chrome/browser/chromeos/login/existing_user_controller.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/chromeos/login/existing_user_controller.h"
   6
   7 #include <vector>
   8
   9 #include "base/bind.h"
  10 #include "base/bind_helpers.h"
  11 #include "base/callback.h"
  12 #include "base/command_line.h"
  13 #include "base/logging.h"
  14 #include "base/memory/scoped_ptr.h"
  15 #include "base/message_loop/message_loop.h"
  16 #include "base/metrics/histogram.h"
  17 #include "base/prefs/pref_service.h"
  18 #include "base/strings/string_util.h"
  19 #include "base/strings/stringprintf.h"
  20 #include "base/strings/utf_string_conversions.h"
  21 #include "base/values.h"
  22 #include "base/version.h"
  23 #include "chrome/browser/accessibility/accessibility_events.h"
  24 #include "chrome/browser/browser_process.h"
  25 #include "chrome/browser/chrome_notification_types.h"
  26 #include "chrome/browser/chromeos/accessibility/accessibility_manager.h"
  27 #include "chrome/browser/chromeos/boot_times_loader.h"
  28 #include "chrome/browser/chromeos/customization_document.h"
  29 #include "chrome/browser/chromeos/first_run/first_run.h"
  30 #include "chrome/browser/chromeos/kiosk_mode/kiosk_mode_settings.h"
  31 #include "chrome/browser/chromeos/login/helper.h"
  32 #include "chrome/browser/chromeos/login/login_display_host.h"
  33 #include "chrome/browser/chromeos/login/login_utils.h"
  34 #include "chrome/browser/chromeos/login/startup_utils.h"
  35 #include "chrome/browser/chromeos/login/user_manager.h"
  36 #include "chrome/browser/chromeos/login/wizard_controller.h"
  37 #include "chrome/browser/chromeos/policy/device_local_account.h"
  38 #include "chrome/browser/chromeos/profiles/profile_helper.h"
  39 #include "chrome/browser/chromeos/settings/cros_settings.h"
  40 #include "chrome/browser/google/google_util.h"
  41 #include "chrome/browser/prefs/session_startup_pref.h"
  42 #include "chrome/common/chrome_switches.h"
  43 #include "chrome/common/chrome_version_info.h"
  44 #include "chrome/common/pref_names.h"
  45 #include "chrome/common/url_constants.h"
  46 #include "chromeos/chromeos_switches.h"
  47 #include "chromeos/dbus/dbus_thread_manager.h"
  48 #include "chromeos/dbus/power_manager_client.h"
  49 #include "chromeos/dbus/session_manager_client.h"
  50 #include "chromeos/settings/cros_settings_names.h"
  51 #include "components/policy/core/common/policy_service.h"
  52 #include "content/public/browser/browser_thread.h"
  53 #include "content/public/browser/notification_service.h"
  54 #include "content/public/browser/notification_types.h"
  55 #include "content/public/browser/user_metrics.h"
  56 #include "google_apis/gaia/gaia_auth_util.h"
  57 #include "google_apis/gaia/google_service_auth_error.h"
  58 #include "grit/generated_resources.h"
  59 #include "net/http/http_auth_cache.h"
  60 #include "net/http/http_network_session.h"
  61 #include "net/http/http_transaction_factory.h"
  62 #include "net/url_request/url_request_context.h"
  63 #include "net/url_request/url_request_context_getter.h"
  64 #include "ui/base/accessibility/accessibility_types.h"
  65 #include "ui/base/l10n/l10n_util.h"
  66 #include "ui/views/widget/widget.h"
  67
  68 namespace chromeos {
  69
  70 namespace {
  71
  72 // URL for account creation.
  73 const char kCreateAccountURL[] =
  74     "https://accounts.google.com/NewAccount?service=mail";
  75
  76 // ChromeVox tutorial URL (used in place of "getting started" url when
  77 // accessibility is enabled).
  78 const char kChromeVoxTutorialURLPattern[] =
  79     "http://www.chromevox.com/tutorial/index.html?lang=%s";
  80
  81 // Delay for transferring the auth cache to the system profile.
  82 const long int kAuthCacheTransferDelayMs = 2000;
  83
  84 // Delay for restarting the ui if safe-mode login has failed.
  85 const long int kSafeModeRestartUiDelayMs = 30000;
  86
  87 // Makes a call to the policy subsystem to reload the policy when we detect
  88 // authentication change.
  89 void RefreshPoliciesOnUIThread() {
  90   if (g_browser_process->policy_service())
  91     g_browser_process->policy_service()->RefreshPolicies(base::Closure());
  92 }
  93
  94 // Copies any authentication details that were entered in the login profile in
  95 // the mail profile to make sure all subsystems of Chrome can access the network
  96 // with the provided authentication which are possibly for a proxy server.
  97 void TransferContextAuthenticationsOnIOThread(
  98     net::URLRequestContextGetter* default_profile_context_getter,
  99     net::URLRequestContextGetter* browser_process_context_getter) {
 100   net::HttpAuthCache* new_cache =
 101       browser_process_context_getter->GetURLRequestContext()->
 102       http_transaction_factory()->GetSession()->http_auth_cache();
 103   net::HttpAuthCache* old_cache =
 104       default_profile_context_getter->GetURLRequestContext()->
 105       http_transaction_factory()->GetSession()->http_auth_cache();
 106   new_cache->UpdateAllFrom(*old_cache);
 107   VLOG(1) << "Main request context populated with authentication data.";
 108   // Last but not least tell the policy subsystem to refresh now as it might
 109   // have been stuck until now too.
 110   content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
 111                                    base::Bind(&RefreshPoliciesOnUIThread));
 112 }
 113
 114 }  // namespace
 115
 116 // static
 117 ExistingUserController* ExistingUserController::current_controller_ = NULL;
 118
 119 ////////////////////////////////////////////////////////////////////////////////
 120 // ExistingUserController, public:
 121
 122 ExistingUserController::ExistingUserController(LoginDisplayHost* host)
 123     : login_status_consumer_(NULL),
 124       host_(host),
 125       login_display_(host_->CreateLoginDisplay(this)),
 126       num_login_attempts_(0),
 127       cros_settings_(CrosSettings::Get()),
 128       weak_factory_(this),
 129       offline_failed_(false),
 130       is_login_in_progress_(false),
 131       password_changed_(false),
 132       do_auto_enrollment_(false),
 133       signin_screen_ready_(false),
 134       network_state_helper_(new login::NetworkStateHelper) {
 135   DCHECK(current_controller_ == NULL);
 136   current_controller_ = this;
 137
 138   registrar_.Add(this,
 139                  chrome::NOTIFICATION_LOGIN_USER_IMAGE_CHANGED,
 140                  content::NotificationService::AllSources());
 141   registrar_.Add(this,
 142                  chrome::NOTIFICATION_USER_LIST_CHANGED,
 143                  content::NotificationService::AllSources());
 144   registrar_.Add(this,
 145                  chrome::NOTIFICATION_AUTH_SUPPLIED,
 146                  content::NotificationService::AllSources());
 147   registrar_.Add(this,
 148                  chrome::NOTIFICATION_SESSION_STARTED,
 149                  content::NotificationService::AllSources());
 150   show_user_names_subscription_ = cros_settings_->AddSettingsObserver(
 151       kAccountsPrefShowUserNamesOnSignIn,
 152       base::Bind(&ExistingUserController::DeviceSettingsChanged,
 153                  base::Unretained(this)));
 154   allow_new_user_subscription_ = cros_settings_->AddSettingsObserver(
 155       kAccountsPrefAllowNewUser,
 156       base::Bind(&ExistingUserController::DeviceSettingsChanged,
 157                  base::Unretained(this)));
 158   allow_guest_subscription_ = cros_settings_->AddSettingsObserver(
 159       kAccountsPrefAllowGuest,
 160       base::Bind(&ExistingUserController::DeviceSettingsChanged,
 161                  base::Unretained(this)));
 162   users_subscription_ = cros_settings_->AddSettingsObserver(
 163       kAccountsPrefUsers,
 164       base::Bind(&ExistingUserController::DeviceSettingsChanged,
 165                  base::Unretained(this)));
 166   local_account_auto_login_id_subscription_ =
 167       cros_settings_->AddSettingsObserver(
 168           kAccountsPrefDeviceLocalAccountAutoLoginId,
 169           base::Bind(&ExistingUserController::ConfigurePublicSessionAutoLogin,
 170                      base::Unretained(this)));
 171   local_account_auto_login_delay_subscription_ =
 172       cros_settings_->AddSettingsObserver(
 173           kAccountsPrefDeviceLocalAccountAutoLoginDelay,
 174           base::Bind(&ExistingUserController::ConfigurePublicSessionAutoLogin,
 175                      base::Unretained(this)));
 176 }
 177
 178 void ExistingUserController::Init(const UserList& users) {
 179   time_init_ = base::Time::Now();
 180   UpdateLoginDisplay(users);
 181   ConfigurePublicSessionAutoLogin();
 182
 183   DBusThreadManager::Get()->GetSessionManagerClient()->EmitLoginPromptReady();
 184 }
 185
 186 void ExistingUserController::UpdateLoginDisplay(const UserList& users) {
 187   bool show_users_on_signin;
 188   UserList filtered_users;
 189
 190   cros_settings_->GetBoolean(kAccountsPrefShowUserNamesOnSignIn,
 191                              &show_users_on_signin);
 192   if (show_users_on_signin) {
 193     for (UserList::const_iterator it = users.begin(); it != users.end(); ++it) {
 194       // TODO(xiyuan): Clean user profile whose email is not in whitelist.
 195       bool meets_locally_managed_requirements =
 196           (*it)->GetType() != User::USER_TYPE_LOCALLY_MANAGED ||
 197           UserManager::Get()->AreLocallyManagedUsersAllowed();
 198       bool meets_whitelist_requirements =
 199           LoginUtils::IsWhitelisted((*it)->email()) ||
 200           (*it)->GetType() != User::USER_TYPE_REGULAR;
 201       if (meets_locally_managed_requirements && meets_whitelist_requirements) {
 202         filtered_users.push_back(*it);
 203       }
 204     }
 205   }
 206
 207   // If no user pods are visible, fallback to single new user pod which will
 208   // have guest session link.
 209   bool show_guest;
 210   cros_settings_->GetBoolean(kAccountsPrefAllowGuest, &show_guest);
 211   bool show_users;
 212   cros_settings_->GetBoolean(kAccountsPrefShowUserNamesOnSignIn, &show_users);
 213   show_guest &= !filtered_users.empty();
 214   bool show_new_user = true;
 215   login_display_->set_parent_window(GetNativeWindow());
 216   login_display_->Init(filtered_users, show_guest, show_users, show_new_user);
 217   host_->OnPreferencesChanged();
 218 }
 219
 220 void ExistingUserController::DoAutoEnrollment() {
 221   do_auto_enrollment_ = true;
 222 }
 223
 224 void ExistingUserController::ResumeLogin() {
 225   // This means the user signed-in, then auto-enrollment used his credentials
 226   // to enroll and succeeded.
 227   resume_login_callback_.Run();
 228   resume_login_callback_.Reset();
 229 }
 230
 231 ////////////////////////////////////////////////////////////////////////////////
 232 // ExistingUserController, content::NotificationObserver implementation:
 233 //
 234
 235 void ExistingUserController::Observe(
 236     int type,
 237     const content::NotificationSource& source,
 238     const content::NotificationDetails& details) {
 239   if (type == chrome::NOTIFICATION_SESSION_STARTED) {
 240     // Stop listening to any notification once session has started.
 241     // Sign in screen objects are marked for deletion with DeleteSoon so
 242     // make sure no object would be used after session has started.
 243     // http://crbug.com/125276
 244     registrar_.RemoveAll();
 245     return;
 246   }
 247   if (type == chrome::NOTIFICATION_USER_LIST_CHANGED) {
 248     DeviceSettingsChanged();
 249     return;
 250   }
 251   if (type == chrome::NOTIFICATION_AUTH_SUPPLIED) {
 252     // Possibly the user has authenticated against a proxy server and we might
 253     // need the credentials for enrollment and other system requests from the
 254     // main |g_browser_process| request context (see bug
 255     // http://crosbug.com/24861). So we transfer any credentials to the global
 256     // request context here.
 257     // The issue we have here is that the NOTIFICATION_AUTH_SUPPLIED is sent
 258     // just after the UI is closed but before the new credentials were stored
 259     // in the profile. Therefore we have to give it some time to make sure it
 260     // has been updated before we copy it.
 261     VLOG(1) << "Authentication was entered manually, possibly for proxyauth.";
 262     scoped_refptr<net::URLRequestContextGetter> browser_process_context_getter =
 263         g_browser_process->system_request_context();
 264     Profile* signin_profile = ProfileHelper::GetSigninProfile();
 265     scoped_refptr<net::URLRequestContextGetter> signin_profile_context_getter =
 266         signin_profile->GetRequestContext();
 267     DCHECK(browser_process_context_getter.get());
 268     DCHECK(signin_profile_context_getter.get());
 269     content::BrowserThread::PostDelayedTask(
 270         content::BrowserThread::IO, FROM_HERE,
 271         base::Bind(&TransferContextAuthenticationsOnIOThread,
 272                    signin_profile_context_getter,
 273                    browser_process_context_getter),
 274         base::TimeDelta::FromMilliseconds(kAuthCacheTransferDelayMs));
 275   }
 276   if (type != chrome::NOTIFICATION_LOGIN_USER_IMAGE_CHANGED)
 277     return;
 278   login_display_->OnUserImageChanged(*content::Details<User>(details).ptr());
 279 }
 280
 281 ////////////////////////////////////////////////////////////////////////////////
 282 // ExistingUserController, private:
 283
 284 ExistingUserController::~ExistingUserController() {
 285   LoginUtils::Get()->DelegateDeleted(this);
 286
 287   if (current_controller_ == this) {
 288     current_controller_ = NULL;
 289   } else {
 290     NOTREACHED() << "More than one controller are alive.";
 291   }
 292   DCHECK(login_display_.get());
 293 }
 294
 295 ////////////////////////////////////////////////////////////////////////////////
 296 // ExistingUserController, LoginDisplay::Delegate implementation:
 297 //
 298
 299 void ExistingUserController::CancelPasswordChangedFlow() {
 300   login_performer_.reset(NULL);
 301   login_display_->SetUIEnabled(true);
 302   StartPublicSessionAutoLoginTimer();
 303 }
 304
 305 void ExistingUserController::CreateAccount() {
 306   content::RecordAction(base::UserMetricsAction("Login.CreateAccount"));
 307   guest_mode_url_ =
 308       google_util::AppendGoogleLocaleParam(GURL(kCreateAccountURL));
 309   LoginAsGuest();
 310 }
 311
 312 void ExistingUserController::CompleteLogin(const UserContext& user_context) {
 313   login_display_->set_signin_completed(true);
 314   if (!host_) {
 315     // Complete login event was generated already from UI. Ignore notification.
 316     return;
 317   }
 318
 319   // Stop the auto-login timer when attempting login.
 320   StopPublicSessionAutoLoginTimer();
 321
 322   // Disable UI while loading user profile.
 323   login_display_->SetUIEnabled(false);
 324
 325   if (!time_init_.is_null()) {
 326     base::TimeDelta delta = base::Time::Now() - time_init_;
 327     UMA_HISTOGRAM_MEDIUM_TIMES("Login.PromptToCompleteLoginTime", delta);
 328     time_init_ = base::Time();  // Reset to null.
 329   }
 330
 331   host_->OnCompleteLogin();
 332
 333   // Do an ownership check now to avoid auto-enrolling if the device has
 334   // already been owned.
 335   DeviceSettingsService::Get()->GetOwnershipStatusAsync(
 336       base::Bind(&ExistingUserController::CompleteLoginInternal,
 337                  weak_factory_.GetWeakPtr(),
 338                  user_context));
 339 }
 340
 341 void ExistingUserController::CompleteLoginInternal(
 342     const UserContext& user_context,
 343     DeviceSettingsService::OwnershipStatus ownership_status) {
 344   // Auto-enrollment must have made a decision by now. It's too late to enroll
 345   // if the protocol isn't done at this point.
 346   if (do_auto_enrollment_ &&
 347       ownership_status == DeviceSettingsService::OWNERSHIP_NONE) {
 348     VLOG(1) << "Forcing auto-enrollment before completing login";
 349     // The only way to get out of the enrollment screen from now on is to either
 350     // complete enrollment, or opt-out of it. So this controller shouldn't force
 351     // enrollment again if it is reused for another sign-in.
 352     do_auto_enrollment_ = false;
 353     auto_enrollment_username_ = user_context.username;
 354     resume_login_callback_ = base::Bind(
 355         &ExistingUserController::PerformLogin,
 356         weak_factory_.GetWeakPtr(),
 357         user_context, LoginPerformer::AUTH_MODE_EXTENSION);
 358     ShowEnrollmentScreen(true, user_context.username);
 359     // Enable UI for the enrollment screen. SetUIEnabled(true) will post a
 360     // request to show the sign-in screen again when invoked at the sign-in
 361     // screen; invoke SetUIEnabled() after navigating to the enrollment screen.
 362     login_display_->SetUIEnabled(true);
 363   } else {
 364     PerformLogin(user_context, LoginPerformer::AUTH_MODE_EXTENSION);
 365   }
 366 }
 367
 368 base::string16 ExistingUserController::GetConnectedNetworkName() {
 369   return network_state_helper_->GetCurrentNetworkName();
 370 }
 371
 372 bool ExistingUserController::IsSigninInProgress() const {
 373   return is_login_in_progress_;
 374 }
 375
 376 void ExistingUserController::Login(const UserContext& user_context) {
 377   if ((user_context.username.empty() || user_context.password.empty()) &&
 378       user_context.auth_code.empty())
 379     return;
 380
 381   // Stop the auto-login timer when attempting login.
 382   StopPublicSessionAutoLoginTimer();
 383
 384   // Disable clicking on other windows.
 385   login_display_->SetUIEnabled(false);
 386
 387   BootTimesLoader::Get()->RecordLoginAttempted();
 388
 389   if (last_login_attempt_username_ != user_context.username) {
 390     last_login_attempt_username_ = user_context.username;
 391     num_login_attempts_ = 0;
 392     // Also reset state variables, which are used to determine password change.
 393     offline_failed_ = false;
 394     online_succeeded_for_.clear();
 395   }
 396   num_login_attempts_++;
 397   PerformLogin(user_context, LoginPerformer::AUTH_MODE_INTERNAL);
 398 }
 399
 400 void ExistingUserController::PerformLogin(
 401     const UserContext& user_context,
 402     LoginPerformer::AuthorizationMode auth_mode) {
 403   UserManager::Get()->GetUserFlow(last_login_attempt_username_)->
 404       set_host(host_);
 405
 406   // Disable UI while loading user profile.
 407   login_display_->SetUIEnabled(false);
 408
 409   // Use the same LoginPerformer for subsequent login as it has state
 410   // such as Authenticator instance.
 411   if (!login_performer_.get() || num_login_attempts_ <= 1) {
 412     LoginPerformer::Delegate* delegate = this;
 413     if (login_performer_delegate_.get())
 414       delegate = login_performer_delegate_.get();
 415     // Only one instance of LoginPerformer should exist at a time.
 416     login_performer_.reset(NULL);
 417     login_performer_.reset(new LoginPerformer(delegate));
 418   }
 419
 420   is_login_in_progress_ = true;
 421   if (gaia::ExtractDomainName(user_context.username) ==
 422           UserManager::kLocallyManagedUserDomain) {
 423     login_performer_->LoginAsLocallyManagedUser(
 424         UserContext(user_context.username,
 425                     user_context.password,
 426                     std::string()));  // auth_code
 427   } else {
 428     login_performer_->PerformLogin(user_context, auth_mode);
 429   }
 430   SendAccessibilityAlert(
 431       l10n_util::GetStringUTF8(IDS_CHROMEOS_ACC_LOGIN_SIGNING_IN));
 432 }
 433
 434 void ExistingUserController::LoginAsRetailModeUser() {
 435   // Stop the auto-login timer when attempting login.
 436   StopPublicSessionAutoLoginTimer();
 437
 438   // Disable clicking on other windows.
 439   login_display_->SetUIEnabled(false);
 440   // TODO(rkc): Add a CHECK to make sure retail mode logins are allowed once
 441   // the enterprise policy wiring is done for retail mode.
 442
 443   // Only one instance of LoginPerformer should exist at a time.
 444   login_performer_.reset(NULL);
 445   login_performer_.reset(new LoginPerformer(this));
 446   is_login_in_progress_ = true;
 447   login_performer_->LoginRetailMode();
 448   SendAccessibilityAlert(
 449       l10n_util::GetStringUTF8(IDS_CHROMEOS_ACC_LOGIN_SIGNIN_DEMOUSER));
 450 }
 451
 452 void ExistingUserController::LoginAsGuest() {
 453   if (is_login_in_progress_ || UserManager::Get()->IsUserLoggedIn())
 454     return;
 455
 456   // Stop the auto-login timer when attempting login.
 457   StopPublicSessionAutoLoginTimer();
 458
 459   // Disable clicking on other windows.
 460   login_display_->SetUIEnabled(false);
 461
 462   CrosSettingsProvider::TrustedStatus status =
 463       cros_settings_->PrepareTrustedValues(
 464           base::Bind(&ExistingUserController::LoginAsGuest,
 465                      weak_factory_.GetWeakPtr()));
 466   // Must not proceed without signature verification.
 467   if (status == CrosSettingsProvider::PERMANENTLY_UNTRUSTED) {
 468     login_display_->ShowError(IDS_LOGIN_ERROR_OWNER_KEY_LOST, 1,
 469                               HelpAppLauncher::HELP_CANT_ACCESS_ACCOUNT);
 470     // Reenable clicking on other windows and status area.
 471     login_display_->SetUIEnabled(true);
 472     StartPublicSessionAutoLoginTimer();
 473     display_email_.clear();
 474     return;
 475   } else if (status != CrosSettingsProvider::TRUSTED) {
 476     // Value of AllowNewUser setting is still not verified.
 477     // Another attempt will be invoked after verification completion.
 478     return;
 479   }
 480
 481   bool allow_guest;
 482   cros_settings_->GetBoolean(kAccountsPrefAllowGuest, &allow_guest);
 483   if (!allow_guest) {
 484     // Disallowed. The UI should normally not show the guest pod but if for some
 485     // reason this has been made available to the user here is the time to tell
 486     // this nicely.
 487     login_display_->ShowError(IDS_LOGIN_ERROR_WHITELIST, 1,
 488                               HelpAppLauncher::HELP_CANT_ACCESS_ACCOUNT);
 489     // Reenable clicking on other windows and status area.
 490     login_display_->SetUIEnabled(true);
 491     StartPublicSessionAutoLoginTimer();
 492     display_email_.clear();
 493     return;
 494   }
 495
 496   // Only one instance of LoginPerformer should exist at a time.
 497   login_performer_.reset(NULL);
 498   login_performer_.reset(new LoginPerformer(this));
 499   is_login_in_progress_ = true;
 500   login_performer_->LoginOffTheRecord();
 501   SendAccessibilityAlert(
 502       l10n_util::GetStringUTF8(IDS_CHROMEOS_ACC_LOGIN_SIGNIN_OFFRECORD));
 503 }
 504
 505 void ExistingUserController::MigrateUserData(const std::string& old_password) {
 506   // LoginPerformer instance has state of the user so it should exist.
 507   if (login_performer_.get())
 508     login_performer_->RecoverEncryptedData(old_password);
 509 }
 510
 511 void ExistingUserController::LoginAsPublicAccount(
 512     const std::string& username) {
 513   if (is_login_in_progress_ || UserManager::Get()->IsUserLoggedIn())
 514     return;
 515
 516   // Stop the auto-login timer when attempting login.
 517   StopPublicSessionAutoLoginTimer();
 518
 519   // Disable clicking on other windows.
 520   login_display_->SetUIEnabled(false);
 521
 522   CrosSettingsProvider::TrustedStatus status =
 523       cros_settings_->PrepareTrustedValues(
 524           base::Bind(&ExistingUserController::LoginAsPublicAccount,
 525                      weak_factory_.GetWeakPtr(),
 526                      username));
 527   // If device policy is permanently unavailable, logging into public accounts
 528   // is not possible.
 529   if (status == CrosSettingsProvider::PERMANENTLY_UNTRUSTED) {
 530     login_display_->ShowError(IDS_LOGIN_ERROR_OWNER_KEY_LOST, 1,
 531                               HelpAppLauncher::HELP_CANT_ACCESS_ACCOUNT);
 532     // Re-enable clicking on other windows.
 533     login_display_->SetUIEnabled(true);
 534     return;
 535   }
 536
 537   // If device policy is not verified yet, this function will be called again
 538   // when verification finishes.
 539   if (status != CrosSettingsProvider::TRUSTED)
 540     return;
 541
 542   // If there is no public account with the given |username|, logging in is not
 543   // possible.
 544   const User* user = UserManager::Get()->FindUser(username);
 545   if (!user || user->GetType() != User::USER_TYPE_PUBLIC_ACCOUNT) {
 546     // Re-enable clicking on other windows.
 547     login_display_->SetUIEnabled(true);
 548     StartPublicSessionAutoLoginTimer();
 549     return;
 550   }
 551
 552   // Only one instance of LoginPerformer should exist at a time.
 553   login_performer_.reset(NULL);
 554   login_performer_.reset(new LoginPerformer(this));
 555   is_login_in_progress_ = true;
 556   login_performer_->LoginAsPublicAccount(username);
 557   SendAccessibilityAlert(
 558       l10n_util::GetStringUTF8(IDS_CHROMEOS_ACC_LOGIN_SIGNIN_PUBLIC_ACCOUNT));
 559 }
 560
 561 void ExistingUserController::LoginAsKioskApp(const std::string& app_id) {
 562   host_->StartAppLaunch(app_id);
 563 }
 564
 565 void ExistingUserController::OnSigninScreenReady() {
 566   signin_screen_ready_ = true;
 567   StartPublicSessionAutoLoginTimer();
 568 }
 569
 570 void ExistingUserController::OnUserSelected(const std::string& username) {
 571   login_performer_.reset(NULL);
 572   num_login_attempts_ = 0;
 573 }
 574
 575 void ExistingUserController::OnStartEnterpriseEnrollment() {
 576   DeviceSettingsService::Get()->GetOwnershipStatusAsync(
 577       base::Bind(&ExistingUserController::OnEnrollmentOwnershipCheckCompleted,
 578                  weak_factory_.GetWeakPtr()));
 579 }
 580
 581 void ExistingUserController::OnStartKioskEnableScreen() {
 582   KioskAppManager::Get()->GetConsumerKioskModeStatus(
 583       base::Bind(&ExistingUserController::OnConsumerKioskModeCheckCompleted,
 584                  weak_factory_.GetWeakPtr()));
 585 }
 586
 587 void ExistingUserController::OnStartDeviceReset() {
 588   ShowResetScreen();
 589 }
 590
 591 void ExistingUserController::OnStartKioskAutolaunchScreen() {
 592   ShowKioskAutolaunchScreen();
 593 }
 594
 595 void ExistingUserController::ResyncUserData() {
 596   // LoginPerformer instance has state of the user so it should exist.
 597   if (login_performer_.get())
 598     login_performer_->ResyncEncryptedData();
 599 }
 600
 601 void ExistingUserController::SetDisplayEmail(const std::string& email) {
 602   display_email_ = email;
 603 }
 604
 605 void ExistingUserController::ShowWrongHWIDScreen() {
 606   scoped_ptr<base::DictionaryValue> params;
 607   host_->StartWizard(WizardController::kWrongHWIDScreenName, params.Pass());
 608   login_display_->OnFadeOut();
 609 }
 610
 611 void ExistingUserController::Signout() {
 612   NOTREACHED();
 613 }
 614
 615 void ExistingUserController::OnConsumerKioskModeCheckCompleted(
 616     KioskAppManager::ConsumerKioskModeStatus status) {
 617   if (status == KioskAppManager::CONSUMER_KIOSK_MODE_CONFIGURABLE)
 618     ShowKioskEnableScreen();
 619 }
 620
 621 void ExistingUserController::OnEnrollmentOwnershipCheckCompleted(
 622     DeviceSettingsService::OwnershipStatus status) {
 623   if (status == DeviceSettingsService::OWNERSHIP_NONE) {
 624     ShowEnrollmentScreen(false, std::string());
 625   } else if (status == DeviceSettingsService::OWNERSHIP_TAKEN) {
 626     // On a device that is already owned we might want to allow users to
 627     // re-enroll if the policy information is invalid.
 628     CrosSettingsProvider::TrustedStatus trusted_status =
 629         CrosSettings::Get()->PrepareTrustedValues(
 630             base::Bind(
 631                 &ExistingUserController::OnEnrollmentOwnershipCheckCompleted,
 632                 weak_factory_.GetWeakPtr(), status));
 633     if (trusted_status == CrosSettingsProvider::PERMANENTLY_UNTRUSTED) {
 634       ShowEnrollmentScreen(false, std::string());
 635     }
 636   } else {
 637     // OwnershipService::GetStatusAsync is supposed to return either
 638     // OWNERSHIP_NONE or OWNERSHIP_TAKEN.
 639     NOTREACHED();
 640   }
 641 }
 642
 643 void ExistingUserController::ShowEnrollmentScreen(bool is_auto_enrollment,
 644                                                   const std::string& user) {
 645   scoped_ptr<base::DictionaryValue> params;
 646   if (is_auto_enrollment) {
 647     params.reset(new base::DictionaryValue());
 648     params->SetBoolean("is_auto_enrollment", true);
 649     params->SetString("user", user);
 650   }
 651   host_->StartWizard(WizardController::kEnrollmentScreenName,
 652                      params.Pass());
 653   login_display_->OnFadeOut();
 654 }
 655
 656 void ExistingUserController::ShowResetScreen() {
 657   scoped_ptr<base::DictionaryValue> params;
 658   host_->StartWizard(WizardController::kResetScreenName, params.Pass());
 659   login_display_->OnFadeOut();
 660 }
 661
 662 void ExistingUserController::ShowKioskEnableScreen() {
 663   scoped_ptr<base::DictionaryValue> params;
 664   host_->StartWizard(WizardController::kKioskEnableScreenName, params.Pass());
 665   login_display_->OnFadeOut();
 666 }
 667
 668 void ExistingUserController::ShowKioskAutolaunchScreen() {
 669   scoped_ptr<base::DictionaryValue> params;
 670   host_->StartWizard(WizardController::kKioskAutolaunchScreenName,
 671                      params.Pass());
 672   login_display_->OnFadeOut();
 673 }
 674
 675 void ExistingUserController::ShowTPMError() {
 676   login_display_->SetUIEnabled(false);
 677   login_display_->ShowErrorScreen(LoginDisplay::TPM_ERROR);
 678 }
 679
 680 ////////////////////////////////////////////////////////////////////////////////
 681 // ExistingUserController, LoginPerformer::Delegate implementation:
 682 //
 683
 684 void ExistingUserController::OnLoginFailure(const LoginFailure& failure) {
 685   is_login_in_progress_ = false;
 686   offline_failed_ = true;
 687
 688   guest_mode_url_ = GURL::EmptyGURL();
 689   std::string error = failure.GetErrorString();
 690
 691   if (UserManager::Get()->GetUserFlow(last_login_attempt_username_)->
 692           HandleLoginFailure(failure)) {
 693     login_display_->SetUIEnabled(true);
 694     return;
 695   }
 696
 697   if (failure.reason() == LoginFailure::OWNER_REQUIRED) {
 698     ShowError(IDS_LOGIN_ERROR_OWNER_REQUIRED, error);
 699     content::BrowserThread::PostDelayedTask(
 700         content::BrowserThread::UI, FROM_HERE,
 701         base::Bind(&SessionManagerClient::StopSession,
 702                    base::Unretained(DBusThreadManager::Get()->
 703                                     GetSessionManagerClient())),
 704         base::TimeDelta::FromMilliseconds(kSafeModeRestartUiDelayMs));
 705   } else if (failure.reason() == LoginFailure::TPM_ERROR) {
 706     ShowTPMError();
 707   } else if (!online_succeeded_for_.empty()) {
 708     ShowGaiaPasswordChanged(online_succeeded_for_);
 709   } else {
 710     // Check networking after trying to login in case user is
 711     // cached locally or the local admin account.
 712     bool is_known_user =
 713         UserManager::Get()->IsKnownUser(last_login_attempt_username_);
 714     if (!network_state_helper_->IsConnected()) {
 715       if (is_known_user)
 716         ShowError(IDS_LOGIN_ERROR_AUTHENTICATING, error);
 717       else
 718         ShowError(IDS_LOGIN_ERROR_OFFLINE_FAILED_NETWORK_NOT_CONNECTED, error);
 719     } else {
 720       // TODO(nkostylev): Cleanup rest of ClientLogin related code.
 721       if (failure.reason() == LoginFailure::NETWORK_AUTH_FAILED &&
 722           failure.error().state() ==
 723               GoogleServiceAuthError::HOSTED_NOT_ALLOWED) {
 724         ShowError(IDS_LOGIN_ERROR_AUTHENTICATING_HOSTED, error);
 725       } else {
 726         if (!is_known_user)
 727           ShowError(IDS_LOGIN_ERROR_AUTHENTICATING_NEW, error);
 728         else
 729           ShowError(IDS_LOGIN_ERROR_AUTHENTICATING, error);
 730       }
 731     }
 732     // Reenable clicking on other windows and status area.
 733     login_display_->SetUIEnabled(true);
 734     login_display_->ClearAndEnablePassword();
 735     StartPublicSessionAutoLoginTimer();
 736   }
 737
 738   // Reset user flow to default, so that special flow will not affect next
 739   // attempt.
 740   UserManager::Get()->ResetUserFlow(last_login_attempt_username_);
 741
 742   if (login_status_consumer_)
 743     login_status_consumer_->OnLoginFailure(failure);
 744
 745   // Clear the recorded displayed email so it won't affect any future attempts.
 746   display_email_.clear();
 747 }
 748
 749 void ExistingUserController::OnLoginSuccess(const UserContext& user_context) {
 750   is_login_in_progress_ = false;
 751   offline_failed_ = false;
 752   login_display_->set_signin_completed(true);
 753
 754   StopPublicSessionAutoLoginTimer();
 755
 756   bool has_cookies =
 757       login_performer_->auth_mode() == LoginPerformer::AUTH_MODE_EXTENSION &&
 758       user_context.auth_code.empty();
 759
 760   // Login performer will be gone so cache this value to use
 761   // once profile is loaded.
 762   password_changed_ = login_performer_->password_changed();
 763
 764   // LoginPerformer instance will delete itself once online auth result is OK.
 765   // In case of failure it'll bring up ScreenLock and ask for
 766   // correct password/display error message.
 767   // Even in case when following online,offline protocol and returning
 768   // requests_pending = false, let LoginPerformer delete itself.
 769   login_performer_->set_delegate(NULL);
 770   ignore_result(login_performer_.release());
 771
 772   // Will call OnProfilePrepared() in the end.
 773   LoginUtils::Get()->PrepareProfile(user_context,
 774                                     display_email_,
 775                                     has_cookies,
 776                                     false,          // Start session for user.
 777                                     this);
 778
 779   display_email_.clear();
 780
 781   // Notify LoginDisplay to allow it provide visual feedback to user.
 782   login_display_->OnLoginSuccess(user_context.username);
 783 }
 784
 785 void ExistingUserController::OnProfilePrepared(Profile* profile) {
 786   // Reenable clicking on other windows and status area.
 787   login_display_->SetUIEnabled(true);
 788
 789   UserManager* user_manager = UserManager::Get();
 790   if (user_manager->IsCurrentUserNew() &&
 791       user_manager->IsLoggedInAsLocallyManagedUser()) {
 792     // Supervised users should launch into empty desktop on first run.
 793     CommandLine::ForCurrentProcess()->AppendSwitch(::switches::kSilentLaunch);
 794   }
 795
 796   if (user_manager->IsCurrentUserNew() &&
 797       !user_manager->GetCurrentUserFlow()->ShouldSkipPostLoginScreens() &&
 798       !WizardController::default_controller()->skip_post_login_screens()) {
 799     // Don't specify start URLs if the administrator has configured the start
 800     // URLs via policy.
 801     if (!SessionStartupPref::TypeIsManaged(profile->GetPrefs()))
 802       InitializeStartUrls();
 803
 804     // Mark the device as registered., i.e. the second part of OOBE as
 805     // completed.
 806     if (!StartupUtils::IsDeviceRegistered())
 807       StartupUtils::MarkDeviceRegistered();
 808
 809     if (CommandLine::ForCurrentProcess()->HasSwitch(
 810           chromeos::switches::kOobeSkipPostLogin)) {
 811       LoginUtils::Get()->DoBrowserLaunch(profile, host_);
 812       host_ = NULL;
 813     } else {
 814       ActivateWizard(WizardController::kTermsOfServiceScreenName);
 815     }
 816   } else {
 817     LoginUtils::Get()->DoBrowserLaunch(profile, host_);
 818     host_ = NULL;
 819   }
 820   // Inform |login_status_consumer_| about successful login.
 821   if (login_status_consumer_)
 822     login_status_consumer_->OnLoginSuccess(UserContext());
 823   login_display_->OnFadeOut();
 824 }
 825
 826 void ExistingUserController::OnOffTheRecordLoginSuccess() {
 827   is_login_in_progress_ = false;
 828   offline_failed_ = false;
 829
 830   // Mark the device as registered., i.e. the second part of OOBE as completed.
 831   if (!StartupUtils::IsDeviceRegistered())
 832     StartupUtils::MarkDeviceRegistered();
 833
 834   LoginUtils::Get()->CompleteOffTheRecordLogin(guest_mode_url_);
 835
 836   if (login_status_consumer_)
 837     login_status_consumer_->OnOffTheRecordLoginSuccess();
 838 }
 839
 840 void ExistingUserController::OnPasswordChangeDetected() {
 841   is_login_in_progress_ = false;
 842   offline_failed_ = false;
 843
 844   // Must not proceed without signature verification.
 845   if (CrosSettingsProvider::TRUSTED != cros_settings_->PrepareTrustedValues(
 846       base::Bind(&ExistingUserController::OnPasswordChangeDetected,
 847                  weak_factory_.GetWeakPtr()))) {
 848     // Value of owner email is still not verified.
 849     // Another attempt will be invoked after verification completion.
 850     return;
 851   }
 852
 853   if (UserManager::Get()->GetUserFlow(last_login_attempt_username_)->
 854           HandlePasswordChangeDetected()) {
 855     return;
 856   }
 857
 858   // True if user has already made an attempt to enter old password and failed.
 859   bool show_invalid_old_password_error =
 860       login_performer_->password_changed_callback_count() > 1;
 861
 862   // Note: We allow owner using "full sync" mode which will recreate
 863   // cryptohome and deal with owner private key being lost. This also allows
 864   // us to recover from a lost owner password/homedir.
 865   // TODO(gspencer): We shouldn't have to erase stateful data when
 866   // doing this.  See http://crosbug.com/9115 http://crosbug.com/7792
 867   login_display_->ShowPasswordChangedDialog(show_invalid_old_password_error);
 868
 869   if (login_status_consumer_)
 870     login_status_consumer_->OnPasswordChangeDetected();
 871
 872   display_email_.clear();
 873 }
 874
 875 void ExistingUserController::WhiteListCheckFailed(const std::string& email) {
 876   is_login_in_progress_ = false;
 877   offline_failed_ = false;
 878
 879   ShowError(IDS_LOGIN_ERROR_WHITELIST, email);
 880
 881   // Reenable clicking on other windows and status area.
 882   login_display_->SetUIEnabled(true);
 883   login_display_->ShowSigninUI(email);
 884
 885   if (login_status_consumer_) {
 886     login_status_consumer_->OnLoginFailure(LoginFailure(
 887           LoginFailure::WHITELIST_CHECK_FAILED));
 888   }
 889
 890   display_email_.clear();
 891
 892   StartPublicSessionAutoLoginTimer();
 893 }
 894
 895 void ExistingUserController::PolicyLoadFailed() {
 896   ShowError(IDS_LOGIN_ERROR_OWNER_KEY_LOST, "");
 897
 898   // Reenable clicking on other windows and status area.
 899   is_login_in_progress_ = false;
 900   offline_failed_ = false;
 901   login_display_->SetUIEnabled(true);
 902
 903   display_email_.clear();
 904
 905   // Policy load failure stops login attempts -- restart the timer.
 906   StartPublicSessionAutoLoginTimer();
 907 }
 908
 909 void ExistingUserController::OnOnlineChecked(const std::string& username,
 910                                              bool success) {
 911   if (success && last_login_attempt_username_ == username) {
 912     online_succeeded_for_ = username;
 913     // Wait for login attempt to end, if it hasn't yet.
 914     if (offline_failed_ && !is_login_in_progress_)
 915       ShowGaiaPasswordChanged(username);
 916   }
 917 }
 918
 919 ////////////////////////////////////////////////////////////////////////////////
 920 // ExistingUserController, private:
 921
 922 void ExistingUserController::DeviceSettingsChanged() {
 923   if (host_ != NULL) {
 924     // Signed settings or user list changed. Notify views and update them.
 925     UpdateLoginDisplay(chromeos::UserManager::Get()->GetUsers());
 926     ConfigurePublicSessionAutoLogin();
 927     return;
 928   }
 929 }
 930
 931 void ExistingUserController::ActivateWizard(const std::string& screen_name) {
 932   scoped_ptr<base::DictionaryValue> params;
 933   host_->StartWizard(screen_name, params.Pass());
 934 }
 935
 936 void ExistingUserController::ConfigurePublicSessionAutoLogin() {
 937   std::string auto_login_account_id;
 938   cros_settings_->GetString(kAccountsPrefDeviceLocalAccountAutoLoginId,
 939                             &auto_login_account_id);
 940   const std::vector<policy::DeviceLocalAccount> device_local_accounts =
 941       policy::GetDeviceLocalAccounts(cros_settings_);
 942
 943   public_session_auto_login_username_.clear();
 944   for (std::vector<policy::DeviceLocalAccount>::const_iterator
 945            it = device_local_accounts.begin();
 946        it != device_local_accounts.end(); ++it) {
 947     if (it->account_id == auto_login_account_id) {
 948       public_session_auto_login_username_ = it->user_id;
 949       break;
 950     }
 951   }
 952
 953   const User* user =
 954       UserManager::Get()->FindUser(public_session_auto_login_username_);
 955   if (!user || user->GetType() != User::USER_TYPE_PUBLIC_ACCOUNT)
 956     public_session_auto_login_username_.clear();
 957
 958   if (!cros_settings_->GetInteger(
 959           kAccountsPrefDeviceLocalAccountAutoLoginDelay,
 960           &public_session_auto_login_delay_)) {
 961     public_session_auto_login_delay_ = 0;
 962   }
 963
 964   if (!public_session_auto_login_username_.empty())
 965     StartPublicSessionAutoLoginTimer();
 966   else
 967     StopPublicSessionAutoLoginTimer();
 968 }
 969
 970 void ExistingUserController::ResetPublicSessionAutoLoginTimer() {
 971   // Only restart the auto-login timer if it's already running.
 972   if (auto_login_timer_ && auto_login_timer_->IsRunning()) {
 973     StopPublicSessionAutoLoginTimer();
 974     StartPublicSessionAutoLoginTimer();
 975   }
 976 }
 977
 978 void ExistingUserController::OnPublicSessionAutoLoginTimerFire() {
 979   CHECK(signin_screen_ready_ &&
 980         !is_login_in_progress_ &&
 981         !public_session_auto_login_username_.empty());
 982   LoginAsPublicAccount(public_session_auto_login_username_);
 983 }
 984
 985 void ExistingUserController::StopPublicSessionAutoLoginTimer() {
 986   if (auto_login_timer_)
 987     auto_login_timer_->Stop();
 988 }
 989
 990 void ExistingUserController::StartPublicSessionAutoLoginTimer() {
 991   if (!signin_screen_ready_ ||
 992       is_login_in_progress_ ||
 993       public_session_auto_login_username_.empty()) {
 994     return;
 995   }
 996
 997   // Start the auto-login timer.
 998   if (!auto_login_timer_)
 999     auto_login_timer_.reset(new base::OneShotTimer<ExistingUserController>);
1000
1001   auto_login_timer_->Start(
1002       FROM_HERE,
1003       base::TimeDelta::FromMilliseconds(
1004           public_session_auto_login_delay_),
1005       base::Bind(
1006           &ExistingUserController::OnPublicSessionAutoLoginTimerFire,
1007           weak_factory_.GetWeakPtr()));
1008 }
1009
1010 gfx::NativeWindow ExistingUserController::GetNativeWindow() const {
1011   return host_->GetNativeWindow();
1012 }
1013
1014 void ExistingUserController::InitializeStartUrls() const {
1015   std::vector<std::string> start_urls;
1016
1017   const base::ListValue *urls;
1018   bool can_show_getstarted_guide = true;
1019   if (UserManager::Get()->IsLoggedInAsDemoUser()) {
1020     if (CrosSettings::Get()->GetList(kStartUpUrls, &urls)) {
1021       // The retail mode user will get start URLs from a special policy if it is
1022       // set.
1023       for (base::ListValue::const_iterator it = urls->begin();
1024            it != urls->end(); ++it) {
1025         std::string url;
1026         if ((*it)->GetAsString(&url))
1027           start_urls.push_back(url);
1028       }
1029     }
1030     can_show_getstarted_guide = false;
1031   // Skip the default first-run behavior for public accounts.
1032   } else if (!UserManager::Get()->IsLoggedInAsPublicAccount()) {
1033     if (AccessibilityManager::Get()->IsSpokenFeedbackEnabled()) {
1034       const char* url = kChromeVoxTutorialURLPattern;
1035       PrefService* prefs = g_browser_process->local_state();
1036       const std::string current_locale =
1037           StringToLowerASCII(prefs->GetString(prefs::kApplicationLocale));
1038       std::string vox_url = base::StringPrintf(url, current_locale.c_str());
1039       start_urls.push_back(vox_url);
1040       can_show_getstarted_guide = false;
1041     }
1042   }
1043
1044   ServicesCustomizationDocument* customization =
1045       ServicesCustomizationDocument::GetInstance();
1046   if (!ServicesCustomizationDocument::WasApplied() &&
1047       customization->IsReady()) {
1048     // Since we don't use OEM start URL anymore, just mark as applied.
1049     customization->ApplyCustomization();
1050   }
1051
1052   // Only show getting started guide for a new user.
1053   const bool should_show_getstarted_guide =
1054       UserManager::Get()->IsCurrentUserNew();
1055
1056   if (can_show_getstarted_guide && should_show_getstarted_guide) {
1057     // Don't open default Chrome window if we're going to launch the first-run
1058     // app. Because we dont' want the first-run app to be hidden in the
1059     // background.
1060     CommandLine::ForCurrentProcess()->AppendSwitch(::switches::kSilentLaunch);
1061     first_run::MaybeLaunchDialogAfterSessionStart();
1062   } else {
1063     for (size_t i = 0; i < start_urls.size(); ++i) {
1064       CommandLine::ForCurrentProcess()->AppendArg(start_urls[i]);
1065     }
1066   }
1067 }
1068
1069 void ExistingUserController::ShowError(int error_id,
1070                                        const std::string& details) {
1071   // TODO(dpolukhin): show detailed error info. |details| string contains
1072   // low level error info that is not localized and even is not user friendly.
1073   // For now just ignore it because error_text contains all required information
1074   // for end users, developers can see details string in Chrome logs.
1075   VLOG(1) << details;
1076   HelpAppLauncher::HelpTopic help_topic_id;
1077   bool is_offline = !network_state_helper_->IsConnected();
1078   switch (login_performer_->error().state()) {
1079     case GoogleServiceAuthError::CONNECTION_FAILED:
1080       help_topic_id = HelpAppLauncher::HELP_CANT_ACCESS_ACCOUNT_OFFLINE;
1081       break;
1082     case GoogleServiceAuthError::ACCOUNT_DISABLED:
1083       help_topic_id = HelpAppLauncher::HELP_ACCOUNT_DISABLED;
1084       break;
1085     case GoogleServiceAuthError::HOSTED_NOT_ALLOWED:
1086       help_topic_id = HelpAppLauncher::HELP_HOSTED_ACCOUNT;
1087       break;
1088     default:
1089       help_topic_id = is_offline ?
1090           HelpAppLauncher::HELP_CANT_ACCESS_ACCOUNT_OFFLINE :
1091           HelpAppLauncher::HELP_CANT_ACCESS_ACCOUNT;
1092       break;
1093   }
1094
1095   login_display_->ShowError(error_id, num_login_attempts_, help_topic_id);
1096 }
1097
1098 void ExistingUserController::ShowGaiaPasswordChanged(
1099     const std::string& username) {
1100   // Invalidate OAuth token, since it can't be correct after password is
1101   // changed.
1102   UserManager::Get()->SaveUserOAuthStatus(
1103       username,
1104       User::OAUTH2_TOKEN_STATUS_INVALID);
1105
1106   login_display_->SetUIEnabled(true);
1107   login_display_->ShowGaiaPasswordChanged(username);
1108 }
1109
1110 void ExistingUserController::SendAccessibilityAlert(
1111     const std::string& alert_text) {
1112   AccessibilityAlertInfo event(ProfileHelper::GetSigninProfile(), alert_text);
1113   SendControlAccessibilityNotification(
1114       ui::AccessibilityTypes::EVENT_VALUE_CHANGED, &event);
1115 }
1116
1117 }  // namespace chromeos