Implement a policy to autologin a public account.

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 "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/command_line.h"
@@ skipping 1178 matching lines @@
 
   is_account_picker_showing_first_time_ = true;
   MaybePreloadAuthExtension();
 
   if (ScreenLocker::default_screen_locker()) {
     content::NotificationService::current()->Notify(
         chrome::NOTIFICATION_LOCK_WEBUI_READY,
         content::NotificationService::AllSources(),
         content::NotificationService::NoDetails());
   }
+
+  if (delegate_)
+    delegate_->OnSigninScreenReady();
 }
 
 void SigninScreenHandler::HandleWallpaperReady(
     const base::ListValue* args) {
   if (ScreenLocker::default_screen_locker()) {
     content::NotificationService::current()->Notify(
         chrome::NOTIFICATION_LOCK_BACKGROUND_DISPLAYED,
         content::NotificationService::AllSources(),
         content::NotificationService::NoDetails());
   }
@@ skipping 368 matching lines @@
   return IsSigninScreen(GetCurrentScreen()) &&
       ui_state_ == UI_STATE_GAIA_SIGNIN;
 }
 
 bool SigninScreenHandler::IsSigninScreenHiddenByError() const {
   return (GetCurrentScreen() == OobeUI::SCREEN_ERROR_MESSAGE) &&
       (IsSigninScreen(error_screen_actor_->parent_screen()));
 }
 
 }  // namespace chromeos