Fix compilation with enable_supervised_users == 0.

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.
 {
   'variables': {
     'chrome_unit_tests_sources': [
       '../components/autofill/content/renderer/test_password_autofill_agent.cc',
       '../components/autofill/content/renderer/test_password_autofill_agent.h',
       '../components/autofill/content/renderer/test_password_generation_agent.cc',
       '../components/autofill/content/renderer/test_password_generation_agent.h',
@@ skipping 52 matching lines @@
       'browser/component_updater/test/chrome_component_updater_configurator_unittest.cc',
       'browser/component_updater/test/cld_component_installer_unittest.cc',
       'browser/component_updater/test/component_updater_service_unittest.cc',
       'browser/component_updater/test/supervised_user_whitelist_installer_unittest.cc',
       'browser/content_settings/content_settings_default_provider_unittest.cc',
       'browser/content_settings/content_settings_mock_observer.cc',
       'browser/content_settings/content_settings_mock_observer.h',
       'browser/content_settings/content_settings_origin_identifier_value_map_unittest.cc',
       'browser/content_settings/content_settings_policy_provider_unittest.cc',
       'browser/content_settings/content_settings_pref_provider_unittest.cc',
-      'browser/content_settings/content_settings_supervised_provider_unittest.cc',
       'browser/content_settings/content_settings_usages_state_unittest.cc',
       'browser/content_settings/cookie_settings_unittest.cc',
       'browser/content_settings/host_content_settings_map_unittest.cc',
       'browser/content_settings/mock_settings_observer.cc',
       'browser/content_settings/mock_settings_observer.h',
       'browser/content_settings/permission_context_base_unittest.cc',
       'browser/content_settings/permission_queue_controller_unittest.cc',
       'browser/content_settings/tab_specific_content_settings_unittest.cc',
       'browser/custom_handlers/protocol_handler_registry_unittest.cc',
       'browser/devtools/device/webrtc/devtools_bridge_instances_request_unittest.cc',
@@ skipping 1310 matching lines @@
       'utility/media_galleries/pmp_column_reader_unittest.cc',
     ],
     'chrome_unit_tests_themes_sources': [
       'browser/themes/browser_theme_pack_unittest.cc',
       'browser/themes/theme_properties_unittest.cc',
       'browser/themes/theme_service_unittest.cc',
       'browser/themes/theme_syncable_service_unittest.cc',
       'browser/ui/webui/theme_source_unittest.cc',
     ],
     'chrome_unit_tests_supervised_user_sources': [
+      'browser/content_settings/content_settings_supervised_provider_unittest.cc',
       'browser/supervised_user/child_accounts/family_info_fetcher_unittest.cc',
       'browser/supervised_user/child_accounts/permission_request_creator_apiary_unittest.cc',
       'browser/supervised_user/experimental/supervised_user_async_url_checker_unittest.cc',
       'browser/supervised_user/legacy/supervised_user_pref_mapping_service_unittest.cc',
       'browser/supervised_user/legacy/supervised_user_refresh_token_fetcher_unittest.cc',
       'browser/supervised_user/legacy/supervised_user_registration_utility_unittest.cc',
       'browser/supervised_user/legacy/supervised_user_shared_settings_service_unittest.cc',
       'browser/supervised_user/legacy/supervised_user_shared_settings_update_unittest.cc',
       'browser/supervised_user/legacy/supervised_user_sync_service_unittest.cc',
       'browser/supervised_user/supervised_user_bookmarks_handler_unittest.cc',
@@ skipping 1375 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }