We should switch the keyboard layout to the layout the user set according to

chrome/browser/prefs/browser_prefs.cc

 // 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.
 
 #include "chrome/browser/prefs/browser_prefs.h"
 
 #include "apps/prefs.h"
 #include "base/debug/trace_event.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
@@ skipping 127 matching lines @@
 #include "chrome/browser/chromeos/policy/auto_enrollment_client.h"
 #include "chrome/browser/chromeos/policy/device_cloud_policy_manager_chromeos.h"
 #include "chrome/browser/chromeos/policy/device_status_collector.h"
 #include "chrome/browser/chromeos/power/power_prefs.h"
 #include "chrome/browser/chromeos/preferences.h"
 #include "chrome/browser/chromeos/settings/device_oauth2_token_service.h"
 #include "chrome/browser/chromeos/settings/device_settings_cache.h"
 #include "chrome/browser/chromeos/status/data_promo_notification.h"
 #include "chrome/browser/chromeos/system/automatic_reboot_manager.h"
 #include "chrome/browser/extensions/api/enterprise_platform_keys_private/enterprise_platform_keys_private_api.h"
+#include "chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h"
 #else
 #include "chrome/browser/extensions/default_apps.h"
 #endif
 
 #if defined(USE_ASH)
 #include "chrome/browser/ui/ash/chrome_launcher_prefs.h"
 #endif
 
 #if defined(OS_ANDROID)
 #include "chrome/browser/ui/webui/ntp/android/promo_handler.h"
@@ skipping 97 matching lines @@
   chromeos::DeviceOAuth2TokenService::RegisterPrefs(registry);
   chromeos::device_settings_cache::RegisterPrefs(registry);
   chromeos::default_pinned_apps_field_trial::RegisterPrefs(registry);
   chromeos::language_prefs::RegisterPrefs(registry);
   chromeos::KioskAppManager::RegisterPrefs(registry);
   chromeos::LoginUtils::RegisterPrefs(registry);
   chromeos::Preferences::RegisterPrefs(registry);
   chromeos::proxy_config::RegisterPrefs(registry);
   chromeos::RegisterDisplayLocalStatePrefs(registry);
   chromeos::ServicesCustomizationDocument::RegisterPrefs(registry);
+  chromeos::SigninScreenHandler::RegisterPrefs(registry);
   chromeos::system::AutomaticRebootManager::RegisterPrefs(registry);
   chromeos::UserImageManager::RegisterPrefs(registry);
   chromeos::UserManager::RegisterPrefs(registry);
   chromeos::WallpaperManager::RegisterPrefs(registry);
   chromeos::StartupUtils::RegisterPrefs(registry);
   policy::AutoEnrollmentClient::RegisterPrefs(registry);
   policy::DeviceCloudPolicyManagerChromeOS::RegisterPrefs(registry);
   policy::DeviceStatusCollector::RegisterPrefs(registry);
 #endif
 
@@ skipping 213 matching lines @@
     }
     local_state->ClearPref(prefs::kLastPromptedGoogleURL);
 
     current_version |= GOOGLE_URL_TRACKER_PREFS;
     local_state->SetInteger(prefs::kMultipleProfilePrefMigration,
                             current_version);
   }
 }
 
 }  // namespace chrome