src/chrome/browser/chromeos/login/managed/locally_managed_user_creation_screen.cc

   1 // Copyright (c) 2013 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/managed/locally_managed_user_creation_screen.h"
   6
   7 #include "ash/desktop_background/desktop_background_controller.h"
   8 #include "ash/shell.h"
   9 #include "base/command_line.h"
  10 #include "base/rand_util.h"
  11 #include "base/values.h"
  12 #include "chrome/browser/chromeos/camera_detector.h"
  13 #include "chrome/browser/chromeos/login/existing_user_controller.h"
  14 #include "chrome/browser/chromeos/login/managed/managed_user_creation_controller.h"
  15 #include "chrome/browser/chromeos/login/managed/managed_user_creation_controller_new.h"
  16 #include "chrome/browser/chromeos/login/managed/managed_user_creation_controller_old.h"
  17 #include "chrome/browser/chromeos/login/managed/supervised_user_authentication.h"
  18 #include "chrome/browser/chromeos/login/screens/error_screen.h"
  19 #include "chrome/browser/chromeos/login/screens/screen_observer.h"
  20 #include "chrome/browser/chromeos/login/supervised_user_manager.h"
  21 #include "chrome/browser/chromeos/login/user_image.h"
  22 #include "chrome/browser/chromeos/login/user_image_manager.h"
  23 #include "chrome/browser/chromeos/login/wizard_controller.h"
  24 #include "chrome/browser/managed_mode/managed_user_sync_service.h"
  25 #include "chrome/browser/managed_mode/managed_user_sync_service_factory.h"
  26 #include "chrome/common/chrome_switches.h"
  27 #include "chromeos/network/network_state.h"
  28 #include "content/public/browser/browser_thread.h"
  29 #include "grit/generated_resources.h"
  30 #include "third_party/skia/include/core/SkBitmap.h"
  31 #include "ui/base/l10n/l10n_util.h"
  32 #include "ui/gfx/image/image_skia.h"
  33
  34 namespace chromeos {
  35
  36 namespace {
  37
  38 // Key for (boolean) value that indicates that user already exists on device.
  39 const char kUserExists[] = "exists";
  40 // Key for  value that indicates why user can not be imported.
  41 const char kUserConflict[] = "conflict";
  42 // User is already imported.
  43 const char kUserConflictImported[] = "imported";
  44 // There is another supervised user with same name.
  45 const char kUserConflictName[] = "name";
  46
  47 const char kUserNeedPassword[] = "needPassword";
  48
  49 const char kAvatarURLKey[] = "avatarurl";
  50 const char kRandomAvatarKey[] = "randomAvatar";
  51 const char kNameOfIntroScreen[] = "intro";
  52 const char kNameOfNewUserParametersScreen[] = "username";
  53
  54 void ConfigureErrorScreen(ErrorScreen* screen,
  55     const NetworkState* network,
  56     const NetworkPortalDetector::CaptivePortalStatus status) {
  57   switch (status) {
  58     case NetworkPortalDetector::CAPTIVE_PORTAL_STATUS_UNKNOWN:
  59     case NetworkPortalDetector::CAPTIVE_PORTAL_STATUS_ONLINE:
  60       NOTREACHED();
  61       break;
  62     case NetworkPortalDetector::CAPTIVE_PORTAL_STATUS_OFFLINE:
  63       screen->SetErrorState(ErrorScreen::ERROR_STATE_OFFLINE,
  64                             std::string());
  65       break;
  66     case NetworkPortalDetector::CAPTIVE_PORTAL_STATUS_PORTAL:
  67       screen->SetErrorState(ErrorScreen::ERROR_STATE_PORTAL,
  68                             network ? network->name() : std::string());
  69       screen->FixCaptivePortal();
  70       break;
  71     case NetworkPortalDetector::CAPTIVE_PORTAL_STATUS_PROXY_AUTH_REQUIRED:
  72       screen->SetErrorState(ErrorScreen::ERROR_STATE_PROXY,
  73                             std::string());
  74       break;
  75     default:
  76       NOTREACHED();
  77       break;
  78   }
  79 }
  80
  81 } // namespace
  82
  83 LocallyManagedUserCreationScreen::LocallyManagedUserCreationScreen(
  84     ScreenObserver* observer,
  85     LocallyManagedUserCreationScreenHandler* actor)
  86     : WizardScreen(observer),
  87       weak_factory_(this),
  88       actor_(actor),
  89       on_error_screen_(false),
  90       last_page_(kNameOfIntroScreen),
  91       image_decoder_(NULL),
  92       apply_photo_after_decoding_(false),
  93       selected_image_(0) {
  94   DCHECK(actor_);
  95   if (actor_)
  96     actor_->SetDelegate(this);
  97 }
  98
  99 LocallyManagedUserCreationScreen::~LocallyManagedUserCreationScreen() {
 100   if (actor_)
 101     actor_->SetDelegate(NULL);
 102   if (image_decoder_.get())
 103     image_decoder_->set_delegate(NULL);
 104   NetworkPortalDetector::Get()->RemoveObserver(this);
 105 }
 106
 107 void LocallyManagedUserCreationScreen::PrepareToShow() {
 108   if (actor_)
 109     actor_->PrepareToShow();
 110 }
 111
 112 void LocallyManagedUserCreationScreen::Show() {
 113   if (actor_) {
 114     actor_->Show();
 115     // TODO(antrim) : temorary hack (until upcoming hackaton). Should be
 116     // removed once we have screens reworked.
 117     if (on_error_screen_)
 118       actor_->ShowPage(last_page_);
 119     else
 120       actor_->ShowIntroPage();
 121   }
 122
 123   if (!on_error_screen_)
 124     NetworkPortalDetector::Get()->AddAndFireObserver(this);
 125   on_error_screen_ = false;
 126 }
 127
 128 void LocallyManagedUserCreationScreen::OnPageSelected(const std::string& page) {
 129   last_page_ = page;
 130 }
 131
 132 void LocallyManagedUserCreationScreen::OnPortalDetectionCompleted(
 133     const NetworkState* network,
 134     const NetworkPortalDetector::CaptivePortalState& state)  {
 135   if (state.status == NetworkPortalDetector::CAPTIVE_PORTAL_STATUS_ONLINE) {
 136     get_screen_observer()->HideErrorScreen(this);
 137   } else {
 138     on_error_screen_ = true;
 139     ErrorScreen* screen = get_screen_observer()->GetErrorScreen();
 140     ConfigureErrorScreen(screen, network, state.status);
 141     screen->SetUIState(ErrorScreen::UI_STATE_LOCALLY_MANAGED);
 142     get_screen_observer()->ShowErrorScreen();
 143   }
 144 }
 145
 146 void LocallyManagedUserCreationScreen::
 147     ShowManagerInconsistentStateErrorScreen() {
 148   if (!actor_)
 149     return;
 150   actor_->ShowErrorPage(
 151       l10n_util::GetStringUTF16(
 152           IDS_CREATE_LOCALLY_MANAGED_USER_MANAGER_INCONSISTENT_STATE_TITLE),
 153       l10n_util::GetStringUTF16(
 154           IDS_CREATE_LOCALLY_MANAGED_USER_MANAGER_INCONSISTENT_STATE),
 155       l10n_util::GetStringUTF16(
 156           IDS_CREATE_LOCALLY_MANAGED_USER_MANAGER_INCONSISTENT_STATE_BUTTON));
 157 }
 158
 159 void LocallyManagedUserCreationScreen::ShowInitialScreen() {
 160   if (actor_)
 161     actor_->ShowIntroPage();
 162 }
 163
 164 void LocallyManagedUserCreationScreen::Hide() {
 165   if (actor_)
 166     actor_->Hide();
 167   if (!on_error_screen_)
 168     NetworkPortalDetector::Get()->RemoveObserver(this);
 169 }
 170
 171 std::string LocallyManagedUserCreationScreen::GetName() const {
 172   return WizardController::kLocallyManagedUserCreationScreenName;
 173 }
 174
 175 void LocallyManagedUserCreationScreen::AbortFlow() {
 176   controller_->CancelCreation();
 177 }
 178
 179 void LocallyManagedUserCreationScreen::FinishFlow() {
 180   controller_->FinishCreation();
 181 }
 182
 183 void LocallyManagedUserCreationScreen::AuthenticateManager(
 184     const std::string& manager_id,
 185     const std::string& manager_password) {
 186   // Make sure no two controllers exist at the same time.
 187   controller_.reset();
 188   SupervisedUserAuthentication* authentication =
 189       UserManager::Get()->GetSupervisedUserManager()->GetAuthentication();
 190
 191   if (authentication->GetStableSchema() ==
 192       SupervisedUserAuthentication::SCHEMA_PLAIN) {
 193     controller_.reset(new ManagedUserCreationControllerOld(this, manager_id));
 194   } else {
 195     controller_.reset(new ManagedUserCreationControllerNew(this, manager_id));
 196   }
 197
 198   ExistingUserController::current_controller()->
 199       Login(UserContext(manager_id,
 200                         manager_password,
 201                         std::string()  /* auth_code */));
 202 }
 203
 204 void LocallyManagedUserCreationScreen::CreateManagedUser(
 205     const base::string16& display_name,
 206     const std::string& managed_user_password) {
 207   DCHECK(controller_.get());
 208   int image;
 209   if (selected_image_ == User::kExternalImageIndex)
 210     // TODO(dzhioev): crbug/249660
 211     image = ManagedUserCreationController::kDummyAvatarIndex;
 212   else
 213     image = selected_image_;
 214   controller_->StartCreation(display_name, managed_user_password, image);
 215 }
 216
 217 void LocallyManagedUserCreationScreen::ImportManagedUser(
 218     const std::string& user_id) {
 219   DCHECK(controller_.get());
 220   DCHECK(existing_users_.get());
 221   VLOG(1) << "Importing user " << user_id;
 222   base::DictionaryValue* user_info;
 223   if (!existing_users_->GetDictionary(user_id, &user_info)) {
 224     LOG(ERROR) << "Can not import non-existing user " << user_id;
 225     return;
 226   }
 227   base::string16 display_name;
 228   std::string master_key;
 229   std::string avatar;
 230   bool exists;
 231   int avatar_index = ManagedUserCreationController::kDummyAvatarIndex;
 232   user_info->GetString(ManagedUserSyncService::kName, &display_name);
 233   user_info->GetString(ManagedUserSyncService::kMasterKey, &master_key);
 234   user_info->GetString(ManagedUserSyncService::kChromeOsAvatar, &avatar);
 235   user_info->GetBoolean(kUserExists, &exists);
 236
 237   // We should not get here with existing user selected, so just display error.
 238   if (exists) {
 239     actor_->ShowErrorPage(
 240         l10n_util::GetStringUTF16(
 241             IDS_CREATE_LOCALLY_MANAGED_USER_GENERIC_ERROR_TITLE),
 242         l10n_util::GetStringUTF16(
 243             IDS_CREATE_LOCALLY_MANAGED_USER_GENERIC_ERROR),
 244         l10n_util::GetStringUTF16(
 245             IDS_CREATE_LOCALLY_MANAGED_USER_GENERIC_ERROR_BUTTON));
 246     return;
 247   }
 248
 249   ManagedUserSyncService::GetAvatarIndex(avatar, &avatar_index);
 250
 251   controller_->StartImport(display_name,
 252                            std::string(),
 253                            avatar_index,
 254                            user_id,
 255                            master_key);
 256 }
 257
 258 // TODO(antrim): Code duplication with previous method will be removed once
 259 // password sync is implemented.
 260 void LocallyManagedUserCreationScreen::ImportManagedUserWithPassword(
 261     const std::string& user_id,
 262     const std::string& password) {
 263   DCHECK(controller_.get());
 264   DCHECK(existing_users_.get());
 265   VLOG(1) << "Importing user " << user_id;
 266   base::DictionaryValue* user_info;
 267   if (!existing_users_->GetDictionary(user_id, &user_info)) {
 268     LOG(ERROR) << "Can not import non-existing user " << user_id;
 269     return;
 270   }
 271   base::string16 display_name;
 272   std::string master_key;
 273   std::string avatar;
 274   bool exists;
 275   int avatar_index = ManagedUserCreationController::kDummyAvatarIndex;
 276   user_info->GetString(ManagedUserSyncService::kName, &display_name);
 277   user_info->GetString(ManagedUserSyncService::kMasterKey, &master_key);
 278   user_info->GetString(ManagedUserSyncService::kChromeOsAvatar, &avatar);
 279   user_info->GetBoolean(kUserExists, &exists);
 280
 281   // We should not get here with existing user selected, so just display error.
 282   if (exists) {
 283     actor_->ShowErrorPage(
 284         l10n_util::GetStringUTF16(
 285             IDS_CREATE_LOCALLY_MANAGED_USER_GENERIC_ERROR_TITLE),
 286         l10n_util::GetStringUTF16(
 287             IDS_CREATE_LOCALLY_MANAGED_USER_GENERIC_ERROR),
 288         l10n_util::GetStringUTF16(
 289             IDS_CREATE_LOCALLY_MANAGED_USER_GENERIC_ERROR_BUTTON));
 290     return;
 291   }
 292
 293   ManagedUserSyncService::GetAvatarIndex(avatar, &avatar_index);
 294
 295   controller_->StartImport(display_name,
 296                            password,
 297                            avatar_index,
 298                            user_id,
 299                            master_key);
 300 }
 301
 302 void LocallyManagedUserCreationScreen::OnManagerLoginFailure() {
 303   if (actor_)
 304     actor_->ShowManagerPasswordError();
 305 }
 306
 307 void LocallyManagedUserCreationScreen::OnManagerFullyAuthenticated(
 308     Profile* manager_profile) {
 309   DCHECK(controller_.get());
 310   // For manager user, move desktop to locked container so that windows created
 311   // during the user image picker step are below it.
 312   ash::Shell::GetInstance()->
 313       desktop_background_controller()->MoveDesktopToLockedContainer();
 314
 315   controller_->SetManagerProfile(manager_profile);
 316   if (actor_)
 317     actor_->ShowUsernamePage();
 318
 319   last_page_ = kNameOfNewUserParametersScreen;
 320
 321   CommandLine* command_line = CommandLine::ForCurrentProcess();
 322   if (!command_line->HasSwitch(::switches::kAllowCreateExistingManagedUsers))
 323     return;
 324
 325   ManagedUserSyncServiceFactory::GetForProfile(manager_profile)->
 326       GetManagedUsersAsync(base::Bind(
 327           &LocallyManagedUserCreationScreen::OnGetManagedUsers,
 328           weak_factory_.GetWeakPtr()));
 329 }
 330
 331 void LocallyManagedUserCreationScreen::OnManagerCryptohomeAuthenticated() {
 332   if (actor_) {
 333     actor_->ShowStatusMessage(true /* progress */, l10n_util::GetStringUTF16(
 334             IDS_CREATE_LOCALLY_MANAGED_USER_CREATION_AUTH_PROGRESS_MESSAGE));
 335   }
 336 }
 337
 338 void LocallyManagedUserCreationScreen::OnActorDestroyed(
 339     LocallyManagedUserCreationScreenHandler* actor) {
 340   if (actor_ == actor)
 341     actor_ = NULL;
 342 }
 343
 344 void LocallyManagedUserCreationScreen::OnCreationError(
 345     ManagedUserCreationController::ErrorCode code) {
 346   base::string16 title;
 347   base::string16 message;
 348   base::string16 button;
 349   // TODO(antrim) : find out which errors do we really have.
 350   // We might reuse some error messages from ordinary user flow.
 351   switch (code) {
 352     case ManagedUserCreationController::CRYPTOHOME_NO_MOUNT:
 353     case ManagedUserCreationController::CRYPTOHOME_FAILED_MOUNT:
 354     case ManagedUserCreationController::CRYPTOHOME_FAILED_TPM:
 355       title = l10n_util::GetStringUTF16(
 356           IDS_CREATE_LOCALLY_MANAGED_USER_TPM_ERROR_TITLE);
 357       message = l10n_util::GetStringUTF16(
 358           IDS_CREATE_LOCALLY_MANAGED_USER_TPM_ERROR);
 359       button = l10n_util::GetStringUTF16(
 360           IDS_CREATE_LOCALLY_MANAGED_USER_TPM_ERROR_BUTTON);
 361       break;
 362     case ManagedUserCreationController::CLOUD_SERVER_ERROR:
 363     case ManagedUserCreationController::TOKEN_WRITE_FAILED:
 364       title = l10n_util::GetStringUTF16(
 365           IDS_CREATE_LOCALLY_MANAGED_USER_GENERIC_ERROR_TITLE);
 366       message = l10n_util::GetStringUTF16(
 367           IDS_CREATE_LOCALLY_MANAGED_USER_GENERIC_ERROR);
 368       button = l10n_util::GetStringUTF16(
 369           IDS_CREATE_LOCALLY_MANAGED_USER_GENERIC_ERROR_BUTTON);
 370       break;
 371     case ManagedUserCreationController::NO_ERROR:
 372       NOTREACHED();
 373   }
 374   if (actor_)
 375     actor_->ShowErrorPage(title, message, button);
 376 }
 377
 378 void LocallyManagedUserCreationScreen::OnCreationTimeout() {
 379   if (actor_) {
 380     actor_->ShowStatusMessage(false /* error */, l10n_util::GetStringUTF16(
 381         IDS_CREATE_LOCALLY_MANAGED_USER_CREATION_CREATION_TIMEOUT_MESSAGE));
 382   }
 383 }
 384
 385 void LocallyManagedUserCreationScreen::OnLongCreationWarning() {
 386   if (actor_) {
 387     actor_->ShowStatusMessage(true /* progress */, l10n_util::GetStringUTF16(
 388         IDS_PROFILES_CREATE_MANAGED_JUST_SIGNED_IN));
 389   }
 390 }
 391
 392 bool LocallyManagedUserCreationScreen::FindUserByDisplayName(
 393     const base::string16& display_name,
 394     std::string *out_id) const {
 395   if (!existing_users_.get())
 396     return false;
 397   for (base::DictionaryValue::Iterator it(*existing_users_.get());
 398        !it.IsAtEnd(); it.Advance()) {
 399     const base::DictionaryValue* user_info =
 400         static_cast<const base::DictionaryValue*>(&it.value());
 401     base::string16 user_display_name;
 402     if (user_info->GetString(ManagedUserSyncService::kName,
 403                              &user_display_name)) {
 404       if (display_name == user_display_name) {
 405         if (out_id)
 406           *out_id = it.key();
 407         return true;
 408       }
 409     }
 410   }
 411   return false;
 412 }
 413
 414 // TODO(antrim) : this is an explicit code duplications with UserImageScreen.
 415 // It should be removed by issue 251179.
 416
 417 void LocallyManagedUserCreationScreen::ApplyPicture() {
 418   std::string user_id = controller_->GetManagedUserId();
 419   UserManager* user_manager = UserManager::Get();
 420   UserImageManager* image_manager = user_manager->GetUserImageManager(user_id);
 421   switch (selected_image_) {
 422     case User::kExternalImageIndex:
 423       // Photo decoding may not have been finished yet.
 424       if (user_photo_.isNull()) {
 425         apply_photo_after_decoding_ = true;
 426         return;
 427       }
 428       image_manager->SaveUserImage(UserImage::CreateAndEncode(user_photo_));
 429       break;
 430     case User::kProfileImageIndex:
 431       NOTREACHED() << "Supervised users have no profile pictures";
 432       break;
 433     default:
 434       DCHECK(selected_image_ >= 0 && selected_image_ < kDefaultImagesCount);
 435       image_manager->SaveUserDefaultImageIndex(selected_image_);
 436       break;
 437   }
 438   // Proceed to tutorial.
 439   actor_->ShowTutorialPage();
 440 }
 441
 442 void LocallyManagedUserCreationScreen::OnCreationSuccess() {
 443   ApplyPicture();
 444 }
 445
 446 void LocallyManagedUserCreationScreen::OnCameraPresenceCheckDone(
 447     bool is_camera_present) {
 448   if (actor_)
 449     actor_->SetCameraPresent(is_camera_present);
 450 }
 451
 452 void LocallyManagedUserCreationScreen::OnGetManagedUsers(
 453     const base::DictionaryValue* users) {
 454   // Copy for passing to WebUI, contains only id, name and avatar URL.
 455   scoped_ptr<base::ListValue> ui_users(new base::ListValue());
 456   SupervisedUserManager* supervised_user_manager =
 457       UserManager::Get()->GetSupervisedUserManager();
 458
 459   // Stored copy, contains all necessary information.
 460   existing_users_.reset(new base::DictionaryValue());
 461   for (base::DictionaryValue::Iterator it(*users); !it.IsAtEnd();
 462        it.Advance()) {
 463     // Copy that would be stored in this class.
 464     base::DictionaryValue* local_copy =
 465         static_cast<base::DictionaryValue*>(it.value().DeepCopy());
 466     // Copy that would be passed to WebUI. It has some extra values for
 467     // displaying, but does not contain sensitive data, such as master password.
 468     base::DictionaryValue* ui_copy =
 469         static_cast<base::DictionaryValue*>(new base::DictionaryValue());
 470
 471     int avatar_index = ManagedUserCreationController::kDummyAvatarIndex;
 472     std::string chromeos_avatar;
 473     if (local_copy->GetString(ManagedUserSyncService::kChromeOsAvatar,
 474                               &chromeos_avatar) &&
 475         !chromeos_avatar.empty() &&
 476         ManagedUserSyncService::GetAvatarIndex(
 477             chromeos_avatar, &avatar_index)) {
 478       ui_copy->SetString(kAvatarURLKey, GetDefaultImageUrl(avatar_index));
 479     } else {
 480       int i = base::RandInt(kFirstDefaultImageIndex, kDefaultImagesCount - 1);
 481       local_copy->SetString(
 482           ManagedUserSyncService::kChromeOsAvatar,
 483           ManagedUserSyncService::BuildAvatarString(i));
 484       local_copy->SetBoolean(kRandomAvatarKey, true);
 485       ui_copy->SetString(kAvatarURLKey, GetDefaultImageUrl(i));
 486     }
 487
 488     local_copy->SetBoolean(kUserExists, false);
 489     ui_copy->SetBoolean(kUserExists, false);
 490
 491     base::string16 display_name;
 492     local_copy->GetString(ManagedUserSyncService::kName, &display_name);
 493
 494     if (supervised_user_manager->FindBySyncId(it.key())) {
 495       local_copy->SetBoolean(kUserExists, true);
 496       ui_copy->SetBoolean(kUserExists, true);
 497       local_copy->SetString(kUserConflict, kUserConflictImported);
 498       ui_copy->SetString(kUserConflict, kUserConflictImported);
 499     } else if (supervised_user_manager->FindByDisplayName(display_name)) {
 500       local_copy->SetBoolean(kUserExists, true);
 501       ui_copy->SetBoolean(kUserExists, true);
 502       local_copy->SetString(kUserConflict, kUserConflictName);
 503       ui_copy->SetString(kUserConflict, kUserConflictName);
 504     }
 505     ui_copy->SetString(ManagedUserSyncService::kName, display_name);
 506     // TODO(antrim): For now mark all users as having no password.
 507     ui_copy->SetBoolean(kUserNeedPassword, true);
 508     ui_copy->SetString("id", it.key());
 509
 510     existing_users_->Set(it.key(), local_copy);
 511     ui_users->Append(ui_copy);
 512   }
 513   actor_->ShowExistingManagedUsers(ui_users.get());
 514 }
 515
 516 void LocallyManagedUserCreationScreen::OnPhotoTaken(
 517     const std::string& raw_data) {
 518   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 519   user_photo_ = gfx::ImageSkia();
 520   if (image_decoder_.get())
 521     image_decoder_->set_delegate(NULL);
 522   image_decoder_ = new ImageDecoder(this, raw_data,
 523                                     ImageDecoder::DEFAULT_CODEC);
 524   scoped_refptr<base::MessageLoopProxy> task_runner =
 525       content::BrowserThread::GetMessageLoopProxyForThread(
 526           content::BrowserThread::UI);
 527   image_decoder_->Start(task_runner);
 528 }
 529
 530 void LocallyManagedUserCreationScreen::OnImageDecoded(
 531     const ImageDecoder* decoder,
 532     const SkBitmap& decoded_image) {
 533   DCHECK_EQ(image_decoder_.get(), decoder);
 534   user_photo_ = gfx::ImageSkia::CreateFrom1xBitmap(decoded_image);
 535   if (apply_photo_after_decoding_)
 536     ApplyPicture();
 537 }
 538
 539 void LocallyManagedUserCreationScreen::OnDecodeImageFailed(
 540     const ImageDecoder* decoder) {
 541   NOTREACHED() << "Failed to decode PNG image from WebUI";
 542 }
 543
 544 void LocallyManagedUserCreationScreen::OnImageSelected(
 545     const std::string& image_type,
 546     const std::string& image_url) {
 547   if (image_url.empty())
 548     return;
 549   int user_image_index = User::kInvalidImageIndex;
 550   if (image_type == "default" &&
 551       IsDefaultImageUrl(image_url, &user_image_index)) {
 552     selected_image_ = user_image_index;
 553   } else if (image_type == "camera") {
 554     selected_image_ = User::kExternalImageIndex;
 555   } else {
 556     NOTREACHED() << "Unexpected image type: " << image_type;
 557   }
 558 }
 559
 560 void LocallyManagedUserCreationScreen::OnImageAccepted() {
 561 }
 562
 563 }  // namespace chromeos