                 '../ui/events/devices/events_devices.gyp:events_devices',
+                '../ui/events/devices/x11/events_devices_x11.gyp:events_devices_x11',
               ],
             }],
             ['use_udev==1', {
               'dependencies': [
                 '../device/udev_linux/udev.gyp:udev_linux',
               ],
             }],
           ],
         }],
         ['enable_app_list==1', {
@@ skipping 68 matching lines @@
           ],
           'sources': [
             '<@(chrome_browser_ui_non_mobile_sources)',
             '<@(chrome_browser_ui_omnibox_non_mobile_sources)',
           ],
         }],
       ],
     },
   ],
 }