Remove unused UserSettingsChanged and UpdateGaia.

chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc

 // Copyright (c) 2013 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/ui/webui/chromeos/login/signin_screen_handler.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "ash/shell.h"
@@ skipping 989 matching lines @@
 }
 
 bool SigninScreenHandler::ShouldLoadGaia() const {
   // Fetching of the extension is not started before account picker page is
   // loaded because it can affect the loading speed.
   // Do not load the extension for the screen locker, see crosbug.com/25018.
   return !ScreenLocker::default_screen_locker() &&
          is_account_picker_showing_first_time_;
 }
 
-void SigninScreenHandler::UserSettingsChanged() {
-  DCHECK(gaia_screen_handler_);
-  GaiaContext context;
-  if (delegate_)
-    context.has_users = !delegate_->GetUsers().empty();
-  gaia_screen_handler_->UpdateGaia(context);
-  UpdateAddButtonStatus();
-}
-
 void SigninScreenHandler::UpdateAddButtonStatus() {
   CallJS("cr.ui.login.DisplayManager.updateAddUserButtonStatus",
          AllWhitelistedUsersPresent());
 }
 
 void SigninScreenHandler::HandleAuthenticateUser(const std::string& username,
                                                  const std::string& password) {
   if (!delegate_)
     return;
   UserContext user_context(gaia::SanitizeEmail(username));
@@ skipping 423 matching lines @@
   return gaia_screen_handler_->frame_error();
 }
 
 void SigninScreenHandler::OnCapsLockChanged(bool enabled) {
   caps_lock_enabled_ = enabled;
   if (page_is_ready())
     CallJS("login.AccountPickerScreen.setCapsLockState", caps_lock_enabled_);
 }
 
 }  // namespace chromeos