Enable find-missing-symbols-at-link-time for chromeos builds too.

ui/display/display.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 66 matching lines @@
             '../../build/linux/system.gyp:xi',
             '../../build/linux/system.gyp:xrandr',
             '../../ui/events/platform/events_platform.gyp:events_platform',
           ],
         }],
         ['chromeos == 1', {
           'dependencies': [
             'display_types',
           ],
         }],
+        ['chromeos == 1 and use_x11 == 1', {
+          'dependencies': [
+            '../gfx/x/gfx_x11.gyp:gfx_x11',
+          ],
+        }],
         ['use_ozone == 1', {
           'dependencies': [
             '../../ui/ozone/ozone.gyp:ozone',
           ],
         }],
       ],
     },
     {
       # GN version: //ui/display/util
       'target_name': 'display_util',
@@ skipping 103 matching lines @@
             'display',
             'display_test_support',
             'display_test_util',
             'display_types',
           ],
         }],
       ],
     },
   ],
 }