src/chrome/browser/extensions/external_provider_impl.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/extensions/external_provider_impl.h"
   6
   7 #include <set>
   8 #include <vector>
   9
  10 #include "base/command_line.h"
  11 #include "base/files/file_path.h"
  12 #include "base/logging.h"
  13 #include "base/memory/linked_ptr.h"
  14 #include "base/metrics/field_trial.h"
  15 #include "base/strings/string_util.h"
  16 #include "base/values.h"
  17 #include "base/version.h"
  18 #include "chrome/browser/app_mode/app_mode_utils.h"
  19 #include "chrome/browser/browser_process.h"
  20 #include "chrome/browser/extensions/extension_management.h"
  21 #include "chrome/browser/extensions/extension_service.h"
  22 #include "chrome/browser/extensions/external_component_loader.h"
  23 #include "chrome/browser/extensions/external_policy_loader.h"
  24 #include "chrome/browser/extensions/external_pref_loader.h"
  25 #include "chrome/browser/profiles/profile.h"
  26 #include "chrome/common/chrome_paths.h"
  27 #include "chrome/common/chrome_switches.h"
  28 #include "components/crx_file/id_util.h"
  29 #include "content/public/browser/browser_thread.h"
  30 #include "extensions/browser/extension_system.h"
  31 #include "extensions/browser/external_provider_interface.h"
  32 #include "extensions/common/extension.h"
  33 #include "extensions/common/manifest.h"
  34 #include "ui/base/l10n/l10n_util.h"
  35
  36 #if defined(OS_CHROMEOS)
  37 #include "chrome/browser/chromeos/app_mode/kiosk_app_manager.h"
  38 #include "chrome/browser/chromeos/customization_document.h"
  39 #include "chrome/browser/chromeos/extensions/device_local_account_external_policy_loader.h"
  40 #include "chrome/browser/chromeos/policy/app_pack_updater.h"
  41 #include "chrome/browser/chromeos/policy/browser_policy_connector_chromeos.h"
  42 #include "chrome/browser/chromeos/policy/device_local_account.h"
  43 #include "chrome/browser/chromeos/policy/device_local_account_policy_service.h"
  44 #include "chrome/browser/chromeos/profiles/profile_helper.h"
  45 #include "components/user_manager/user.h"
  46 #include "components/user_manager/user_manager.h"
  47 #else
  48 #include "chrome/browser/extensions/default_apps.h"
  49 #endif
  50
  51 #if defined(OS_WIN)
  52 #include "chrome/browser/extensions/external_registry_loader_win.h"
  53 #endif
  54
  55 using content::BrowserThread;
  56
  57 namespace extensions {
  58
  59 // Constants for keeping track of extension preferences in a dictionary.
  60 const char ExternalProviderImpl::kInstallParam[] = "install_parameter";
  61 const char ExternalProviderImpl::kExternalCrx[] = "external_crx";
  62 const char ExternalProviderImpl::kExternalVersion[] = "external_version";
  63 const char ExternalProviderImpl::kExternalUpdateUrl[] = "external_update_url";
  64 const char ExternalProviderImpl::kIsBookmarkApp[] = "is_bookmark_app";
  65 const char ExternalProviderImpl::kIsFromWebstore[] = "is_from_webstore";
  66 const char ExternalProviderImpl::kKeepIfPresent[] = "keep_if_present";
  67 const char ExternalProviderImpl::kWasInstalledByOem[] = "was_installed_by_oem";
  68 const char ExternalProviderImpl::kSupportedLocales[] = "supported_locales";
  69 const char ExternalProviderImpl::kMayBeUntrusted[] = "may_be_untrusted";
  70
  71 ExternalProviderImpl::ExternalProviderImpl(
  72     VisitorInterface* service,
  73     const scoped_refptr<ExternalLoader>& loader,
  74     Profile* profile,
  75     Manifest::Location crx_location,
  76     Manifest::Location download_location,
  77     int creation_flags)
  78     : crx_location_(crx_location),
  79       download_location_(download_location),
  80       service_(service),
  81       ready_(false),
  82       loader_(loader),
  83       profile_(profile),
  84       creation_flags_(creation_flags),
  85       auto_acknowledge_(false) {
  86   loader_->Init(this);
  87 }
  88
  89 ExternalProviderImpl::~ExternalProviderImpl() {
  90   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  91   loader_->OwnerShutdown();
  92 }
  93
  94 void ExternalProviderImpl::VisitRegisteredExtension() {
  95   // The loader will call back to SetPrefs.
  96   loader_->StartLoading();
  97 }
  98
  99 void ExternalProviderImpl::SetPrefs(base::DictionaryValue* prefs) {
 100   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 101
 102   // Check if the service is still alive. It is possible that it went
 103   // away while |loader_| was working on the FILE thread.
 104   if (!service_) return;
 105
 106   prefs_.reset(prefs);
 107   ready_ = true;  // Queries for extensions are allowed from this point.
 108
 109   // Set of unsupported extensions that need to be deleted from prefs_.
 110   std::set<std::string> unsupported_extensions;
 111
 112   // Notify ExtensionService about all the extensions this provider has.
 113   for (base::DictionaryValue::Iterator i(*prefs_); !i.IsAtEnd(); i.Advance()) {
 114     const std::string& extension_id = i.key();
 115     const base::DictionaryValue* extension = NULL;
 116
 117     if (!crx_file::id_util::IdIsValid(extension_id)) {
 118       LOG(WARNING) << "Malformed extension dictionary: key "
 119                    << extension_id.c_str() << " is not a valid id.";
 120       continue;
 121     }
 122
 123     if (!i.value().GetAsDictionary(&extension)) {
 124       LOG(WARNING) << "Malformed extension dictionary: key "
 125                    << extension_id.c_str()
 126                    << " has a value that is not a dictionary.";
 127       continue;
 128     }
 129
 130     base::FilePath::StringType external_crx;
 131     const base::Value* external_version_value = NULL;
 132     std::string external_version;
 133     std::string external_update_url;
 134
 135     bool has_external_crx = extension->GetString(kExternalCrx, &external_crx);
 136
 137     bool has_external_version = false;
 138     if (extension->Get(kExternalVersion, &external_version_value)) {
 139       if (external_version_value->IsType(base::Value::TYPE_STRING)) {
 140         external_version_value->GetAsString(&external_version);
 141         has_external_version = true;
 142       } else {
 143         LOG(WARNING) << "Malformed extension dictionary for extension: "
 144                      << extension_id.c_str() << ". " << kExternalVersion
 145                      << " value must be a string.";
 146         continue;
 147       }
 148     }
 149
 150     bool has_external_update_url = extension->GetString(kExternalUpdateUrl,
 151                                                         &external_update_url);
 152     if (has_external_crx != has_external_version) {
 153       LOG(WARNING) << "Malformed extension dictionary for extension: "
 154                    << extension_id.c_str() << ".  " << kExternalCrx
 155                    << " and " << kExternalVersion << " must be used together.";
 156       continue;
 157     }
 158
 159     if (has_external_crx == has_external_update_url) {
 160       LOG(WARNING) << "Malformed extension dictionary for extension: "
 161                    << extension_id.c_str() << ".  Exactly one of the "
 162                    << "followng keys should be used: " << kExternalCrx
 163                    << ", " << kExternalUpdateUrl << ".";
 164       continue;
 165     }
 166
 167     // Check that extension supports current browser locale.
 168     const base::ListValue* supported_locales = NULL;
 169     if (extension->GetList(kSupportedLocales, &supported_locales)) {
 170       std::vector<std::string> browser_locales;
 171       l10n_util::GetParentLocales(g_browser_process->GetApplicationLocale(),
 172                                   &browser_locales);
 173
 174       size_t num_locales = supported_locales->GetSize();
 175       bool locale_supported = false;
 176       for (size_t j = 0; j < num_locales; j++) {
 177         std::string current_locale;
 178         if (supported_locales->GetString(j, &current_locale) &&
 179             l10n_util::IsValidLocaleSyntax(current_locale)) {
 180           current_locale = l10n_util::NormalizeLocale(current_locale);
 181           if (std::find(browser_locales.begin(), browser_locales.end(),
 182                         current_locale) != browser_locales.end()) {
 183             locale_supported = true;
 184             break;
 185           }
 186         } else {
 187           LOG(WARNING) << "Unrecognized locale '" << current_locale
 188                        << "' found as supported locale for extension: "
 189                        << extension_id;
 190         }
 191       }
 192
 193       if (!locale_supported) {
 194         unsupported_extensions.insert(extension_id);
 195         VLOG(1) << "Skip installing (or uninstall) external extension: "
 196                 << extension_id << " because the extension doesn't support "
 197                 << "the browser locale.";
 198         continue;
 199       }
 200     }
 201
 202     int creation_flags = creation_flags_;
 203     bool is_bookmark_app;
 204     if (extension->GetBoolean(kIsBookmarkApp, &is_bookmark_app) &&
 205         is_bookmark_app) {
 206       creation_flags |= Extension::FROM_BOOKMARK;
 207     }
 208     bool is_from_webstore = false;
 209     if (extension->GetBoolean(kIsFromWebstore, &is_from_webstore) &&
 210         is_from_webstore) {
 211       creation_flags |= Extension::FROM_WEBSTORE;
 212     }
 213     bool keep_if_present = false;
 214     if (extension->GetBoolean(kKeepIfPresent, &keep_if_present) &&
 215         keep_if_present && profile_) {
 216       ExtensionServiceInterface* extension_service =
 217           ExtensionSystem::Get(profile_)->extension_service();
 218       const Extension* extension = extension_service ?
 219           extension_service->GetExtensionById(extension_id, true) : NULL;
 220       if (!extension) {
 221         VLOG(1) << "Skip installing (or uninstall) external extension: "
 222                 << extension_id << " because the extension should be kept "
 223                 << "only if it is already installed.";
 224         continue;
 225       }
 226     }
 227     bool was_installed_by_oem = false;
 228     if (extension->GetBoolean(kWasInstalledByOem, &was_installed_by_oem) &&
 229         was_installed_by_oem) {
 230       creation_flags |= Extension::WAS_INSTALLED_BY_OEM;
 231     }
 232     bool may_be_untrusted = false;
 233     if (extension->GetBoolean(kMayBeUntrusted, &may_be_untrusted) &&
 234         may_be_untrusted) {
 235       creation_flags |= Extension::MAY_BE_UNTRUSTED;
 236     }
 237
 238     std::string install_parameter;
 239     extension->GetString(kInstallParam, &install_parameter);
 240
 241     if (has_external_crx) {
 242       if (crx_location_ == Manifest::INVALID_LOCATION) {
 243         LOG(WARNING) << "This provider does not support installing external "
 244                      << "extensions from crx files.";
 245         continue;
 246       }
 247       if (external_crx.find(base::FilePath::kParentDirectory) !=
 248           base::StringPiece::npos) {
 249         LOG(WARNING) << "Path traversal not allowed in path: "
 250                      << external_crx.c_str();
 251         continue;
 252       }
 253
 254       // If the path is relative, and the provider has a base path,
 255       // build the absolute path to the crx file.
 256       base::FilePath path(external_crx);
 257       if (!path.IsAbsolute()) {
 258         base::FilePath base_path = loader_->GetBaseCrxFilePath();
 259         if (base_path.empty()) {
 260           LOG(WARNING) << "File path " << external_crx.c_str()
 261                        << " is relative.  An absolute path is required.";
 262           continue;
 263         }
 264         path = base_path.Append(external_crx);
 265       }
 266
 267       Version version(external_version);
 268       if (!version.IsValid()) {
 269         LOG(WARNING) << "Malformed extension dictionary for extension: "
 270                      << extension_id.c_str() << ".  Invalid version string \""
 271                      << external_version << "\".";
 272         continue;
 273       }
 274       service_->OnExternalExtensionFileFound(extension_id, &version, path,
 275                                              crx_location_, creation_flags,
 276                                              auto_acknowledge_);
 277     } else {  // if (has_external_update_url)
 278       CHECK(has_external_update_url);  // Checking of keys above ensures this.
 279       if (download_location_ == Manifest::INVALID_LOCATION) {
 280         LOG(WARNING) << "This provider does not support installing external "
 281                      << "extensions from update URLs.";
 282         continue;
 283       }
 284       GURL update_url(external_update_url);
 285       if (!update_url.is_valid()) {
 286         LOG(WARNING) << "Malformed extension dictionary for extension: "
 287                      << extension_id.c_str() << ".  Key " << kExternalUpdateUrl
 288                      << " has value \"" << external_update_url
 289                      << "\", which is not a valid URL.";
 290         continue;
 291       }
 292       service_->OnExternalExtensionUpdateUrlFound(extension_id,
 293                                                   install_parameter,
 294                                                   update_url,
 295                                                   download_location_,
 296                                                   creation_flags,
 297                                                   auto_acknowledge_);
 298     }
 299   }
 300
 301   for (std::set<std::string>::iterator it = unsupported_extensions.begin();
 302        it != unsupported_extensions.end(); ++it) {
 303     // Remove extension for the list of know external extensions. The extension
 304     // will be uninstalled later because provider doesn't provide it anymore.
 305     prefs_->Remove(*it, NULL);
 306   }
 307
 308   service_->OnExternalProviderReady(this);
 309 }
 310
 311 void ExternalProviderImpl::ServiceShutdown() {
 312   service_ = NULL;
 313 }
 314
 315 bool ExternalProviderImpl::IsReady() const {
 316   return ready_;
 317 }
 318
 319 bool ExternalProviderImpl::HasExtension(
 320     const std::string& id) const {
 321   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 322   CHECK(prefs_.get());
 323   CHECK(ready_);
 324   return prefs_->HasKey(id);
 325 }
 326
 327 bool ExternalProviderImpl::GetExtensionDetails(
 328     const std::string& id, Manifest::Location* location,
 329     scoped_ptr<Version>* version) const {
 330   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 331   CHECK(prefs_.get());
 332   CHECK(ready_);
 333   base::DictionaryValue* extension = NULL;
 334   if (!prefs_->GetDictionary(id, &extension))
 335     return false;
 336
 337   Manifest::Location loc = Manifest::INVALID_LOCATION;
 338   if (extension->HasKey(kExternalUpdateUrl)) {
 339     loc = download_location_;
 340
 341   } else if (extension->HasKey(kExternalCrx)) {
 342     loc = crx_location_;
 343
 344     std::string external_version;
 345     if (!extension->GetString(kExternalVersion, &external_version))
 346       return false;
 347
 348     if (version)
 349       version->reset(new Version(external_version));
 350
 351   } else {
 352     NOTREACHED();  // Chrome should not allow prefs to get into this state.
 353     return false;
 354   }
 355
 356   if (location)
 357     *location = loc;
 358
 359   return true;
 360 }
 361
 362 // static
 363 void ExternalProviderImpl::CreateExternalProviders(
 364     VisitorInterface* service,
 365     Profile* profile,
 366     ProviderCollection* provider_list) {
 367   scoped_refptr<ExternalLoader> external_loader;
 368   scoped_refptr<ExternalLoader> external_recommended_loader;
 369   extensions::Manifest::Location crx_location = Manifest::INVALID_LOCATION;
 370 #if defined(OS_CHROMEOS)
 371   policy::BrowserPolicyConnectorChromeOS* connector =
 372       g_browser_process->platform_part()->browser_policy_connector_chromeos();
 373   bool is_chrome_os_public_session = false;
 374   const user_manager::User* user =
 375       chromeos::ProfileHelper::Get()->GetUserByProfile(profile);
 376   policy::DeviceLocalAccount::Type account_type;
 377   if (user && policy::IsDeviceLocalAccountUser(user->email(), &account_type)) {
 378     if (account_type == policy::DeviceLocalAccount::TYPE_PUBLIC_SESSION)
 379       is_chrome_os_public_session = true;
 380     policy::DeviceLocalAccountPolicyBroker* broker =
 381         connector->GetDeviceLocalAccountPolicyService()->GetBrokerForUser(
 382             user->email());
 383     if (broker) {
 384       external_loader = broker->extension_loader();
 385       crx_location = Manifest::EXTERNAL_POLICY;
 386     } else {
 387       NOTREACHED();
 388     }
 389   } else {
 390     external_loader = new ExternalPolicyLoader(
 391         ExtensionManagementFactory::GetForBrowserContext(profile),
 392         ExternalPolicyLoader::FORCED);
 393     external_recommended_loader = new ExternalPolicyLoader(
 394         ExtensionManagementFactory::GetForBrowserContext(profile),
 395         ExternalPolicyLoader::RECOMMENDED);
 396   }
 397 #else
 398   external_loader = new ExternalPolicyLoader(
 399       ExtensionManagementFactory::GetForBrowserContext(profile),
 400       ExternalPolicyLoader::FORCED);
 401   external_recommended_loader = new ExternalPolicyLoader(
 402       ExtensionManagementFactory::GetForBrowserContext(profile),
 403       ExternalPolicyLoader::RECOMMENDED);
 404 #endif
 405
 406   // Policies are mandatory so they can't be skipped with command line flag.
 407   if (external_loader.get()) {
 408     provider_list->push_back(
 409         linked_ptr<ExternalProviderInterface>(
 410             new ExternalProviderImpl(
 411                 service,
 412                 external_loader,
 413                 profile,
 414                 crx_location,
 415                 Manifest::EXTERNAL_POLICY_DOWNLOAD,
 416                 Extension::NO_FLAGS)));
 417   }
 418
 419   // Load the KioskAppExternalProvider when running in kiosk mode.
 420   if (chrome::IsRunningInForcedAppMode()) {
 421 #if defined(OS_CHROMEOS)
 422     chromeos::KioskAppManager* kiosk_app_manager =
 423         chromeos::KioskAppManager::Get();
 424     DCHECK(kiosk_app_manager);
 425     if (kiosk_app_manager && !kiosk_app_manager->external_loader_created()) {
 426       provider_list->push_back(linked_ptr<ExternalProviderInterface>(
 427           new ExternalProviderImpl(service,
 428                                    kiosk_app_manager->CreateExternalLoader(),
 429                                    profile,
 430                                    Manifest::EXTERNAL_PREF,
 431                                    Manifest::INVALID_LOCATION,
 432                                    Extension::NO_FLAGS)));
 433     }
 434 #endif
 435     return;
 436   }
 437
 438   // Extensions provided by recommended policies.
 439   if (external_recommended_loader.get()) {
 440     provider_list->push_back(linked_ptr<ExternalProviderInterface>(
 441         new ExternalProviderImpl(service,
 442                                  external_recommended_loader,
 443                                  profile,
 444                                  crx_location,
 445                                  Manifest::EXTERNAL_PREF_DOWNLOAD,
 446                                  Extension::NO_FLAGS)));
 447   }
 448
 449   // In tests don't install extensions from default external sources.
 450   // It would only slowdown tests and make them flaky.
 451   if (CommandLine::ForCurrentProcess()->HasSwitch(
 452       switches::kDisableDefaultApps))
 453     return;
 454
 455   // On Mac OS, items in /Library/... should be written by the superuser.
 456   // Check that all components of the path are writable by root only.
 457   ExternalPrefLoader::Options check_admin_permissions_on_mac;
 458 #if defined(OS_MACOSX)
 459   check_admin_permissions_on_mac =
 460     ExternalPrefLoader::ENSURE_PATH_CONTROLLED_BY_ADMIN;
 461 #else
 462   check_admin_permissions_on_mac = ExternalPrefLoader::NONE;
 463 #endif
 464
 465   bool is_chromeos_demo_session = false;
 466   int bundled_extension_creation_flags = Extension::NO_FLAGS;
 467 #if defined(OS_CHROMEOS)
 468   user_manager::UserManager* user_manager = user_manager::UserManager::Get();
 469   is_chromeos_demo_session =
 470       user_manager && user_manager->IsLoggedInAsDemoUser() &&
 471       connector->GetDeviceMode() == policy::DEVICE_MODE_RETAIL_KIOSK;
 472   bundled_extension_creation_flags = Extension::FROM_WEBSTORE |
 473       Extension::WAS_INSTALLED_BY_DEFAULT;
 474 #endif
 475
 476 #if defined(OS_LINUX) && !defined(OS_CHROMEOS)
 477   if (!profile->IsSupervised()) {
 478     provider_list->push_back(
 479         linked_ptr<ExternalProviderInterface>(
 480             new ExternalProviderImpl(
 481                 service,
 482                 new ExternalPrefLoader(
 483                     chrome::DIR_STANDALONE_EXTERNAL_EXTENSIONS,
 484                     ExternalPrefLoader::NONE,
 485                     NULL),
 486                 profile,
 487                 Manifest::EXTERNAL_PREF,
 488                 Manifest::EXTERNAL_PREF_DOWNLOAD,
 489                 bundled_extension_creation_flags)));
 490   }
 491 #endif
 492
 493 #if defined(OS_CHROMEOS)
 494   if (!is_chromeos_demo_session && !is_chrome_os_public_session) {
 495     int external_apps_path_id = profile->IsSupervised() ?
 496         chrome::DIR_SUPERVISED_USERS_DEFAULT_APPS :
 497         chrome::DIR_STANDALONE_EXTERNAL_EXTENSIONS;
 498     ExternalPrefLoader::Options pref_load_flags = profile->IsNewProfile() ?
 499         ExternalPrefLoader::DELAY_LOAD_UNTIL_PRIORITY_SYNC :
 500         ExternalPrefLoader::NONE;
 501     provider_list->push_back(
 502         linked_ptr<ExternalProviderInterface>(new ExternalProviderImpl(
 503             service,
 504             new ExternalPrefLoader(external_apps_path_id,
 505                                    pref_load_flags,
 506                                    profile),
 507             profile,
 508             Manifest::EXTERNAL_PREF,
 509             Manifest::EXTERNAL_PREF_DOWNLOAD,
 510             bundled_extension_creation_flags)));
 511
 512     // OEM default apps.
 513     int oem_extension_creation_flags =
 514         bundled_extension_creation_flags | Extension::WAS_INSTALLED_BY_OEM;
 515     chromeos::ServicesCustomizationDocument* customization =
 516         chromeos::ServicesCustomizationDocument::GetInstance();
 517     provider_list->push_back(linked_ptr<ExternalProviderInterface>(
 518         new ExternalProviderImpl(service,
 519                                  customization->CreateExternalLoader(profile),
 520                                  profile,
 521                                  Manifest::EXTERNAL_PREF,
 522                                  Manifest::EXTERNAL_PREF_DOWNLOAD,
 523                                  oem_extension_creation_flags)));
 524   }
 525
 526   policy::AppPackUpdater* app_pack_updater = connector->GetAppPackUpdater();
 527   if (is_chromeos_demo_session && app_pack_updater &&
 528       !app_pack_updater->created_external_loader()) {
 529     provider_list->push_back(
 530         linked_ptr<ExternalProviderInterface>(
 531           new ExternalProviderImpl(
 532               service,
 533               app_pack_updater->CreateExternalLoader(),
 534               profile,
 535               Manifest::EXTERNAL_PREF,
 536               Manifest::INVALID_LOCATION,
 537               Extension::NO_FLAGS)));
 538   }
 539 #endif
 540
 541   if (!profile->IsSupervised() && !is_chromeos_demo_session) {
 542 #if !defined(OS_WIN)
 543     provider_list->push_back(
 544         linked_ptr<ExternalProviderInterface>(
 545             new ExternalProviderImpl(
 546                 service,
 547                 new ExternalPrefLoader(chrome::DIR_EXTERNAL_EXTENSIONS,
 548                                        check_admin_permissions_on_mac,
 549                                        NULL),
 550                 profile,
 551                 Manifest::EXTERNAL_PREF,
 552                 Manifest::EXTERNAL_PREF_DOWNLOAD,
 553                 bundled_extension_creation_flags)));
 554 #endif
 555
 556     // Define a per-user source of external extensions.
 557 #if defined(OS_MACOSX)
 558     provider_list->push_back(
 559         linked_ptr<ExternalProviderInterface>(
 560             new ExternalProviderImpl(
 561                 service,
 562                 new ExternalPrefLoader(chrome::DIR_USER_EXTERNAL_EXTENSIONS,
 563                                        ExternalPrefLoader::NONE,
 564                                        NULL),
 565                 profile,
 566                 Manifest::EXTERNAL_PREF,
 567                 Manifest::EXTERNAL_PREF_DOWNLOAD,
 568                 Extension::NO_FLAGS)));
 569 #endif
 570
 571 #if defined(OS_WIN)
 572     provider_list->push_back(
 573         linked_ptr<ExternalProviderInterface>(
 574             new ExternalProviderImpl(
 575                 service,
 576                 new ExternalRegistryLoader,
 577                 profile,
 578                 Manifest::EXTERNAL_REGISTRY,
 579                 Manifest::EXTERNAL_PREF_DOWNLOAD,
 580                 Extension::NO_FLAGS)));
 581 #endif
 582
 583 #if !defined(OS_CHROMEOS)
 584     // The default apps are installed as INTERNAL but use the external
 585     // extension installer codeflow.
 586     provider_list->push_back(
 587         linked_ptr<ExternalProviderInterface>(
 588             new default_apps::Provider(
 589                 profile,
 590                 service,
 591                 new ExternalPrefLoader(chrome::DIR_DEFAULT_APPS,
 592                                        ExternalPrefLoader::NONE,
 593                                        NULL),
 594                 Manifest::INTERNAL,
 595                 Manifest::INTERNAL,
 596                 Extension::FROM_WEBSTORE |
 597                     Extension::WAS_INSTALLED_BY_DEFAULT)));
 598 #endif
 599
 600     provider_list->push_back(
 601       linked_ptr<ExternalProviderInterface>(
 602         new ExternalProviderImpl(
 603             service,
 604             new ExternalComponentLoader(profile),
 605             profile,
 606             Manifest::INVALID_LOCATION,
 607             Manifest::EXTERNAL_COMPONENT,
 608             Extension::FROM_WEBSTORE | Extension::WAS_INSTALLED_BY_DEFAULT)));
 609   }
 610 }
 611
 612 }  // namespace extensions