cros: Replace WizardController string constants with OobeScreen values.

chrome/browser/ui/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/chromecast_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 262 matching lines @@
     "webui/chromeos/login/l10n_util.cc",
     "webui/chromeos/login/l10n_util.h",
     "webui/chromeos/login/network_dropdown.cc",
     "webui/chromeos/login/network_dropdown.h",
     "webui/chromeos/login/network_dropdown_handler.cc",
     "webui/chromeos/login/network_dropdown_handler.h",
     "webui/chromeos/login/network_screen_handler.cc",
     "webui/chromeos/login/network_screen_handler.h",
     "webui/chromeos/login/network_state_informer.cc",
     "webui/chromeos/login/network_state_informer.h",
-    "webui/chromeos/login/oobe_screen.cc",
-    "webui/chromeos/login/oobe_screen.h",
     "webui/chromeos/login/oobe_ui.cc",
     "webui/chromeos/login/oobe_ui.h",
     "webui/chromeos/login/reset_screen_handler.cc",
     "webui/chromeos/login/reset_screen_handler.h",
     "webui/chromeos/login/screenlock_icon_provider.cc",
     "webui/chromeos/login/screenlock_icon_provider.h",
     "webui/chromeos/login/screenlock_icon_source.cc",
     "webui/chromeos/login/screenlock_icon_source.h",
     "webui/chromeos/login/signin_screen_handler.cc",
     "webui/chromeos/login/signin_screen_handler.h",
@@ skipping 3189 matching lines @@
       "test/test_confirm_bubble_model.cc",
       "test/test_confirm_bubble_model.h",
     ]
     deps += [ "//chrome/test:test_support_ui" ]
   }
 
   if (enable_extensions) {
     deps += [ "//extensions/browser" ]
   }
 }