Depend on xdisplaycheck when use_x11==1, not when toolkit_uses_gtk==1

chrome/chrome_tests_unit.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.
 {
   'targets': [
     {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': 'static_library',
@@ skipping 1901 matching lines @@
             'browser/policy/auto_enrollment_client_unittest.cc' ,
             'browser/policy/cros_user_policy_cache_unittest.cc',
             'browser/policy/device_policy_cache_unittest.cc',
             'browser/policy/device_local_account_policy_service_unittest.cc',
             'browser/policy/device_status_collector_unittest.cc',
             'browser/policy/enterprise_install_attributes_unittest.cc',
             'browser/policy/network_configuration_updater_unittest.cc',
             'browser/policy/proxy_policy_provider_unittest.cc',
           ],
         }],
+        ['use_x11==1', {
+          'dependencies': [
+            '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
+          ],
+        }],
         ['toolkit_uses_gtk == 1', {
           'conditions': [
             ['selinux==0', {
               'dependencies': [
                 '../sandbox/sandbox.gyp:*',
               ],
             }],
             ['toolkit_views==1', {
               'sources!': [
                 'browser/ui/gtk/accelerators_gtk_unittest.cc',
@@ skipping 14 matching lines @@
                     '../build/linux/system.gyp:gnome_keyring_direct',
                   ],
                 }],
               ],
             }],
           ],
           'dependencies': [
             '../build/linux/system.gyp:dbus',
             '../build/linux/system.gyp:gtk',
             '../dbus/dbus.gyp:dbus_test_support',
-            '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
           ],
           'sources!': [
             'browser/printing/print_job_unittest.cc',
           ],
         }, { # else: toolkit_uses_gtk != 1
           'sources!': [
             'browser/ui/gtk/tabs/tab_renderer_gtk_unittest.cc',
             '../ui/views/focus/accelerator_handler_gtk_unittest.cc',
           ],
         }],
@@ skipping 415 matching lines @@
               # more details.
               'DebugInformationFormat': '3',
               'ProgramDataBaseFileName': '<(PRODUCT_DIR)/unit_tests.exe.pdb',
             },
           },
         },
       ],
     }],
   ],  # 'conditions'
 }