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/locally_managed_user_creation_controller.h"
  15 #include "chrome/browser/chromeos/login/screens/error_screen.h"
  16 #include "chrome/browser/chromeos/login/screens/screen_observer.h"
  17 #include "chrome/browser/chromeos/login/supervised_user_manager.h"
  18 #include "chrome/browser/chromeos/login/user_image.h"
  19 #include "chrome/browser/chromeos/login/user_image_manager.h"
  20 #include "chrome/browser/chromeos/login/wizard_controller.h"
  21 #include "chrome/browser/managed_mode/managed_user_sync_service.h"
  22 #include "chrome/browser/managed_mode/managed_user_sync_service_factory.h"
  23 #include "chrome/common/chrome_switches.h"
  24 #include "chromeos/network/network_state.h"
  25 #include "content/public/browser/browser_thread.h"
  26 #include "grit/generated_resources.h"
  27 #include "third_party/skia/include/core/SkBitmap.h"
  28 #include "ui/base/l10n/l10n_util.h"
  29 #include "ui/gfx/image/image_skia.h"
  30
  31 namespace chromeos {
  32
  33 namespace {
  34
  35 // Key for (boolean) value that indicates that user already exists on device.
  36 const char kUserExists[] = "exists";
  37 // Key for  value that indicates why user can not be imported.
  38 const char kUserConflict[] = "conflict";
  39 // User is already imported.
  40 const char kUserConflictImported[] = "imported";
  41 // There is another supervised user with same name.
  42 const char kUserConflictName[] = "name";
  43
  44 const char kUserNeedPassword[] = "needPassword";
  45
  46 const char kAvatarURLKey[] = "avatarurl";
  47 const char kRandomAvatarKey[] = "randomAvatar";
  48 const char kNameOfIntroScreen[] = "intro";
  49 const char kNameOfNewUserParametersScreen[] = "username";
  50
  51 void ConfigureErrorScreen(ErrorScreen* screen,
  52     const NetworkState* network,
  53     const NetworkPortalDetector::CaptivePortalStatus status) {
  54   switch (status) {
  55     case NetworkPortalDetector::CAPTIVE_PORTAL_STATUS_UNKNOWN:
  56     case NetworkPortalDetector::CAPTIVE_PORTAL_STATUS_ONLINE:
  57       NOTREACHED();
  58       break;
  59     case NetworkPortalDetector::CAPTIVE_PORTAL_STATUS_OFFLINE:
  60       screen->SetErrorState(ErrorScreen::ERROR_STATE_OFFLINE,
  61                             std::string());
  62       break;
  63     case NetworkPortalDetector::CAPTIVE_PORTAL_STATUS_PORTAL:
  64       screen->SetErrorState(ErrorScreen::ERROR_STATE_PORTAL,
  65                             network->name());
  66       screen->FixCaptivePortal();
  67       break;
  68     case NetworkPortalDetector::CAPTIVE_PORTAL_STATUS_PROXY_AUTH_REQUIRED:
  69       screen->SetErrorState(ErrorScreen::ERROR_STATE_PROXY,
  70                             std::string());
  71       break;
  72     default:
  73       NOTREACHED();
  74       break;
  75   }
  76 }
  77
  78 } // namespace
  79
  80 LocallyManagedUserCreationScreen::LocallyManagedUserCreationScreen(
  81     ScreenObserver* observer,
  82     LocallyManagedUserCreationScreenHandler* actor)
  83     : WizardScreen(observer),
  84       weak_factory_(this),
  85       actor_(actor),
  86       on_error_screen_(false),
  87       last_page_(kNameOfIntroScreen),
  88       image_decoder_(NULL),
  89       apply_photo_after_decoding_(false),
  90       selected_image_(0),
  91       was_camera_present_(false) {
  92   DCHECK(actor_);
  93   if (actor_)
  94     actor_->SetDelegate(this);
  95 }
  96
  97 LocallyManagedUserCreationScreen::~LocallyManagedUserCreationScreen() {
  98   if (actor_)
  99     actor_->SetDelegate(NULL);
 100   if (image_decoder_.get())
 101     image_decoder_->set_delegate(NULL);
 102   NetworkPortalDetector::Get()->RemoveObserver(this);
 103 }
 104
 105 void LocallyManagedUserCreationScreen::PrepareToShow() {
 106   if (actor_)
 107     actor_->PrepareToShow();
 108 }
 109
 110 void LocallyManagedUserCreationScreen::Show() {
 111   if (actor_) {
 112     actor_->Show();
 113     // TODO(antrim) : temorary hack (until upcoming hackaton). Should be
 114     // removed once we have screens reworked.
 115     if (on_error_screen_)
 116       actor_->ShowPage(last_page_);
 117     else
 118       actor_->ShowIntroPage();
 119   }
 120
 121   if (!on_error_screen_)
 122     NetworkPortalDetector::Get()->AddAndFireObserver(this);
 123   on_error_screen_ = false;
 124 }
 125
 126 void LocallyManagedUserCreationScreen::OnPageSelected(const std::string& page) {
 127   last_page_ = page;
 128 }
 129
 130 void LocallyManagedUserCreationScreen::OnPortalDetectionCompleted(
 131     const NetworkState* network,
 132     const NetworkPortalDetector::CaptivePortalState& state)  {
 133   if (state.status == NetworkPortalDetector::CAPTIVE_PORTAL_STATUS_ONLINE) {
 134     get_screen_observer()->HideErrorScreen(this);
 135   } else {
 136     on_error_screen_ = true;
 137     ErrorScreen* screen = get_screen_observer()->GetErrorScreen();
 138     ConfigureErrorScreen(screen, network, state.status);
 139     screen->SetUIState(ErrorScreen::UI_STATE_LOCALLY_MANAGED);
 140     get_screen_observer()->ShowErrorScreen();
 141   }
 142 }
 143
 144 void LocallyManagedUserCreationScreen::
 145     ShowManagerInconsistentStateErrorScreen() {
 146   if (!actor_)
 147     return;
 148   actor_->ShowErrorPage(
 149       l10n_util::GetStringUTF16(
 150           IDS_CREATE_LOCALLY_MANAGED_USER_MANAGER_INCONSISTENT_STATE_TITLE),
 151       l10n_util::GetStringUTF16(
 152           IDS_CREATE_LOCALLY_MANAGED_USER_MANAGER_INCONSISTENT_STATE),
 153       l10n_util::GetStringUTF16(
 154           IDS_CREATE_LOCALLY_MANAGED_USER_MANAGER_INCONSISTENT_STATE_BUTTON));
 155 }
 156
 157 void LocallyManagedUserCreationScreen::ShowInitialScreen() {
 158   if (actor_)
 159     actor_->ShowIntroPage();
 160 }
 161
 162 void LocallyManagedUserCreationScreen::Hide() {
 163   if (actor_)
 164     actor_->Hide();
 165   if (!on_error_screen_)
 166     NetworkPortalDetector::Get()->RemoveObserver(this);
 167 }
 168
 169 std::string LocallyManagedUserCreationScreen::GetName() const {
 170   return WizardController::kLocallyManagedUserCreationScreenName;
 171 }
 172
 173 void LocallyManagedUserCreationScreen::AbortFlow() {
 174   controller_->CancelCreation();
 175 }
 176
 177 void LocallyManagedUserCreationScreen::FinishFlow() {
 178   controller_->FinishCreation();
 179 }
 180
 181 void LocallyManagedUserCreationScreen::AuthenticateManager(
 182     const std::string& manager_id,
 183     const std::string& manager_password) {
 184   // Make sure no two controllers exist at the same time.
 185   controller_.reset();
 186   controller_.reset(new LocallyManagedUserCreationController(this, manager_id));
 187
 188   ExistingUserController::current_controller()->
 189       Login(UserContext(manager_id,
 190                         manager_password,
 191                         std::string()  /* auth_code */));
 192 }
 193
 194 void LocallyManagedUserCreationScreen::CreateManagedUser(
 195     const base::string16& display_name,
 196     const std::string& managed_user_password) {
 197   DCHECK(controller_.get());
 198   int image;
 199   if (selected_image_ == User::kExternalImageIndex)
 200     // TODO(dzhioev): crbug/249660
 201     image = LocallyManagedUserCreationController::kDummyAvatarIndex;
 202   else
 203     image = selected_image_;
 204   controller_->SetUpCreation(display_name, managed_user_password, image);
 205   controller_->StartCreation();
 206 }
 207
 208 void LocallyManagedUserCreationScreen::ImportManagedUser(
 209     const std::string& user_id) {
 210   DCHECK(controller_.get());
 211   DCHECK(existing_users_.get());
 212   VLOG(1) << "Importing user " << user_id;
 213   base::DictionaryValue* user_info;
 214   if (!existing_users_->GetDictionary(user_id, &user_info)) {
 215     LOG(ERROR) << "Can not import non-existing user " << user_id;
 216     return;
 217   }
 218   base::string16 display_name;
 219   std::string master_key;
 220   std::string avatar;
 221   bool exists;
 222   int avatar_index = LocallyManagedUserCreationController::kDummyAvatarIndex;
 223   user_info->GetString(ManagedUserSyncService::kName, &display_name);
 224   user_info->GetString(ManagedUserSyncService::kMasterKey, &master_key);
 225   user_info->GetString(ManagedUserSyncService::kChromeOsAvatar, &avatar);
 226   user_info->GetBoolean(kUserExists, &exists);
 227
 228   // We should not get here with existing user selected, so just display error.
 229   if (exists) {
 230     actor_->ShowErrorPage(
 231         l10n_util::GetStringUTF16(
 232             IDS_CREATE_LOCALLY_MANAGED_USER_GENERIC_ERROR_TITLE),
 233         l10n_util::GetStringUTF16(
 234             IDS_CREATE_LOCALLY_MANAGED_USER_GENERIC_ERROR),
 235         l10n_util::GetStringUTF16(
 236             IDS_CREATE_LOCALLY_MANAGED_USER_GENERIC_ERROR_BUTTON));
 237     return;
 238   }
 239
 240   ManagedUserSyncService::GetAvatarIndex(avatar, &avatar_index);
 241
 242   controller_->StartImport(display_name,
 243                            std::string(),
 244                            avatar_index,
 245                            user_id,
 246                            master_key);
 247 }
 248
 249 // TODO(antrim): Code duplication with previous method will be removed once
 250 // password sync is implemented.
 251 void LocallyManagedUserCreationScreen::ImportManagedUserWithPassword(
 252     const std::string& user_id,
 253     const std::string& password) {
 254   DCHECK(controller_.get());
 255   DCHECK(existing_users_.get());
 256   VLOG(1) << "Importing user " << user_id;
 257   base::DictionaryValue* user_info;
 258   if (!existing_users_->GetDictionary(user_id, &user_info)) {
 259     LOG(ERROR) << "Can not import non-existing user " << user_id;
 260     return;
 261   }
 262   base::string16 display_name;
 263   std::string master_key;
 264   std::string avatar;
 265   bool exists;
 266   int avatar_index = LocallyManagedUserCreationController::kDummyAvatarIndex;
 267   user_info->GetString(ManagedUserSyncService::kName, &display_name);
 268   user_info->GetString(ManagedUserSyncService::kMasterKey, &master_key);
 269   user_info->GetString(ManagedUserSyncService::kChromeOsAvatar, &avatar);
 270   user_info->GetBoolean(kUserExists, &exists);
 271
 272   // We should not get here with existing user selected, so just display error.
 273   if (exists) {
 274     actor_->ShowErrorPage(
 275         l10n_util::GetStringUTF16(
 276             IDS_CREATE_LOCALLY_MANAGED_USER_GENERIC_ERROR_TITLE),
 277         l10n_util::GetStringUTF16(
 278             IDS_CREATE_LOCALLY_MANAGED_USER_GENERIC_ERROR),
 279         l10n_util::GetStringUTF16(
 280             IDS_CREATE_LOCALLY_MANAGED_USER_GENERIC_ERROR_BUTTON));
 281     return;
 282   }
 283
 284   ManagedUserSyncService::GetAvatarIndex(avatar, &avatar_index);
 285
 286   controller_->StartImport(display_name,
 287                            password,
 288                            avatar_index,
 289                            user_id,
 290                            master_key);
 291 }
 292
 293 void LocallyManagedUserCreationScreen::OnManagerLoginFailure() {
 294   if (actor_)
 295     actor_->ShowManagerPasswordError();
 296 }
 297
 298 void LocallyManagedUserCreationScreen::OnManagerFullyAuthenticated(
 299     Profile* manager_profile) {
 300   DCHECK(controller_.get());
 301   // For manager user, move desktop to locked container so that windows created
 302   // during the user image picker step are below it.
 303   ash::Shell::GetInstance()->
 304       desktop_background_controller()->MoveDesktopToLockedContainer();
 305
 306   controller_->SetManagerProfile(manager_profile);
 307   if (actor_)
 308     actor_->ShowUsernamePage();
 309
 310   last_page_ = kNameOfNewUserParametersScreen;
 311
 312   CommandLine* command_line = CommandLine::ForCurrentProcess();
 313   if (!command_line->HasSwitch(::switches::kAllowCreateExistingManagedUsers))
 314     return;
 315
 316   ManagedUserSyncServiceFactory::GetForProfile(manager_profile)->
 317       GetManagedUsersAsync(base::Bind(
 318           &LocallyManagedUserCreationScreen::OnGetManagedUsers,
 319           weak_factory_.GetWeakPtr()));
 320 }
 321
 322 void LocallyManagedUserCreationScreen::OnManagerCryptohomeAuthenticated() {
 323   if (actor_) {
 324     actor_->ShowStatusMessage(true /* progress */, l10n_util::GetStringUTF16(
 325             IDS_CREATE_LOCALLY_MANAGED_USER_CREATION_AUTH_PROGRESS_MESSAGE));
 326   }
 327 }
 328
 329 void LocallyManagedUserCreationScreen::OnActorDestroyed(
 330     LocallyManagedUserCreationScreenHandler* actor) {
 331   if (actor_ == actor)
 332     actor_ = NULL;
 333 }
 334
 335 void LocallyManagedUserCreationScreen::OnCreationError(
 336     LocallyManagedUserCreationController::ErrorCode code) {
 337   base::string16 title;
 338   base::string16 message;
 339   base::string16 button;
 340   // TODO(antrim) : find out which errors do we really have.
 341   // We might reuse some error messages from ordinary user flow.
 342   switch (code) {
 343     case LocallyManagedUserCreationController::CRYPTOHOME_NO_MOUNT:
 344     case LocallyManagedUserCreationController::CRYPTOHOME_FAILED_MOUNT:
 345     case LocallyManagedUserCreationController::CRYPTOHOME_FAILED_TPM:
 346       title = l10n_util::GetStringUTF16(
 347           IDS_CREATE_LOCALLY_MANAGED_USER_TPM_ERROR_TITLE);
 348       message = l10n_util::GetStringUTF16(
 349           IDS_CREATE_LOCALLY_MANAGED_USER_TPM_ERROR);
 350       button = l10n_util::GetStringUTF16(
 351           IDS_CREATE_LOCALLY_MANAGED_USER_TPM_ERROR_BUTTON);
 352       break;
 353     case LocallyManagedUserCreationController::CLOUD_SERVER_ERROR:
 354     case LocallyManagedUserCreationController::TOKEN_WRITE_FAILED:
 355       title = l10n_util::GetStringUTF16(
 356           IDS_CREATE_LOCALLY_MANAGED_USER_GENERIC_ERROR_TITLE);
 357       message = l10n_util::GetStringUTF16(
 358           IDS_CREATE_LOCALLY_MANAGED_USER_GENERIC_ERROR);
 359       button = l10n_util::GetStringUTF16(
 360           IDS_CREATE_LOCALLY_MANAGED_USER_GENERIC_ERROR_BUTTON);
 361       break;
 362     case LocallyManagedUserCreationController::NO_ERROR:
 363       NOTREACHED();
 364   }
 365   if (actor_)
 366     actor_->ShowErrorPage(title, message, button);
 367 }
 368
 369 void LocallyManagedUserCreationScreen::OnCreationTimeout() {
 370   if (actor_) {
 371     actor_->ShowStatusMessage(false /* error */, l10n_util::GetStringUTF16(
 372         IDS_CREATE_LOCALLY_MANAGED_USER_CREATION_CREATION_TIMEOUT_MESSAGE));
 373   }
 374 }
 375
 376 void LocallyManagedUserCreationScreen::OnLongCreationWarning() {
 377   if (actor_) {
 378     actor_->ShowStatusMessage(true /* progress */, l10n_util::GetStringUTF16(
 379         IDS_PROFILES_CREATE_MANAGED_JUST_SIGNED_IN));
 380   }
 381 }
 382
 383 bool LocallyManagedUserCreationScreen::FindUserByDisplayName(
 384     const base::string16& display_name,
 385     std::string *out_id) const {
 386   if (!existing_users_.get())
 387     return false;
 388   for (base::DictionaryValue::Iterator it(*existing_users_.get());
 389        !it.IsAtEnd(); it.Advance()) {
 390     const base::DictionaryValue* user_info =
 391         static_cast<const base::DictionaryValue*>(&it.value());
 392     base::string16 user_display_name;
 393     if (user_info->GetString(ManagedUserSyncService::kName,
 394                              &user_display_name)) {
 395       if (display_name == user_display_name) {
 396         if (out_id)
 397           *out_id = it.key();
 398         return true;
 399       }
 400     }
 401   }
 402   return false;
 403 }
 404
 405 // TODO(antrim) : this is an explicit code duplications with UserImageScreen.
 406 // It should be removed by issue 251179.
 407
 408 void LocallyManagedUserCreationScreen::ApplyPicture() {
 409   std::string user_id = controller_->GetManagedUserId();
 410   UserManager* user_manager = UserManager::Get();
 411   UserImageManager* image_manager = user_manager->GetUserImageManager(user_id);
 412   switch (selected_image_) {
 413     case User::kExternalImageIndex:
 414       // Photo decoding may not have been finished yet.
 415       if (user_photo_.isNull()) {
 416         apply_photo_after_decoding_ = true;
 417         return;
 418       }
 419       image_manager->SaveUserImage(UserImage::CreateAndEncode(user_photo_));
 420       break;
 421     case User::kProfileImageIndex:
 422       NOTREACHED() << "Supervised users have no profile pictures";
 423       break;
 424     default:
 425       DCHECK(selected_image_ >= 0 && selected_image_ < kDefaultImagesCount);
 426       image_manager->SaveUserDefaultImageIndex(selected_image_);
 427       break;
 428   }
 429   // Proceed to tutorial.
 430   actor_->ShowTutorialPage();
 431 }
 432
 433 void LocallyManagedUserCreationScreen::OnCreationSuccess() {
 434   ApplyPicture();
 435 }
 436
 437 void LocallyManagedUserCreationScreen::CheckCameraPresence() {
 438   CameraDetector::StartPresenceCheck(
 439       base::Bind(&LocallyManagedUserCreationScreen::OnCameraPresenceCheckDone,
 440                  weak_factory_.GetWeakPtr()));
 441 }
 442
 443 void LocallyManagedUserCreationScreen::OnCameraPresenceCheckDone() {
 444   bool is_camera_present = CameraDetector::camera_presence() ==
 445                            CameraDetector::kCameraPresent;
 446   if (actor_) {
 447     if (is_camera_present != was_camera_present_) {
 448       actor_->SetCameraPresent(is_camera_present);
 449       was_camera_present_ = is_camera_present;
 450     }
 451   }
 452 }
 453
 454 void LocallyManagedUserCreationScreen::OnGetManagedUsers(
 455     const base::DictionaryValue* users) {
 456   // Copy for passing to WebUI, contains only id, name and avatar URL.
 457   scoped_ptr<base::ListValue> ui_users(new base::ListValue());
 458   SupervisedUserManager* supervised_user_manager =
 459       UserManager::Get()->GetSupervisedUserManager();
 460
 461   // Stored copy, contains all necessary information.
 462   existing_users_.reset(new base::DictionaryValue());
 463   for (base::DictionaryValue::Iterator it(*users); !it.IsAtEnd();
 464        it.Advance()) {
 465     // Copy that would be stored in this class.
 466     base::DictionaryValue* local_copy =
 467         static_cast<base::DictionaryValue*>(it.value().DeepCopy());
 468     // Copy that would be passed to WebUI. It has some extra values for
 469     // displaying, but does not contain sensitive data, such as master password.
 470     base::DictionaryValue* ui_copy =
 471         static_cast<base::DictionaryValue*>(new base::DictionaryValue());
 472
 473     int avatar_index = LocallyManagedUserCreationController::kDummyAvatarIndex;
 474     std::string chromeos_avatar;
 475     if (local_copy->GetString(ManagedUserSyncService::kChromeOsAvatar,
 476                               &chromeos_avatar) &&
 477         !chromeos_avatar.empty() &&
 478         ManagedUserSyncService::GetAvatarIndex(
 479             chromeos_avatar, &avatar_index)) {
 480       ui_copy->SetString(kAvatarURLKey, GetDefaultImageUrl(avatar_index));
 481     } else {
 482       int i = base::RandInt(kFirstDefaultImageIndex, kDefaultImagesCount - 1);
 483       local_copy->SetString(
 484           ManagedUserSyncService::kChromeOsAvatar,
 485           ManagedUserSyncService::BuildAvatarString(i));
 486       local_copy->SetBoolean(kRandomAvatarKey, true);
 487       ui_copy->SetString(kAvatarURLKey, GetDefaultImageUrl(i));
 488     }
 489
 490     local_copy->SetBoolean(kUserExists, false);
 491     ui_copy->SetBoolean(kUserExists, false);
 492
 493     base::string16 display_name;
 494     local_copy->GetString(ManagedUserSyncService::kName, &display_name);
 495
 496     if (supervised_user_manager->FindBySyncId(it.key())) {
 497       local_copy->SetBoolean(kUserExists, true);
 498       ui_copy->SetBoolean(kUserExists, true);
 499       local_copy->SetString(kUserConflict, kUserConflictImported);
 500       ui_copy->SetString(kUserConflict, kUserConflictImported);
 501     } else if (supervised_user_manager->FindByDisplayName(display_name)) {
 502       local_copy->SetBoolean(kUserExists, true);
 503       ui_copy->SetBoolean(kUserExists, true);
 504       local_copy->SetString(kUserConflict, kUserConflictName);
 505       ui_copy->SetString(kUserConflict, kUserConflictName);
 506     }
 507     ui_copy->SetString(ManagedUserSyncService::kName, display_name);
 508     // TODO(antrim): For now mark all users as having no password.
 509     ui_copy->SetBoolean(kUserNeedPassword, true);
 510     ui_copy->SetString("id", it.key());
 511
 512     existing_users_->Set(it.key(), local_copy);
 513     ui_users->Append(ui_copy);
 514   }
 515   actor_->ShowExistingManagedUsers(ui_users.get());
 516 }
 517
 518 void LocallyManagedUserCreationScreen::OnPhotoTaken(
 519     const std::string& raw_data) {
 520   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 521   user_photo_ = gfx::ImageSkia();
 522   if (image_decoder_.get())
 523     image_decoder_->set_delegate(NULL);
 524   image_decoder_ = new ImageDecoder(this, raw_data,
 525                                     ImageDecoder::DEFAULT_CODEC);
 526   scoped_refptr<base::MessageLoopProxy> task_runner =
 527       content::BrowserThread::GetMessageLoopProxyForThread(
 528           content::BrowserThread::UI);
 529   image_decoder_->Start(task_runner);
 530 }
 531
 532 void LocallyManagedUserCreationScreen::OnImageDecoded(
 533     const ImageDecoder* decoder,
 534     const SkBitmap& decoded_image) {
 535   DCHECK_EQ(image_decoder_.get(), decoder);
 536   user_photo_ = gfx::ImageSkia::CreateFrom1xBitmap(decoded_image);
 537   if (apply_photo_after_decoding_)
 538     ApplyPicture();
 539 }
 540
 541 void LocallyManagedUserCreationScreen::OnDecodeImageFailed(
 542     const ImageDecoder* decoder) {
 543   NOTREACHED() << "Failed to decode PNG image from WebUI";
 544 }
 545
 546 void LocallyManagedUserCreationScreen::OnImageSelected(
 547     const std::string& image_type,
 548     const std::string& image_url) {
 549   if (image_url.empty())
 550     return;
 551   int user_image_index = User::kInvalidImageIndex;
 552   if (image_type == "default" &&
 553       IsDefaultImageUrl(image_url, &user_image_index)) {
 554     selected_image_ = user_image_index;
 555   } else if (image_type == "camera") {
 556     selected_image_ = User::kExternalImageIndex;
 557   } else {
 558     NOTREACHED() << "Unexpected image type: " << image_type;
 559   }
 560 }
 561
 562 void LocallyManagedUserCreationScreen::OnImageAccepted() {
 563 }
 564
 565 }  // namespace chromeos