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

chrome/common/pref_names.cc

 // Copyright (c) 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/common/pref_names.h"
 
 #include "base/basictypes.h"
 #include "chrome/common/pref_font_webkit_names.h"
 
 namespace prefs {
@@ skipping 2102 matching lines @@
     "device_robot_refresh_token.any-api";
 
 // Device requisition for enterprise enrollment.
 const char kDeviceEnrollmentRequisition[] = "enrollment.device_requisition";
 
 // Whether to automatically start the enterprise enrollment step during OOBE.
 const char kDeviceEnrollmentAutoStart[] = "enrollment.auto_start";
 
 // Whether the user may exit enrollment.
 const char kDeviceEnrollmentCanExit[] = "enrollment.can_exit";
+
+// Dictionary of per-user Least Recently Used input method (used at login
+// screen).
+extern const char kUsersLRUInputMethod[] = "UsersLRUInputMethod";
 #endif
 
 // Whether there is a Flash version installed that supports clearing LSO data.
 const char kClearPluginLSODataEnabled[] = "browser.clear_lso_data_enabled";
 
 // Whether we should show Pepper Flash-specific settings.
 const char kPepperFlashSettingsEnabled[] =
     "browser.pepper_flash_settings_enabled";
 
 // String which specifies where to store the disk cache.
@@ skipping 364 matching lines @@
 
 // How often the bubble has been shown.
 extern const char kModuleConflictBubbleShown[] = "module_conflict.bubble_shown";
 
 // A string pref for storing the salt used to compute the pepper device ID.
 const char kDRMSalt[] = "settings.privacy.drm_salt";
 // A boolean pref that enables the (private) pepper GetDeviceID() call.
 const char kEnableDRM[] = "settings.privacy.drm_enabled";
 
 }  // namespace prefs