Fix and re-enable DeviceSettingsCacheTest.

chrome/browser/chromeos/BUILD.gn

 # 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.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//extensions/features/features.gni")
 import("//media/media_options.gni")
 import("//printing/features/features.gni")
 import("//third_party/protobuf/proto_library.gni")
@@ skipping 1533 matching lines @@
     "power/renderer_freezer_unittest.cc",
     "preferences_unittest.cc",
     "printer_detector/printer_detector_unittest.cc",
     "printing/printer_pref_manager_unittest.cc",
     "profiles/profile_list_chromeos_unittest.cc",
     "proxy_config_service_impl_unittest.cc",
     "resource_reporter/resource_reporter_unittest.cc",
     "session_length_limiter_unittest.cc",
     "settings/cros_settings_unittest.cc",
     "settings/device_oauth2_token_service_unittest.cc",
+    "settings/device_settings_cache_unittest.cc",
     "settings/device_settings_provider_unittest.cc",
     "settings/device_settings_service_unittest.cc",
     "settings/install_attributes_unittest.cc",
     "settings/scoped_cros_settings_test_helper.cc",
     "settings/scoped_cros_settings_test_helper.h",
     "settings/session_manager_operation_unittest.cc",
     "settings/shutdown_policy_handler_unittest.cc",
     "settings/stub_cros_settings_provider_unittest.cc",
     "status/data_promo_notification_unittest.cc",
     "system/automatic_reboot_manager_unittest.cc",
@@ skipping 89 matching lines @@
     "policy/proto/chrome_device_policy.proto",
     "policy/proto/install_attributes.proto",
   ]
 }
 
 proto_library("attestation_proto") {
   sources = [
     "attestation/attestation_key_payload.proto",
   ]
 }