chromeos: Add settings to control power management prefs.

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 1788 matching lines @@
     "../../common/extensions/api/file_browser_handlers/file_browser_handler_manifest_unittest.cc",
     "../../common/extensions/api/file_system_provider/file_system_provider_handler_unittest.cc",
     "../ui/views/frame/immersive_mode_controller_ash_unittest.cc",
     "../ui/views/intent_picker_bubble_view_unittest.cc",
     "../ui/views/select_file_dialog_extension_unittest.cc",
     "../ui/webui/chromeos/login/l10n_util_test_util.cc",
     "../ui/webui/chromeos/login/l10n_util_test_util.h",
     "../ui/webui/chromeos/login/l10n_util_unittest.cc",
     "../ui/webui/chromeos/login/oobe_display_chooser_unittest.cc",
     "../ui/webui/chromeos/login/signin_userlist_unittest.cc",
+    "../ui/webui/settings/chromeos/device_power_handler_unittest.cc",
     "../ui/webui/settings/chromeos/easy_unlock_settings_handler_unittest.cc",
     "//components/drive/change_list_loader_unittest.cc",
     "//components/drive/change_list_processor_unittest.cc",
     "//components/drive/chromeos/file_cache_unittest.cc",
     "//components/drive/directory_loader_unittest.cc",
     "//components/drive/fake_file_system_unittest.cc",
     "//components/drive/file_change_unittest.cc",
     "//components/drive/file_system/copy_operation_unittest.cc",
     "//components/drive/file_system/create_directory_operation_unittest.cc",
     "//components/drive/file_system/create_file_operation_unittest.cc",
@@ skipping 64 matching lines @@
     "policy/proto/chrome_device_policy.proto",
     "policy/proto/install_attributes.proto",
   ]
 }
 
 proto_library("attestation_proto") {
   sources = [
     "attestation/attestation_key_payload.proto",
   ]
 }