extensions/browser/extension_prefs.cc

   1 // Copyright 2014 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 "extensions/browser/extension_prefs.h"
   6
   7 #include <iterator>
   8
   9 #include "base/command_line.h"
  10 #include "base/prefs/pref_notifier.h"
  11 #include "base/prefs/pref_service.h"
  12 #include "base/strings/string_number_conversions.h"
  13 #include "base/strings/string_util.h"
  14 #include "base/value_conversions.h"
  15 #include "components/crx_file/id_util.h"
  16 #include "components/pref_registry/pref_registry_syncable.h"
  17 #include "extensions/browser/app_sorting.h"
  18 #include "extensions/browser/event_router.h"
  19 #include "extensions/browser/extension_pref_store.h"
  20 #include "extensions/browser/extension_prefs_factory.h"
  21 #include "extensions/browser/extension_prefs_observer.h"
  22 #include "extensions/browser/install_flag.h"
  23 #include "extensions/browser/pref_names.h"
  24 #include "extensions/common/feature_switch.h"
  25 #include "extensions/common/manifest.h"
  26 #include "extensions/common/permissions/permission_set.h"
  27 #include "extensions/common/permissions/permissions_info.h"
  28 #include "extensions/common/url_pattern.h"
  29 #include "extensions/common/user_script.h"
  30 #include "ui/base/l10n/l10n_util.h"
  31
  32 using base::Value;
  33 using base::DictionaryValue;
  34 using base::ListValue;
  35
  36 namespace extensions {
  37
  38 namespace {
  39
  40 // Additional preferences keys, which are not needed by external clients.
  41
  42 // True if this extension is running. Note this preference stops getting updated
  43 // during Chrome shutdown (and won't be updated on a browser crash) and so can
  44 // be used at startup to determine whether the extension was running when Chrome
  45 // was last terminated.
  46 const char kPrefRunning[] = "running";
  47
  48 // Whether this extension had windows when it was last running.
  49 const char kIsActive[] = "is_active";
  50
  51 // Where an extension was installed from. (see Manifest::Location)
  52 const char kPrefLocation[] = "location";
  53
  54 // Enabled, disabled, killed, etc. (see Extension::State)
  55 const char kPrefState[] = "state";
  56
  57 // The path to the current version's manifest file.
  58 const char kPrefPath[] = "path";
  59
  60 // The dictionary containing the extension's manifest.
  61 const char kPrefManifest[] = "manifest";
  62
  63 // The version number.
  64 const char kPrefVersion[] = "manifest.version";
  65
  66 // Indicates whether an extension is blacklisted.
  67 const char kPrefBlacklist[] = "blacklist";
  68
  69 // If extension is greylisted.
  70 const char kPrefBlacklistState[] = "blacklist_state";
  71
  72 // The count of how many times we prompted the user to acknowledge an
  73 // extension.
  74 const char kPrefAcknowledgePromptCount[] = "ack_prompt_count";
  75
  76 // Indicates whether the user has acknowledged various types of extensions.
  77 const char kPrefExternalAcknowledged[] = "ack_external";
  78 const char kPrefBlacklistAcknowledged[] = "ack_blacklist";
  79 const char kPrefWipeoutAcknowledged[] = "ack_wiped";
  80 const char kPrefSettingsBubbleAcknowledged[] = "ack_settings_bubble";
  81 const char kPrefNtpBubbleAcknowledged[] = "ack_ntp_bubble";
  82 const char kPrefProxyBubbleAcknowledged[] = "ack_proxy_bubble";
  83
  84 // Indicates whether the external extension was installed during the first
  85 // run of this profile.
  86 const char kPrefExternalInstallFirstRun[] = "external_first_run";
  87
  88 // Indicates whether to show an install warning when the user enables.
  89 const char kExtensionDidEscalatePermissions[] = "install_warning_on_enable";
  90
  91 // DO NOT USE, use kPrefDisableReasons instead.
  92 // Indicates whether the extension was updated while it was disabled.
  93 const char kDeprecatedPrefDisableReason[] = "disable_reason";
  94
  95 // A bitmask of all the reasons an extension is disabled.
  96 const char kPrefDisableReasons[] = "disable_reasons";
  97
  98 // The key for a serialized Time value indicating the start of the day (from the
  99 // server's perspective) an extension last included a "ping" parameter during
 100 // its update check.
 101 const char kLastPingDay[] = "lastpingday";
 102
 103 // Similar to kLastPingDay, but for "active" instead of "rollcall" pings.
 104 const char kLastActivePingDay[] = "last_active_pingday";
 105
 106 // A bit we use to keep track of whether we need to do an "active" ping.
 107 const char kActiveBit[] = "active_bit";
 108
 109 // Path for settings specific to blacklist update.
 110 const char kExtensionsBlacklistUpdate[] = "extensions.blacklistupdate";
 111
 112 // Path for the delayed install info dictionary preference. The actual string
 113 // value is a legacy artifact for when delayed installs only pertained to
 114 // updates that were waiting for idle.
 115 const char kDelayedInstallInfo[] = "idle_install_info";
 116
 117 // Reason why the extension's install was delayed.
 118 const char kDelayedInstallReason[] = "delay_install_reason";
 119
 120 // Path for the suggested page ordinal of a delayed extension install.
 121 const char kPrefSuggestedPageOrdinal[] = "suggested_page_ordinal";
 122
 123 // A preference that, if true, will allow this extension to run in incognito
 124 // mode.
 125 const char kPrefIncognitoEnabled[] = "incognito";
 126
 127 // A preference to control whether an extension is allowed to inject script in
 128 // pages with file URLs.
 129 const char kPrefAllowFileAccess[] = "newAllowFileAccess";
 130 // TODO(jstritar): As part of fixing http://crbug.com/91577, we revoked all
 131 // extension file access by renaming the pref. We should eventually clean up
 132 // the old flag and possibly go back to that name.
 133 // const char kPrefAllowFileAccessOld[] = "allowFileAccess";
 134
 135 // A preference specifying if the user dragged the app on the NTP.
 136 const char kPrefUserDraggedApp[] = "user_dragged_app_ntp";
 137
 138 // Preferences that hold which permissions the user has granted the extension.
 139 // We explicitly keep track of these so that extensions can contain unknown
 140 // permissions, for backwards compatibility reasons, and we can still prompt
 141 // the user to accept them once recognized. We store the active permission
 142 // permissions because they may differ from those defined in the manifest.
 143 const char kPrefActivePermissions[] = "active_permissions";
 144 const char kPrefGrantedPermissions[] = "granted_permissions";
 145
 146 // The preference names for PermissionSet values.
 147 const char kPrefAPIs[] = "api";
 148 const char kPrefManifestPermissions[] = "manifest_permissions";
 149 const char kPrefExplicitHosts[] = "explicit_host";
 150 const char kPrefScriptableHosts[] = "scriptable_host";
 151
 152 // The preference names for the old granted permissions scheme.
 153 const char kPrefOldGrantedFullAccess[] = "granted_permissions.full";
 154 const char kPrefOldGrantedHosts[] = "granted_permissions.host";
 155 const char kPrefOldGrantedAPIs[] = "granted_permissions.api";
 156
 157 // A preference that indicates when an extension was installed.
 158 const char kPrefInstallTime[] = "install_time";
 159
 160 // A preference which saves the creation flags for extensions.
 161 const char kPrefCreationFlags[] = "creation_flags";
 162
 163 // A preference that indicates whether the extension was installed from the
 164 // Chrome Web Store.
 165 const char kPrefFromWebStore[] = "from_webstore";
 166
 167 // A preference that indicates whether the extension was installed from a
 168 // mock App created from a bookmark.
 169 const char kPrefFromBookmark[] = "from_bookmark";
 170
 171 // A preference that indicates whether the extension was installed as a
 172 // default app.
 173 const char kPrefWasInstalledByDefault[] = "was_installed_by_default";
 174
 175 // A preference that indicates whether the extension was installed as an
 176 // OEM app.
 177 const char kPrefWasInstalledByOem[] = "was_installed_by_oem";
 178
 179 // Key for Geometry Cache preference.
 180 const char kPrefGeometryCache[] = "geometry_cache";
 181
 182 // A preference that indicates when an extension is last launched.
 183 const char kPrefLastLaunchTime[] = "last_launch_time";
 184
 185 // A preference indicating whether the extension is an ephemeral app.
 186 const char kPrefEphemeralApp[] = "ephemeral_app";
 187
 188 // Am installation parameter bundled with an extension.
 189 const char kPrefInstallParam[] = "install_parameter";
 190
 191 // A list of installed ids and a signature.
 192 const char kInstallSignature[] = "extensions.install_signature";
 193
 194 // A boolean preference that indicates whether the extension should not be
 195 // synced. Default value is false.
 196 const char kPrefDoNotSync[] = "do_not_sync";
 197
 198 const char kCorruptedDisableCount[] = "extensions.corrupted_disable_count";
 199
 200 // Provider of write access to a dictionary storing extension prefs.
 201 class ScopedExtensionPrefUpdate : public DictionaryPrefUpdate {
 202  public:
 203   ScopedExtensionPrefUpdate(PrefService* service,
 204                             const std::string& extension_id) :
 205     DictionaryPrefUpdate(service, pref_names::kExtensions),
 206     extension_id_(extension_id) {}
 207
 208   virtual ~ScopedExtensionPrefUpdate() {
 209   }
 210
 211   // DictionaryPrefUpdate overrides:
 212   virtual base::DictionaryValue* Get() OVERRIDE {
 213     base::DictionaryValue* dict = DictionaryPrefUpdate::Get();
 214     base::DictionaryValue* extension = NULL;
 215     if (!dict->GetDictionary(extension_id_, &extension)) {
 216       // Extension pref does not exist, create it.
 217       extension = new base::DictionaryValue();
 218       dict->SetWithoutPathExpansion(extension_id_, extension);
 219     }
 220     return extension;
 221   }
 222
 223  private:
 224   const std::string extension_id_;
 225
 226   DISALLOW_COPY_AND_ASSIGN(ScopedExtensionPrefUpdate);
 227 };
 228
 229 std::string JoinPrefs(const std::string& parent, const char* child) {
 230   return parent + "." + child;
 231 }
 232
 233 // Checks if kPrefBlacklist is set to true in the base::DictionaryValue.
 234 // Return false if the value is false or kPrefBlacklist does not exist.
 235 // This is used to decide if an extension is blacklisted.
 236 bool IsBlacklistBitSet(const base::DictionaryValue* ext) {
 237   bool bool_value;
 238   return ext->GetBoolean(kPrefBlacklist, &bool_value) && bool_value;
 239 }
 240
 241 void LoadExtensionControlledPrefs(ExtensionPrefs* prefs,
 242                                   ExtensionPrefValueMap* value_map,
 243                                   const std::string& extension_id,
 244                                   ExtensionPrefsScope scope) {
 245   std::string scope_string;
 246   if (!pref_names::ScopeToPrefName(scope, &scope_string))
 247     return;
 248   std::string key = extension_id + "." + scope_string;
 249
 250   const base::DictionaryValue* source_dict =
 251       prefs->pref_service()->GetDictionary(pref_names::kExtensions);
 252   const base::DictionaryValue* preferences = NULL;
 253   if (!source_dict->GetDictionary(key, &preferences))
 254     return;
 255
 256   for (base::DictionaryValue::Iterator iter(*preferences); !iter.IsAtEnd();
 257        iter.Advance()) {
 258     value_map->SetExtensionPref(
 259         extension_id, iter.key(), scope, iter.value().DeepCopy());
 260   }
 261 }
 262
 263 }  // namespace
 264
 265 //
 266 // TimeProvider
 267 //
 268
 269 ExtensionPrefs::TimeProvider::TimeProvider() {
 270 }
 271
 272 ExtensionPrefs::TimeProvider::~TimeProvider() {
 273 }
 274
 275 base::Time ExtensionPrefs::TimeProvider::GetCurrentTime() const {
 276   return base::Time::Now();
 277 }
 278
 279 //
 280 // ScopedUpdate
 281 //
 282 template <typename T, base::Value::Type type_enum_value>
 283 ExtensionPrefs::ScopedUpdate<T, type_enum_value>::ScopedUpdate(
 284     ExtensionPrefs* prefs,
 285     const std::string& extension_id,
 286     const std::string& key)
 287     : update_(prefs->pref_service(), pref_names::kExtensions),
 288       extension_id_(extension_id),
 289       key_(key) {
 290   DCHECK(crx_file::id_util::IdIsValid(extension_id_));
 291 }
 292
 293 template <typename T, base::Value::Type type_enum_value>
 294 ExtensionPrefs::ScopedUpdate<T, type_enum_value>::~ScopedUpdate() {
 295 }
 296
 297 template <typename T, base::Value::Type type_enum_value>
 298 T* ExtensionPrefs::ScopedUpdate<T, type_enum_value>::Get() {
 299   base::DictionaryValue* dict = update_.Get();
 300   base::DictionaryValue* extension = NULL;
 301   base::Value* key_value = NULL;
 302   if (!dict->GetDictionary(extension_id_, &extension) ||
 303       !extension->Get(key_, &key_value)) {
 304     return NULL;
 305   }
 306   return key_value->GetType() == type_enum_value ?
 307       static_cast<T*>(key_value) :
 308       NULL;
 309 }
 310
 311 template <typename T, base::Value::Type type_enum_value>
 312 T* ExtensionPrefs::ScopedUpdate<T, type_enum_value>::Create() {
 313   base::DictionaryValue* dict = update_.Get();
 314   base::DictionaryValue* extension = NULL;
 315   base::Value* key_value = NULL;
 316   T* value_as_t = NULL;
 317   if (!dict->GetDictionary(extension_id_, &extension)) {
 318     extension = new base::DictionaryValue;
 319     dict->SetWithoutPathExpansion(extension_id_, extension);
 320   }
 321   if (!extension->Get(key_, &key_value)) {
 322     value_as_t = new T;
 323     extension->SetWithoutPathExpansion(key_, value_as_t);
 324   } else {
 325     CHECK(key_value->GetType() == type_enum_value);
 326     value_as_t = static_cast<T*>(key_value);
 327   }
 328   return value_as_t;
 329 }
 330
 331 // Explicit instantiations for Dictionary and List value types.
 332 template class ExtensionPrefs::ScopedUpdate<base::DictionaryValue,
 333                                             base::Value::TYPE_DICTIONARY>;
 334 template class ExtensionPrefs::ScopedUpdate<base::ListValue,
 335                                             base::Value::TYPE_LIST>;
 336
 337 //
 338 // ExtensionPrefs
 339 //
 340
 341 // static
 342 ExtensionPrefs* ExtensionPrefs::Create(
 343     PrefService* prefs,
 344     const base::FilePath& root_dir,
 345     ExtensionPrefValueMap* extension_pref_value_map,
 346     scoped_ptr<AppSorting> app_sorting,
 347     bool extensions_disabled,
 348     const std::vector<ExtensionPrefsObserver*>& early_observers) {
 349   return ExtensionPrefs::Create(prefs,
 350                                 root_dir,
 351                                 extension_pref_value_map,
 352                                 app_sorting.Pass(),
 353                                 extensions_disabled,
 354                                 early_observers,
 355                                 make_scoped_ptr(new TimeProvider()));
 356 }
 357
 358 // static
 359 ExtensionPrefs* ExtensionPrefs::Create(
 360     PrefService* pref_service,
 361     const base::FilePath& root_dir,
 362     ExtensionPrefValueMap* extension_pref_value_map,
 363     scoped_ptr<AppSorting> app_sorting,
 364     bool extensions_disabled,
 365     const std::vector<ExtensionPrefsObserver*>& early_observers,
 366     scoped_ptr<TimeProvider> time_provider) {
 367   return new ExtensionPrefs(pref_service,
 368                             root_dir,
 369                             extension_pref_value_map,
 370                             app_sorting.Pass(),
 371                             time_provider.Pass(),
 372                             extensions_disabled,
 373                             early_observers);
 374 }
 375
 376 ExtensionPrefs::~ExtensionPrefs() {
 377 }
 378
 379 // static
 380 ExtensionPrefs* ExtensionPrefs::Get(content::BrowserContext* context) {
 381   return ExtensionPrefsFactory::GetInstance()->GetForBrowserContext(context);
 382 }
 383
 384 static base::FilePath::StringType MakePathRelative(const base::FilePath& parent,
 385                                              const base::FilePath& child) {
 386   if (!parent.IsParent(child))
 387     return child.value();
 388
 389   base::FilePath::StringType retval = child.value().substr(
 390       parent.value().length());
 391   if (base::FilePath::IsSeparator(retval[0]))
 392     return retval.substr(1);
 393   else
 394     return retval;
 395 }
 396
 397 void ExtensionPrefs::MakePathsRelative() {
 398   const base::DictionaryValue* dict =
 399       prefs_->GetDictionary(pref_names::kExtensions);
 400   if (!dict || dict->empty())
 401     return;
 402
 403   // Collect all extensions ids with absolute paths in |absolute_keys|.
 404   std::set<std::string> absolute_keys;
 405   for (base::DictionaryValue::Iterator i(*dict); !i.IsAtEnd(); i.Advance()) {
 406     const base::DictionaryValue* extension_dict = NULL;
 407     if (!i.value().GetAsDictionary(&extension_dict))
 408       continue;
 409     int location_value;
 410     if (extension_dict->GetInteger(kPrefLocation, &location_value) &&
 411         Manifest::IsUnpackedLocation(
 412             static_cast<Manifest::Location>(location_value))) {
 413       // Unpacked extensions can have absolute paths.
 414       continue;
 415     }
 416     base::FilePath::StringType path_string;
 417     if (!extension_dict->GetString(kPrefPath, &path_string))
 418       continue;
 419     base::FilePath path(path_string);
 420     if (path.IsAbsolute())
 421       absolute_keys.insert(i.key());
 422   }
 423   if (absolute_keys.empty())
 424     return;
 425
 426   // Fix these paths.
 427   DictionaryPrefUpdate update(prefs_, pref_names::kExtensions);
 428   base::DictionaryValue* update_dict = update.Get();
 429   for (std::set<std::string>::iterator i = absolute_keys.begin();
 430        i != absolute_keys.end(); ++i) {
 431     base::DictionaryValue* extension_dict = NULL;
 432     if (!update_dict->GetDictionaryWithoutPathExpansion(*i, &extension_dict)) {
 433       NOTREACHED() << "Control should never reach here for extension " << *i;
 434       continue;
 435     }
 436     base::FilePath::StringType path_string;
 437     extension_dict->GetString(kPrefPath, &path_string);
 438     base::FilePath path(path_string);
 439     extension_dict->SetString(kPrefPath,
 440         MakePathRelative(install_directory_, path));
 441   }
 442 }
 443
 444 const base::DictionaryValue* ExtensionPrefs::GetExtensionPref(
 445     const std::string& extension_id) const {
 446   const base::DictionaryValue* extensions =
 447       prefs_->GetDictionary(pref_names::kExtensions);
 448   const base::DictionaryValue* extension_dict = NULL;
 449   if (!extensions ||
 450       !extensions->GetDictionary(extension_id, &extension_dict)) {
 451     return NULL;
 452   }
 453   return extension_dict;
 454 }
 455
 456 void ExtensionPrefs::UpdateExtensionPref(const std::string& extension_id,
 457                                          const std::string& key,
 458                                          base::Value* data_value) {
 459   if (!crx_file::id_util::IdIsValid(extension_id)) {
 460     NOTREACHED() << "Invalid extension_id " << extension_id;
 461     return;
 462   }
 463   ScopedExtensionPrefUpdate update(prefs_, extension_id);
 464   if (data_value)
 465     update->Set(key, data_value);
 466   else
 467     update->Remove(key, NULL);
 468 }
 469
 470 void ExtensionPrefs::DeleteExtensionPrefs(const std::string& extension_id) {
 471   extension_pref_value_map_->UnregisterExtension(extension_id);
 472   FOR_EACH_OBSERVER(ExtensionPrefsObserver,
 473                     observer_list_,
 474                     OnExtensionPrefsDeleted(extension_id));
 475   DictionaryPrefUpdate update(prefs_, pref_names::kExtensions);
 476   base::DictionaryValue* dict = update.Get();
 477   dict->Remove(extension_id, NULL);
 478 }
 479
 480 bool ExtensionPrefs::ReadPrefAsBoolean(const std::string& extension_id,
 481                                        const std::string& pref_key,
 482                                        bool* out_value) const {
 483   const base::DictionaryValue* ext = GetExtensionPref(extension_id);
 484   if (!ext || !ext->GetBoolean(pref_key, out_value))
 485     return false;
 486
 487   return true;
 488 }
 489
 490 bool ExtensionPrefs::ReadPrefAsInteger(const std::string& extension_id,
 491                                        const std::string& pref_key,
 492                                        int* out_value) const {
 493   const base::DictionaryValue* ext = GetExtensionPref(extension_id);
 494   if (!ext || !ext->GetInteger(pref_key, out_value))
 495     return false;
 496
 497   return true;
 498 }
 499
 500 bool ExtensionPrefs::ReadPrefAsString(const std::string& extension_id,
 501                                       const std::string& pref_key,
 502                                       std::string* out_value) const {
 503   const base::DictionaryValue* ext = GetExtensionPref(extension_id);
 504   if (!ext || !ext->GetString(pref_key, out_value))
 505     return false;
 506
 507   return true;
 508 }
 509
 510 bool ExtensionPrefs::ReadPrefAsList(const std::string& extension_id,
 511                                     const std::string& pref_key,
 512                                     const base::ListValue** out_value) const {
 513   const base::DictionaryValue* ext = GetExtensionPref(extension_id);
 514   const base::ListValue* out = NULL;
 515   if (!ext || !ext->GetList(pref_key, &out))
 516     return false;
 517   if (out_value)
 518     *out_value = out;
 519
 520   return true;
 521 }
 522
 523 bool ExtensionPrefs::ReadPrefAsDictionary(
 524     const std::string& extension_id,
 525     const std::string& pref_key,
 526     const base::DictionaryValue** out_value) const {
 527   const base::DictionaryValue* ext = GetExtensionPref(extension_id);
 528   const base::DictionaryValue* out = NULL;
 529   if (!ext || !ext->GetDictionary(pref_key, &out))
 530     return false;
 531   if (out_value)
 532     *out_value = out;
 533
 534   return true;
 535 }
 536
 537 bool ExtensionPrefs::HasPrefForExtension(
 538     const std::string& extension_id) const {
 539   return GetExtensionPref(extension_id) != NULL;
 540 }
 541
 542 bool ExtensionPrefs::ReadPrefAsURLPatternSet(const std::string& extension_id,
 543                                              const std::string& pref_key,
 544                                              URLPatternSet* result,
 545                                              int valid_schemes) {
 546   const base::ListValue* value = NULL;
 547   if (!ReadPrefAsList(extension_id, pref_key, &value))
 548     return false;
 549
 550   bool allow_file_access = AllowFileAccess(extension_id);
 551   return result->Populate(*value, valid_schemes, allow_file_access, NULL);
 552 }
 553
 554 void ExtensionPrefs::SetExtensionPrefURLPatternSet(
 555     const std::string& extension_id,
 556     const std::string& pref_key,
 557     const URLPatternSet& new_value) {
 558   UpdateExtensionPref(extension_id, pref_key, new_value.ToValue().release());
 559 }
 560
 561 bool ExtensionPrefs::ReadPrefAsBooleanAndReturn(
 562     const std::string& extension_id,
 563     const std::string& pref_key) const {
 564   bool out_value = false;
 565   return ReadPrefAsBoolean(extension_id, pref_key, &out_value) && out_value;
 566 }
 567
 568 PermissionSet* ExtensionPrefs::ReadPrefAsPermissionSet(
 569     const std::string& extension_id,
 570     const std::string& pref_key) {
 571   if (!GetExtensionPref(extension_id))
 572     return NULL;
 573
 574   // Retrieve the API permissions. Please refer SetExtensionPrefPermissionSet()
 575   // for api_values format.
 576   APIPermissionSet apis;
 577   const base::ListValue* api_values = NULL;
 578   std::string api_pref = JoinPrefs(pref_key, kPrefAPIs);
 579   if (ReadPrefAsList(extension_id, api_pref, &api_values)) {
 580     APIPermissionSet::ParseFromJSON(api_values,
 581                                     APIPermissionSet::kAllowInternalPermissions,
 582                                     &apis, NULL, NULL);
 583   }
 584
 585   // Retrieve the Manifest Keys permissions. Please refer to
 586   // |SetExtensionPrefPermissionSet| for manifest_permissions_values format.
 587   ManifestPermissionSet manifest_permissions;
 588   const base::ListValue* manifest_permissions_values = NULL;
 589   std::string manifest_permission_pref =
 590       JoinPrefs(pref_key, kPrefManifestPermissions);
 591   if (ReadPrefAsList(extension_id, manifest_permission_pref,
 592                      &manifest_permissions_values)) {
 593     ManifestPermissionSet::ParseFromJSON(
 594         manifest_permissions_values, &manifest_permissions, NULL, NULL);
 595   }
 596
 597   // Retrieve the explicit host permissions.
 598   URLPatternSet explicit_hosts;
 599   ReadPrefAsURLPatternSet(
 600       extension_id, JoinPrefs(pref_key, kPrefExplicitHosts),
 601       &explicit_hosts, Extension::kValidHostPermissionSchemes);
 602
 603   // Retrieve the scriptable host permissions.
 604   URLPatternSet scriptable_hosts;
 605   ReadPrefAsURLPatternSet(
 606       extension_id, JoinPrefs(pref_key, kPrefScriptableHosts),
 607       &scriptable_hosts, UserScript::ValidUserScriptSchemes());
 608
 609   return new PermissionSet(
 610       apis, manifest_permissions, explicit_hosts, scriptable_hosts);
 611 }
 612
 613 // Set the API or Manifest permissions.
 614 // The format of api_values is:
 615 // [ "permission_name1",   // permissions do not support detail.
 616 //   "permission_name2",
 617 //   {"permission_name3": value },
 618 //   // permission supports detail, permission detail will be stored in value.
 619 //   ...
 620 // ]
 621 template<typename T>
 622 static base::ListValue* CreatePermissionList(const T& permissions) {
 623   base::ListValue* values = new base::ListValue();
 624   for (typename T::const_iterator i = permissions.begin();
 625       i != permissions.end(); ++i) {
 626     scoped_ptr<base::Value> detail(i->ToValue());
 627     if (detail) {
 628       base::DictionaryValue* tmp = new base::DictionaryValue();
 629       tmp->Set(i->name(), detail.release());
 630       values->Append(tmp);
 631     } else {
 632       values->Append(new base::StringValue(i->name()));
 633     }
 634   }
 635   return values;
 636 }
 637
 638 void ExtensionPrefs::SetExtensionPrefPermissionSet(
 639     const std::string& extension_id,
 640     const std::string& pref_key,
 641     const PermissionSet* new_value) {
 642   std::string api_pref = JoinPrefs(pref_key, kPrefAPIs);
 643   base::ListValue* api_values = CreatePermissionList(new_value->apis());
 644   UpdateExtensionPref(extension_id, api_pref, api_values);
 645
 646   std::string manifest_permissions_pref =
 647       JoinPrefs(pref_key, kPrefManifestPermissions);
 648   base::ListValue* manifest_permissions_values = CreatePermissionList(
 649       new_value->manifest_permissions());
 650   UpdateExtensionPref(extension_id,
 651                       manifest_permissions_pref,
 652                       manifest_permissions_values);
 653
 654   // Set the explicit host permissions.
 655   if (!new_value->explicit_hosts().is_empty()) {
 656     SetExtensionPrefURLPatternSet(extension_id,
 657                                   JoinPrefs(pref_key, kPrefExplicitHosts),
 658                                   new_value->explicit_hosts());
 659   }
 660
 661   // Set the scriptable host permissions.
 662   if (!new_value->scriptable_hosts().is_empty()) {
 663     SetExtensionPrefURLPatternSet(extension_id,
 664                                   JoinPrefs(pref_key, kPrefScriptableHosts),
 665                                   new_value->scriptable_hosts());
 666   }
 667 }
 668
 669 int ExtensionPrefs::IncrementAcknowledgePromptCount(
 670     const std::string& extension_id) {
 671   int count = 0;
 672   ReadPrefAsInteger(extension_id, kPrefAcknowledgePromptCount, &count);
 673   ++count;
 674   UpdateExtensionPref(extension_id, kPrefAcknowledgePromptCount,
 675                       new base::FundamentalValue(count));
 676   return count;
 677 }
 678
 679 bool ExtensionPrefs::IsExternalExtensionAcknowledged(
 680     const std::string& extension_id) {
 681   return ReadPrefAsBooleanAndReturn(extension_id, kPrefExternalAcknowledged);
 682 }
 683
 684 void ExtensionPrefs::AcknowledgeExternalExtension(
 685     const std::string& extension_id) {
 686   DCHECK(crx_file::id_util::IdIsValid(extension_id));
 687   UpdateExtensionPref(extension_id, kPrefExternalAcknowledged,
 688                       new base::FundamentalValue(true));
 689   UpdateExtensionPref(extension_id, kPrefAcknowledgePromptCount, NULL);
 690 }
 691
 692 bool ExtensionPrefs::IsBlacklistedExtensionAcknowledged(
 693     const std::string& extension_id) {
 694   return ReadPrefAsBooleanAndReturn(extension_id, kPrefBlacklistAcknowledged);
 695 }
 696
 697 void ExtensionPrefs::AcknowledgeBlacklistedExtension(
 698     const std::string& extension_id) {
 699   DCHECK(crx_file::id_util::IdIsValid(extension_id));
 700   UpdateExtensionPref(extension_id, kPrefBlacklistAcknowledged,
 701                       new base::FundamentalValue(true));
 702   UpdateExtensionPref(extension_id, kPrefAcknowledgePromptCount, NULL);
 703 }
 704
 705 bool ExtensionPrefs::IsExternalInstallFirstRun(
 706     const std::string& extension_id) {
 707   return ReadPrefAsBooleanAndReturn(extension_id, kPrefExternalInstallFirstRun);
 708 }
 709
 710 void ExtensionPrefs::SetExternalInstallFirstRun(
 711     const std::string& extension_id) {
 712   DCHECK(crx_file::id_util::IdIsValid(extension_id));
 713   UpdateExtensionPref(extension_id, kPrefExternalInstallFirstRun,
 714                       new base::FundamentalValue(true));
 715 }
 716
 717 bool ExtensionPrefs::HasWipeoutBeenAcknowledged(
 718     const std::string& extension_id) {
 719   return ReadPrefAsBooleanAndReturn(extension_id, kPrefWipeoutAcknowledged);
 720 }
 721
 722 void ExtensionPrefs::SetWipeoutAcknowledged(
 723     const std::string& extension_id,
 724     bool value) {
 725   UpdateExtensionPref(extension_id,
 726                       kPrefWipeoutAcknowledged,
 727                       value ? new base::FundamentalValue(value) : NULL);
 728 }
 729
 730 bool ExtensionPrefs::HasSettingsApiBubbleBeenAcknowledged(
 731     const std::string& extension_id) {
 732   return ReadPrefAsBooleanAndReturn(extension_id,
 733                                     kPrefSettingsBubbleAcknowledged);
 734 }
 735
 736 void ExtensionPrefs::SetSettingsApiBubbleBeenAcknowledged(
 737     const std::string& extension_id,
 738     bool value) {
 739   UpdateExtensionPref(extension_id,
 740                       kPrefSettingsBubbleAcknowledged,
 741                       value ? new base::FundamentalValue(value) : NULL);
 742 }
 743
 744 bool ExtensionPrefs::HasNtpOverriddenBubbleBeenAcknowledged(
 745     const std::string& extension_id) {
 746   return ReadPrefAsBooleanAndReturn(extension_id, kPrefNtpBubbleAcknowledged);
 747 }
 748
 749 void ExtensionPrefs::SetNtpOverriddenBubbleBeenAcknowledged(
 750     const std::string& extension_id,
 751     bool value) {
 752   UpdateExtensionPref(extension_id,
 753                       kPrefNtpBubbleAcknowledged,
 754                       value ? new base::FundamentalValue(value) : NULL);
 755 }
 756
 757 bool ExtensionPrefs::HasProxyOverriddenBubbleBeenAcknowledged(
 758     const std::string& extension_id) {
 759   return ReadPrefAsBooleanAndReturn(extension_id, kPrefProxyBubbleAcknowledged);
 760 }
 761
 762 void ExtensionPrefs::SetProxyOverriddenBubbleBeenAcknowledged(
 763     const std::string& extension_id,
 764     bool value) {
 765   UpdateExtensionPref(extension_id,
 766                       kPrefProxyBubbleAcknowledged,
 767                       value ? new base::FundamentalValue(value) : NULL);
 768 }
 769
 770 bool ExtensionPrefs::SetAlertSystemFirstRun() {
 771   if (prefs_->GetBoolean(pref_names::kAlertsInitialized)) {
 772     return true;
 773   }
 774   prefs_->SetBoolean(pref_names::kAlertsInitialized, true);
 775   return false;
 776 }
 777
 778 bool ExtensionPrefs::DidExtensionEscalatePermissions(
 779     const std::string& extension_id) {
 780   return ReadPrefAsBooleanAndReturn(extension_id,
 781                                     kExtensionDidEscalatePermissions);
 782 }
 783
 784 void ExtensionPrefs::SetDidExtensionEscalatePermissions(
 785     const Extension* extension, bool did_escalate) {
 786   UpdateExtensionPref(extension->id(), kExtensionDidEscalatePermissions,
 787                       new base::FundamentalValue(did_escalate));
 788 }
 789
 790 int ExtensionPrefs::GetDisableReasons(const std::string& extension_id) const {
 791   int value = -1;
 792   if (ReadPrefAsInteger(extension_id, kPrefDisableReasons, &value) &&
 793       value >= 0) {
 794     return value;
 795   }
 796   return Extension::DISABLE_NONE;
 797 }
 798
 799 bool ExtensionPrefs::HasDisableReason(
 800     const std::string& extension_id,
 801     Extension::DisableReason disable_reason) const {
 802   return (GetDisableReasons(extension_id) & disable_reason) != 0;
 803 }
 804
 805 void ExtensionPrefs::AddDisableReason(const std::string& extension_id,
 806                                       Extension::DisableReason disable_reason) {
 807   ModifyDisableReason(extension_id, disable_reason, DISABLE_REASON_ADD);
 808 }
 809
 810 void ExtensionPrefs::RemoveDisableReason(
 811     const std::string& extension_id,
 812     Extension::DisableReason disable_reason) {
 813   ModifyDisableReason(extension_id, disable_reason, DISABLE_REASON_REMOVE);
 814 }
 815
 816 void ExtensionPrefs::ClearDisableReasons(const std::string& extension_id) {
 817   ModifyDisableReason(
 818       extension_id, Extension::DISABLE_NONE, DISABLE_REASON_CLEAR);
 819 }
 820
 821 void ExtensionPrefs::ModifyDisableReason(const std::string& extension_id,
 822                                          Extension::DisableReason reason,
 823                                          DisableReasonChange change) {
 824   int old_value = GetDisableReasons(extension_id);
 825   int new_value = old_value;
 826   switch (change) {
 827     case DISABLE_REASON_ADD:
 828       new_value |= static_cast<int>(reason);
 829       break;
 830     case DISABLE_REASON_REMOVE:
 831       new_value &= ~static_cast<int>(reason);
 832       break;
 833     case DISABLE_REASON_CLEAR:
 834       new_value = Extension::DISABLE_NONE;
 835       break;
 836   }
 837
 838   if (old_value == new_value)  // no change, return.
 839     return;
 840
 841   if (new_value == Extension::DISABLE_NONE) {
 842     UpdateExtensionPref(extension_id, kPrefDisableReasons, NULL);
 843   } else {
 844     UpdateExtensionPref(extension_id,
 845                         kPrefDisableReasons,
 846                         new base::FundamentalValue(new_value));
 847   }
 848
 849   FOR_EACH_OBSERVER(ExtensionPrefsObserver,
 850                     observer_list_,
 851                     OnExtensionDisableReasonsChanged(extension_id, new_value));
 852 }
 853
 854 std::set<std::string> ExtensionPrefs::GetBlacklistedExtensions() {
 855   std::set<std::string> ids;
 856
 857   const base::DictionaryValue* extensions =
 858       prefs_->GetDictionary(pref_names::kExtensions);
 859   if (!extensions)
 860     return ids;
 861
 862   for (base::DictionaryValue::Iterator it(*extensions);
 863        !it.IsAtEnd(); it.Advance()) {
 864     if (!it.value().IsType(base::Value::TYPE_DICTIONARY)) {
 865       NOTREACHED() << "Invalid pref for extension " << it.key();
 866       continue;
 867     }
 868     if (IsBlacklistBitSet(
 869             static_cast<const base::DictionaryValue*>(&it.value()))) {
 870       ids.insert(it.key());
 871     }
 872   }
 873
 874   return ids;
 875 }
 876
 877 void ExtensionPrefs::SetExtensionBlacklisted(const std::string& extension_id,
 878                                              bool is_blacklisted) {
 879   bool currently_blacklisted = IsExtensionBlacklisted(extension_id);
 880   if (is_blacklisted == currently_blacklisted)
 881     return;
 882
 883   // Always make sure the "acknowledged" bit is cleared since the blacklist bit
 884   // is changing.
 885   UpdateExtensionPref(extension_id, kPrefBlacklistAcknowledged, NULL);
 886
 887   if (is_blacklisted) {
 888     UpdateExtensionPref(extension_id,
 889                         kPrefBlacklist,
 890                         new base::FundamentalValue(true));
 891   } else {
 892     UpdateExtensionPref(extension_id, kPrefBlacklist, NULL);
 893     const base::DictionaryValue* dict = GetExtensionPref(extension_id);
 894     if (dict && dict->empty())
 895       DeleteExtensionPrefs(extension_id);
 896   }
 897 }
 898
 899 bool ExtensionPrefs::IsExtensionBlacklisted(const std::string& id) const {
 900   const base::DictionaryValue* ext_prefs = GetExtensionPref(id);
 901   return ext_prefs && IsBlacklistBitSet(ext_prefs);
 902 }
 903
 904 namespace {
 905
 906 // Serializes a 64bit integer as a string value.
 907 void SaveInt64(base::DictionaryValue* dictionary,
 908                const char* key,
 909                const int64 value) {
 910   if (!dictionary)
 911     return;
 912
 913   std::string string_value = base::Int64ToString(value);
 914   dictionary->SetString(key, string_value);
 915 }
 916
 917 // Deserializes a 64bit integer stored as a string value.
 918 bool ReadInt64(const base::DictionaryValue* dictionary,
 919                const char* key,
 920                int64* value) {
 921   if (!dictionary)
 922     return false;
 923
 924   std::string string_value;
 925   if (!dictionary->GetString(key, &string_value))
 926     return false;
 927
 928   return base::StringToInt64(string_value, value);
 929 }
 930
 931 // Serializes |time| as a string value mapped to |key| in |dictionary|.
 932 void SaveTime(base::DictionaryValue* dictionary,
 933               const char* key,
 934               const base::Time& time) {
 935   SaveInt64(dictionary, key, time.ToInternalValue());
 936 }
 937
 938 // The opposite of SaveTime. If |key| is not found, this returns an empty Time
 939 // (is_null() will return true).
 940 base::Time ReadTime(const base::DictionaryValue* dictionary, const char* key) {
 941   int64 value;
 942   if (ReadInt64(dictionary, key, &value))
 943     return base::Time::FromInternalValue(value);
 944
 945   return base::Time();
 946 }
 947
 948 }  // namespace
 949
 950 base::Time ExtensionPrefs::LastPingDay(const std::string& extension_id) const {
 951   DCHECK(crx_file::id_util::IdIsValid(extension_id));
 952   return ReadTime(GetExtensionPref(extension_id), kLastPingDay);
 953 }
 954
 955 void ExtensionPrefs::SetLastPingDay(const std::string& extension_id,
 956                                     const base::Time& time) {
 957   DCHECK(crx_file::id_util::IdIsValid(extension_id));
 958   ScopedExtensionPrefUpdate update(prefs_, extension_id);
 959   SaveTime(update.Get(), kLastPingDay, time);
 960 }
 961
 962 base::Time ExtensionPrefs::BlacklistLastPingDay() const {
 963   return ReadTime(prefs_->GetDictionary(kExtensionsBlacklistUpdate),
 964                   kLastPingDay);
 965 }
 966
 967 void ExtensionPrefs::SetBlacklistLastPingDay(const base::Time& time) {
 968   DictionaryPrefUpdate update(prefs_, kExtensionsBlacklistUpdate);
 969   SaveTime(update.Get(), kLastPingDay, time);
 970 }
 971
 972 base::Time ExtensionPrefs::LastActivePingDay(const std::string& extension_id) {
 973   DCHECK(crx_file::id_util::IdIsValid(extension_id));
 974   return ReadTime(GetExtensionPref(extension_id), kLastActivePingDay);
 975 }
 976
 977 void ExtensionPrefs::SetLastActivePingDay(const std::string& extension_id,
 978                                           const base::Time& time) {
 979   DCHECK(crx_file::id_util::IdIsValid(extension_id));
 980   ScopedExtensionPrefUpdate update(prefs_, extension_id);
 981   SaveTime(update.Get(), kLastActivePingDay, time);
 982 }
 983
 984 bool ExtensionPrefs::GetActiveBit(const std::string& extension_id) {
 985   const base::DictionaryValue* dictionary = GetExtensionPref(extension_id);
 986   bool result = false;
 987   if (dictionary && dictionary->GetBoolean(kActiveBit, &result))
 988     return result;
 989   return false;
 990 }
 991
 992 void ExtensionPrefs::SetActiveBit(const std::string& extension_id,
 993                                   bool active) {
 994   UpdateExtensionPref(extension_id, kActiveBit,
 995                       new base::FundamentalValue(active));
 996 }
 997
 998 void ExtensionPrefs::MigratePermissions(const ExtensionIdList& extension_ids) {
 999   PermissionsInfo* info = PermissionsInfo::GetInstance();
1000   for (ExtensionIdList::const_iterator ext_id =
1001        extension_ids.begin(); ext_id != extension_ids.end(); ++ext_id) {
1002     // An extension's granted permissions need to be migrated if the
1003     // full_access bit is present. This bit was always present in the previous
1004     // scheme and is never present now.
1005     bool full_access = false;
1006     const base::DictionaryValue* ext = GetExtensionPref(*ext_id);
1007     if (!ext || !ext->GetBoolean(kPrefOldGrantedFullAccess, &full_access))
1008       continue;
1009
1010     // Remove the full access bit (empty list will get trimmed).
1011     UpdateExtensionPref(
1012         *ext_id, kPrefOldGrantedFullAccess, new base::ListValue());
1013
1014     // Add the plugin permission if the full access bit was set.
1015     if (full_access) {
1016       const base::ListValue* apis = NULL;
1017       base::ListValue* new_apis = NULL;
1018
1019       std::string granted_apis = JoinPrefs(kPrefGrantedPermissions, kPrefAPIs);
1020       if (ext->GetList(kPrefOldGrantedAPIs, &apis))
1021         new_apis = apis->DeepCopy();
1022       else
1023         new_apis = new base::ListValue();
1024
1025       std::string plugin_name = info->GetByID(APIPermission::kPlugin)->name();
1026       new_apis->Append(new base::StringValue(plugin_name));
1027       UpdateExtensionPref(*ext_id, granted_apis, new_apis);
1028     }
1029
1030     // The granted permissions originally only held the effective hosts,
1031     // which are a combination of host and user script host permissions.
1032     // We now maintain these lists separately. For migration purposes, it
1033     // does not matter how we treat the old effective hosts as long as the
1034     // new effective hosts will be the same, so we move them to explicit
1035     // host permissions.
1036     const base::ListValue* hosts = NULL;
1037     std::string explicit_hosts =
1038         JoinPrefs(kPrefGrantedPermissions, kPrefExplicitHosts);
1039     if (ext->GetList(kPrefOldGrantedHosts, &hosts)) {
1040       UpdateExtensionPref(
1041           *ext_id, explicit_hosts, hosts->DeepCopy());
1042
1043       // We can get rid of the old one by setting it to an empty list.
1044       UpdateExtensionPref(*ext_id, kPrefOldGrantedHosts, new base::ListValue());
1045     }
1046   }
1047 }
1048
1049 void ExtensionPrefs::MigrateDisableReasons(
1050     const ExtensionIdList& extension_ids) {
1051   for (ExtensionIdList::const_iterator ext_id =
1052        extension_ids.begin(); ext_id != extension_ids.end(); ++ext_id) {
1053     int value = -1;
1054     if (ReadPrefAsInteger(*ext_id, kDeprecatedPrefDisableReason, &value)) {
1055       int new_value = Extension::DISABLE_NONE;
1056       switch (value) {
1057         case Extension::DEPRECATED_DISABLE_USER_ACTION:
1058           new_value = Extension::DISABLE_USER_ACTION;
1059           break;
1060         case Extension::DEPRECATED_DISABLE_PERMISSIONS_INCREASE:
1061           new_value = Extension::DISABLE_PERMISSIONS_INCREASE;
1062           break;
1063         case Extension::DEPRECATED_DISABLE_RELOAD:
1064           new_value = Extension::DISABLE_RELOAD;
1065           break;
1066       }
1067
1068       UpdateExtensionPref(*ext_id, kPrefDisableReasons,
1069                           new base::FundamentalValue(new_value));
1070       // Remove the old disable reason.
1071       UpdateExtensionPref(*ext_id, kDeprecatedPrefDisableReason, NULL);
1072     }
1073   }
1074 }
1075
1076 PermissionSet* ExtensionPrefs::GetGrantedPermissions(
1077     const std::string& extension_id) {
1078   CHECK(crx_file::id_util::IdIsValid(extension_id));
1079   return ReadPrefAsPermissionSet(extension_id, kPrefGrantedPermissions);
1080 }
1081
1082 void ExtensionPrefs::AddGrantedPermissions(
1083     const std::string& extension_id,
1084     const PermissionSet* permissions) {
1085   CHECK(crx_file::id_util::IdIsValid(extension_id));
1086
1087   scoped_refptr<PermissionSet> granted_permissions(
1088       GetGrantedPermissions(extension_id));
1089
1090   // The new granted permissions are the union of the already granted
1091   // permissions and the newly granted permissions.
1092   scoped_refptr<PermissionSet> new_perms(
1093       PermissionSet::CreateUnion(
1094           permissions, granted_permissions.get()));
1095
1096   SetExtensionPrefPermissionSet(
1097       extension_id, kPrefGrantedPermissions, new_perms.get());
1098 }
1099
1100 void ExtensionPrefs::RemoveGrantedPermissions(
1101     const std::string& extension_id,
1102     const PermissionSet* permissions) {
1103   CHECK(crx_file::id_util::IdIsValid(extension_id));
1104
1105   scoped_refptr<PermissionSet> granted_permissions(
1106       GetGrantedPermissions(extension_id));
1107
1108   // The new granted permissions are the difference of the already granted
1109   // permissions and the newly ungranted permissions.
1110   scoped_refptr<PermissionSet> new_perms(
1111       PermissionSet::CreateDifference(
1112           granted_permissions.get(), permissions));
1113
1114   SetExtensionPrefPermissionSet(
1115       extension_id, kPrefGrantedPermissions, new_perms.get());
1116 }
1117
1118 PermissionSet* ExtensionPrefs::GetActivePermissions(
1119     const std::string& extension_id) {
1120   CHECK(crx_file::id_util::IdIsValid(extension_id));
1121   return ReadPrefAsPermissionSet(extension_id, kPrefActivePermissions);
1122 }
1123
1124 void ExtensionPrefs::SetActivePermissions(
1125     const std::string& extension_id,
1126     const PermissionSet* permissions) {
1127   SetExtensionPrefPermissionSet(
1128       extension_id, kPrefActivePermissions, permissions);
1129 }
1130
1131 void ExtensionPrefs::SetExtensionRunning(const std::string& extension_id,
1132     bool is_running) {
1133   base::Value* value = new base::FundamentalValue(is_running);
1134   UpdateExtensionPref(extension_id, kPrefRunning, value);
1135 }
1136
1137 bool ExtensionPrefs::IsExtensionRunning(const std::string& extension_id) {
1138   const base::DictionaryValue* extension = GetExtensionPref(extension_id);
1139   if (!extension)
1140     return false;
1141   bool running = false;
1142   extension->GetBoolean(kPrefRunning, &running);
1143   return running;
1144 }
1145
1146 void ExtensionPrefs::SetIsActive(const std::string& extension_id,
1147                                  bool is_active) {
1148   base::Value* value = new base::FundamentalValue(is_active);
1149   UpdateExtensionPref(extension_id, kIsActive, value);
1150 }
1151
1152 bool ExtensionPrefs::IsActive(const std::string& extension_id) {
1153   const base::DictionaryValue* extension = GetExtensionPref(extension_id);
1154   if (!extension)
1155     return false;
1156   bool is_active = false;
1157   extension->GetBoolean(kIsActive, &is_active);
1158   return is_active;
1159 }
1160
1161 bool ExtensionPrefs::IsIncognitoEnabled(const std::string& extension_id) const {
1162   return ReadPrefAsBooleanAndReturn(extension_id, kPrefIncognitoEnabled);
1163 }
1164
1165 void ExtensionPrefs::SetIsIncognitoEnabled(const std::string& extension_id,
1166                                            bool enabled) {
1167   UpdateExtensionPref(extension_id, kPrefIncognitoEnabled,
1168                       new base::FundamentalValue(enabled));
1169   extension_pref_value_map_->SetExtensionIncognitoState(extension_id, enabled);
1170 }
1171
1172 bool ExtensionPrefs::AllowFileAccess(const std::string& extension_id) const {
1173   return ReadPrefAsBooleanAndReturn(extension_id, kPrefAllowFileAccess);
1174 }
1175
1176 void ExtensionPrefs::SetAllowFileAccess(const std::string& extension_id,
1177                                         bool allow) {
1178   UpdateExtensionPref(extension_id, kPrefAllowFileAccess,
1179                       new base::FundamentalValue(allow));
1180 }
1181
1182 bool ExtensionPrefs::HasAllowFileAccessSetting(
1183     const std::string& extension_id) const {
1184   const base::DictionaryValue* ext = GetExtensionPref(extension_id);
1185   return ext && ext->HasKey(kPrefAllowFileAccess);
1186 }
1187
1188 bool ExtensionPrefs::DoesExtensionHaveState(
1189     const std::string& id, Extension::State check_state) const {
1190   const base::DictionaryValue* extension = GetExtensionPref(id);
1191   int state = -1;
1192   if (!extension || !extension->GetInteger(kPrefState, &state))
1193     return false;
1194
1195   if (state < 0 || state >= Extension::NUM_STATES) {
1196     LOG(ERROR) << "Bad pref 'state' for extension '" << id << "'";
1197     return false;
1198   }
1199
1200   return state == check_state;
1201 }
1202
1203 bool ExtensionPrefs::IsExternalExtensionUninstalled(
1204     const std::string& id) const {
1205   return DoesExtensionHaveState(id, Extension::EXTERNAL_EXTENSION_UNINSTALLED);
1206 }
1207
1208 bool ExtensionPrefs::IsExtensionDisabled(
1209     const std::string& id) const {
1210   return DoesExtensionHaveState(id, Extension::DISABLED);
1211 }
1212
1213 ExtensionIdList ExtensionPrefs::GetToolbarOrder() {
1214   ExtensionIdList id_list_out;
1215   GetUserExtensionPrefIntoContainer(pref_names::kToolbar, &id_list_out);
1216   return id_list_out;
1217 }
1218
1219 void ExtensionPrefs::SetToolbarOrder(const ExtensionIdList& extension_ids) {
1220   SetExtensionPrefFromContainer(pref_names::kToolbar, extension_ids);
1221 }
1222
1223 void ExtensionPrefs::OnExtensionInstalled(
1224     const Extension* extension,
1225     Extension::State initial_state,
1226     const syncer::StringOrdinal& page_ordinal,
1227     int install_flags,
1228     const std::string& install_parameter) {
1229   ScopedExtensionPrefUpdate update(prefs_, extension->id());
1230   base::DictionaryValue* extension_dict = update.Get();
1231   const base::Time install_time = time_provider_->GetCurrentTime();
1232   PopulateExtensionInfoPrefs(extension,
1233                              install_time,
1234                              initial_state,
1235                              install_flags,
1236                              install_parameter,
1237                              extension_dict);
1238
1239   bool requires_sort_ordinal = extension->RequiresSortOrdinal() &&
1240                                (install_flags & kInstallFlagIsEphemeral) == 0;
1241   FinishExtensionInfoPrefs(extension->id(),
1242                            install_time,
1243                            requires_sort_ordinal,
1244                            page_ordinal,
1245                            extension_dict);
1246 }
1247
1248 void ExtensionPrefs::OnExtensionUninstalled(const std::string& extension_id,
1249                                             const Manifest::Location& location,
1250                                             bool external_uninstall) {
1251   app_sorting_->ClearOrdinals(extension_id);
1252
1253   // For external extensions, we save a preference reminding ourself not to try
1254   // and install the extension anymore (except when |external_uninstall| is
1255   // true, which signifies that the registry key was deleted or the pref file
1256   // no longer lists the extension).
1257   if (!external_uninstall && Manifest::IsExternalLocation(location)) {
1258     UpdateExtensionPref(extension_id, kPrefState,
1259                         new base::FundamentalValue(
1260                             Extension::EXTERNAL_EXTENSION_UNINSTALLED));
1261     extension_pref_value_map_->SetExtensionState(extension_id, false);
1262     FOR_EACH_OBSERVER(ExtensionPrefsObserver,
1263                       observer_list_,
1264                       OnExtensionStateChanged(extension_id, false));
1265   } else {
1266     DeleteExtensionPrefs(extension_id);
1267   }
1268 }
1269
1270 void ExtensionPrefs::SetExtensionState(const std::string& extension_id,
1271                                        Extension::State state) {
1272   UpdateExtensionPref(extension_id, kPrefState,
1273                       new base::FundamentalValue(state));
1274   bool enabled = (state == Extension::ENABLED);
1275   extension_pref_value_map_->SetExtensionState(extension_id, enabled);
1276   FOR_EACH_OBSERVER(ExtensionPrefsObserver,
1277                     observer_list_,
1278                     OnExtensionStateChanged(extension_id, enabled));
1279 }
1280
1281 void ExtensionPrefs::SetExtensionBlacklistState(const std::string& extension_id,
1282                                                 BlacklistState state) {
1283   SetExtensionBlacklisted(extension_id, state == BLACKLISTED_MALWARE);
1284   UpdateExtensionPref(extension_id, kPrefBlacklistState,
1285                       new base::FundamentalValue(state));
1286 }
1287
1288 BlacklistState ExtensionPrefs::GetExtensionBlacklistState(
1289     const std::string& extension_id) {
1290   if (IsExtensionBlacklisted(extension_id))
1291     return BLACKLISTED_MALWARE;
1292   const base::DictionaryValue* ext_prefs = GetExtensionPref(extension_id);
1293   int int_value = 0;
1294   if (ext_prefs && ext_prefs->GetInteger(kPrefBlacklistState, &int_value))
1295     return static_cast<BlacklistState>(int_value);
1296
1297   return NOT_BLACKLISTED;
1298 }
1299
1300 std::string ExtensionPrefs::GetVersionString(const std::string& extension_id) {
1301   const base::DictionaryValue* extension = GetExtensionPref(extension_id);
1302   if (!extension)
1303     return std::string();
1304
1305   std::string version;
1306   extension->GetString(kPrefVersion, &version);
1307
1308   return version;
1309 }
1310
1311 void ExtensionPrefs::UpdateManifest(const Extension* extension) {
1312   if (!Manifest::IsUnpackedLocation(extension->location())) {
1313     const base::DictionaryValue* extension_dict =
1314         GetExtensionPref(extension->id());
1315     if (!extension_dict)
1316       return;
1317     const base::DictionaryValue* old_manifest = NULL;
1318     bool update_required =
1319         !extension_dict->GetDictionary(kPrefManifest, &old_manifest) ||
1320         !extension->manifest()->value()->Equals(old_manifest);
1321     if (update_required) {
1322       UpdateExtensionPref(extension->id(), kPrefManifest,
1323                           extension->manifest()->value()->DeepCopy());
1324     }
1325   }
1326 }
1327
1328 scoped_ptr<ExtensionInfo> ExtensionPrefs::GetInstalledInfoHelper(
1329     const std::string& extension_id,
1330     const base::DictionaryValue* extension) const {
1331   int location_value;
1332   if (!extension->GetInteger(kPrefLocation, &location_value))
1333     return scoped_ptr<ExtensionInfo>();
1334
1335   Manifest::Location location = static_cast<Manifest::Location>(location_value);
1336   if (location == Manifest::COMPONENT) {
1337     // Component extensions are ignored. Component extensions may have data
1338     // saved in preferences, but they are already loaded at this point (by
1339     // ComponentLoader) and shouldn't be populated into the result of
1340     // GetInstalledExtensionsInfo, otherwise InstalledLoader would also want to
1341     // load them.
1342     return scoped_ptr<ExtensionInfo>();
1343   }
1344
1345   // Only the following extension types have data saved in the preferences.
1346   if (location != Manifest::INTERNAL &&
1347       !Manifest::IsUnpackedLocation(location) &&
1348       !Manifest::IsExternalLocation(location)) {
1349     NOTREACHED();
1350     return scoped_ptr<ExtensionInfo>();
1351   }
1352
1353   const base::DictionaryValue* manifest = NULL;
1354   if (!Manifest::IsUnpackedLocation(location) &&
1355       !extension->GetDictionary(kPrefManifest, &manifest)) {
1356     LOG(WARNING) << "Missing manifest for extension " << extension_id;
1357     // Just a warning for now.
1358   }
1359
1360   base::FilePath::StringType path;
1361   if (!extension->GetString(kPrefPath, &path))
1362     return scoped_ptr<ExtensionInfo>();
1363
1364   // Make path absolute. Most (but not all) extension types have relative paths.
1365   if (!base::FilePath(path).IsAbsolute())
1366     path = install_directory_.Append(path).value();
1367
1368   return scoped_ptr<ExtensionInfo>(new ExtensionInfo(
1369       manifest, extension_id, base::FilePath(path), location));
1370 }
1371
1372 scoped_ptr<ExtensionInfo> ExtensionPrefs::GetInstalledExtensionInfo(
1373     const std::string& extension_id) const {
1374   const base::DictionaryValue* ext = NULL;
1375   const base::DictionaryValue* extensions =
1376       prefs_->GetDictionary(pref_names::kExtensions);
1377   if (!extensions ||
1378       !extensions->GetDictionaryWithoutPathExpansion(extension_id, &ext))
1379     return scoped_ptr<ExtensionInfo>();
1380   int state_value;
1381   if (ext->GetInteger(kPrefState, &state_value) &&
1382       state_value == Extension::EXTERNAL_EXTENSION_UNINSTALLED) {
1383     LOG(WARNING) << "External extension with id " << extension_id
1384                  << " has been uninstalled by the user";
1385     return scoped_ptr<ExtensionInfo>();
1386   }
1387
1388   return GetInstalledInfoHelper(extension_id, ext);
1389 }
1390
1391 scoped_ptr<ExtensionPrefs::ExtensionsInfo>
1392 ExtensionPrefs::GetInstalledExtensionsInfo() const {
1393   scoped_ptr<ExtensionsInfo> extensions_info(new ExtensionsInfo);
1394
1395   const base::DictionaryValue* extensions =
1396       prefs_->GetDictionary(pref_names::kExtensions);
1397   for (base::DictionaryValue::Iterator extension_id(*extensions);
1398        !extension_id.IsAtEnd(); extension_id.Advance()) {
1399     if (!crx_file::id_util::IdIsValid(extension_id.key()))
1400       continue;
1401
1402     scoped_ptr<ExtensionInfo> info =
1403         GetInstalledExtensionInfo(extension_id.key());
1404     if (info)
1405       extensions_info->push_back(linked_ptr<ExtensionInfo>(info.release()));
1406   }
1407
1408   return extensions_info.Pass();
1409 }
1410
1411 scoped_ptr<ExtensionPrefs::ExtensionsInfo>
1412 ExtensionPrefs::GetUninstalledExtensionsInfo() const {
1413   scoped_ptr<ExtensionsInfo> extensions_info(new ExtensionsInfo);
1414
1415   const base::DictionaryValue* extensions =
1416       prefs_->GetDictionary(pref_names::kExtensions);
1417   for (base::DictionaryValue::Iterator extension_id(*extensions);
1418        !extension_id.IsAtEnd(); extension_id.Advance()) {
1419     const base::DictionaryValue* ext = NULL;
1420     if (!crx_file::id_util::IdIsValid(extension_id.key()) ||
1421         !IsExternalExtensionUninstalled(extension_id.key()) ||
1422         !extension_id.value().GetAsDictionary(&ext))
1423       continue;
1424
1425     scoped_ptr<ExtensionInfo> info =
1426         GetInstalledInfoHelper(extension_id.key(), ext);
1427     if (info)
1428       extensions_info->push_back(linked_ptr<ExtensionInfo>(info.release()));
1429   }
1430
1431   return extensions_info.Pass();
1432 }
1433
1434 void ExtensionPrefs::SetDelayedInstallInfo(
1435     const Extension* extension,
1436     Extension::State initial_state,
1437     int install_flags,
1438     DelayReason delay_reason,
1439     const syncer::StringOrdinal& page_ordinal,
1440     const std::string& install_parameter) {
1441   base::DictionaryValue* extension_dict = new base::DictionaryValue();
1442   PopulateExtensionInfoPrefs(extension,
1443                              time_provider_->GetCurrentTime(),
1444                              initial_state,
1445                              install_flags,
1446                              install_parameter,
1447                              extension_dict);
1448
1449   // Add transient data that is needed by FinishDelayedInstallInfo(), but
1450   // should not be in the final extension prefs. All entries here should have
1451   // a corresponding Remove() call in FinishDelayedInstallInfo().
1452   if (extension->RequiresSortOrdinal() &&
1453       (install_flags & kInstallFlagIsEphemeral) == 0) {
1454     extension_dict->SetString(
1455         kPrefSuggestedPageOrdinal,
1456         page_ordinal.IsValid() ? page_ordinal.ToInternalValue()
1457                                : std::string());
1458   }
1459   extension_dict->SetInteger(kDelayedInstallReason,
1460                              static_cast<int>(delay_reason));
1461
1462   UpdateExtensionPref(extension->id(), kDelayedInstallInfo, extension_dict);
1463 }
1464
1465 bool ExtensionPrefs::RemoveDelayedInstallInfo(
1466     const std::string& extension_id) {
1467   if (!GetExtensionPref(extension_id))
1468     return false;
1469   ScopedExtensionPrefUpdate update(prefs_, extension_id);
1470   bool result = update->Remove(kDelayedInstallInfo, NULL);
1471   return result;
1472 }
1473
1474 bool ExtensionPrefs::FinishDelayedInstallInfo(
1475     const std::string& extension_id) {
1476   CHECK(crx_file::id_util::IdIsValid(extension_id));
1477   ScopedExtensionPrefUpdate update(prefs_, extension_id);
1478   base::DictionaryValue* extension_dict = update.Get();
1479   base::DictionaryValue* pending_install_dict = NULL;
1480   if (!extension_dict->GetDictionary(kDelayedInstallInfo,
1481                                      &pending_install_dict)) {
1482     return false;
1483   }
1484
1485   // Retrieve and clear transient values populated by SetDelayedInstallInfo().
1486   // Also do any other data cleanup that makes sense.
1487   std::string serialized_ordinal;
1488   syncer::StringOrdinal suggested_page_ordinal;
1489   bool needs_sort_ordinal = false;
1490   if (pending_install_dict->GetString(kPrefSuggestedPageOrdinal,
1491                                       &serialized_ordinal)) {
1492     suggested_page_ordinal = syncer::StringOrdinal(serialized_ordinal);
1493     needs_sort_ordinal = true;
1494     pending_install_dict->Remove(kPrefSuggestedPageOrdinal, NULL);
1495   }
1496   pending_install_dict->Remove(kDelayedInstallReason, NULL);
1497
1498   const base::Time install_time = time_provider_->GetCurrentTime();
1499   pending_install_dict->Set(
1500       kPrefInstallTime,
1501       new base::StringValue(
1502           base::Int64ToString(install_time.ToInternalValue())));
1503
1504   // Some extension pref values are written conditionally. If they are not
1505   // present in the delayed install data, they should be removed when the
1506   // delayed install is committed.
1507   extension_dict->Remove(kPrefEphemeralApp, NULL);
1508
1509   // Commit the delayed install data.
1510   for (base::DictionaryValue::Iterator it(*pending_install_dict); !it.IsAtEnd();
1511        it.Advance()) {
1512     extension_dict->Set(it.key(), it.value().DeepCopy());
1513   }
1514   FinishExtensionInfoPrefs(extension_id, install_time, needs_sort_ordinal,
1515                            suggested_page_ordinal, extension_dict);
1516   return true;
1517 }
1518
1519 scoped_ptr<ExtensionInfo> ExtensionPrefs::GetDelayedInstallInfo(
1520     const std::string& extension_id) const {
1521   const base::DictionaryValue* extension_prefs =
1522       GetExtensionPref(extension_id);
1523   if (!extension_prefs)
1524     return scoped_ptr<ExtensionInfo>();
1525
1526   const base::DictionaryValue* ext = NULL;
1527   if (!extension_prefs->GetDictionary(kDelayedInstallInfo, &ext))
1528     return scoped_ptr<ExtensionInfo>();
1529
1530   return GetInstalledInfoHelper(extension_id, ext);
1531 }
1532
1533 ExtensionPrefs::DelayReason ExtensionPrefs::GetDelayedInstallReason(
1534     const std::string& extension_id) const {
1535   const base::DictionaryValue* extension_prefs =
1536       GetExtensionPref(extension_id);
1537   if (!extension_prefs)
1538     return DELAY_REASON_NONE;
1539
1540   const base::DictionaryValue* ext = NULL;
1541   if (!extension_prefs->GetDictionary(kDelayedInstallInfo, &ext))
1542     return DELAY_REASON_NONE;
1543
1544   int delay_reason;
1545   if (!ext->GetInteger(kDelayedInstallReason, &delay_reason))
1546     return DELAY_REASON_NONE;
1547
1548   return static_cast<DelayReason>(delay_reason);
1549 }
1550
1551 scoped_ptr<ExtensionPrefs::ExtensionsInfo> ExtensionPrefs::
1552     GetAllDelayedInstallInfo() const {
1553   scoped_ptr<ExtensionsInfo> extensions_info(new ExtensionsInfo);
1554
1555   const base::DictionaryValue* extensions =
1556       prefs_->GetDictionary(pref_names::kExtensions);
1557   for (base::DictionaryValue::Iterator extension_id(*extensions);
1558        !extension_id.IsAtEnd(); extension_id.Advance()) {
1559     if (!crx_file::id_util::IdIsValid(extension_id.key()))
1560       continue;
1561
1562     scoped_ptr<ExtensionInfo> info = GetDelayedInstallInfo(extension_id.key());
1563     if (info)
1564       extensions_info->push_back(linked_ptr<ExtensionInfo>(info.release()));
1565   }
1566
1567   return extensions_info.Pass();
1568 }
1569
1570 bool ExtensionPrefs::IsEphemeralApp(const std::string& extension_id) const {
1571   if (ReadPrefAsBooleanAndReturn(extension_id, kPrefEphemeralApp))
1572     return true;
1573
1574   // Ephemerality was previously stored in the creation flags, so we must also
1575   // check it for backcompatibility.
1576   return (GetCreationFlags(extension_id) & Extension::IS_EPHEMERAL) != 0;
1577 }
1578
1579 void ExtensionPrefs::OnEphemeralAppPromoted(const std::string& extension_id) {
1580   DCHECK(IsEphemeralApp(extension_id));
1581
1582   UpdateExtensionPref(extension_id, kPrefEphemeralApp, NULL);
1583
1584   // Ephemerality was previously stored in the creation flags, so ensure the bit
1585   // is cleared.
1586   int creation_flags = Extension::NO_FLAGS;
1587   if (ReadPrefAsInteger(extension_id, kPrefCreationFlags, &creation_flags)) {
1588     if (creation_flags & Extension::IS_EPHEMERAL) {
1589       creation_flags &= ~static_cast<int>(Extension::IS_EPHEMERAL);
1590       UpdateExtensionPref(extension_id,
1591                           kPrefCreationFlags,
1592                           new base::FundamentalValue(creation_flags));
1593     }
1594   }
1595 }
1596
1597 bool ExtensionPrefs::WasAppDraggedByUser(const std::string& extension_id) {
1598   return ReadPrefAsBooleanAndReturn(extension_id, kPrefUserDraggedApp);
1599 }
1600
1601 void ExtensionPrefs::SetAppDraggedByUser(const std::string& extension_id) {
1602   UpdateExtensionPref(extension_id, kPrefUserDraggedApp,
1603                       new base::FundamentalValue(true));
1604 }
1605
1606 bool ExtensionPrefs::IsFromWebStore(
1607     const std::string& extension_id) const {
1608   const base::DictionaryValue* dictionary = GetExtensionPref(extension_id);
1609   bool result = false;
1610   if (dictionary && dictionary->GetBoolean(kPrefFromWebStore, &result))
1611     return result;
1612   return false;
1613 }
1614
1615 bool ExtensionPrefs::IsFromBookmark(
1616     const std::string& extension_id) const {
1617   const base::DictionaryValue* dictionary = GetExtensionPref(extension_id);
1618   bool result = false;
1619   if (dictionary && dictionary->GetBoolean(kPrefFromBookmark, &result))
1620     return result;
1621   return false;
1622 }
1623
1624 int ExtensionPrefs::GetCreationFlags(const std::string& extension_id) const {
1625   int creation_flags = Extension::NO_FLAGS;
1626   if (!ReadPrefAsInteger(extension_id, kPrefCreationFlags, &creation_flags)) {
1627     // Since kPrefCreationFlags was added later, it will be missing for
1628     // previously installed extensions.
1629     if (IsFromBookmark(extension_id))
1630       creation_flags |= Extension::FROM_BOOKMARK;
1631     if (IsFromWebStore(extension_id))
1632       creation_flags |= Extension::FROM_WEBSTORE;
1633     if (WasInstalledByDefault(extension_id))
1634       creation_flags |= Extension::WAS_INSTALLED_BY_DEFAULT;
1635     if (WasInstalledByOem(extension_id))
1636       creation_flags |= Extension::WAS_INSTALLED_BY_OEM;
1637   }
1638   return creation_flags;
1639 }
1640
1641 int ExtensionPrefs::GetDelayedInstallCreationFlags(
1642     const std::string& extension_id) const {
1643   int creation_flags = Extension::NO_FLAGS;
1644   const base::DictionaryValue* delayed_info = NULL;
1645   if (ReadPrefAsDictionary(extension_id, kDelayedInstallInfo, &delayed_info)) {
1646     delayed_info->GetInteger(kPrefCreationFlags, &creation_flags);
1647   }
1648   return creation_flags;
1649 }
1650
1651 bool ExtensionPrefs::WasInstalledByDefault(
1652     const std::string& extension_id) const {
1653   const base::DictionaryValue* dictionary = GetExtensionPref(extension_id);
1654   bool result = false;
1655   if (dictionary &&
1656       dictionary->GetBoolean(kPrefWasInstalledByDefault, &result))
1657     return result;
1658   return false;
1659 }
1660
1661 bool ExtensionPrefs::WasInstalledByOem(const std::string& extension_id) const {
1662   const base::DictionaryValue* dictionary = GetExtensionPref(extension_id);
1663   bool result = false;
1664   if (dictionary && dictionary->GetBoolean(kPrefWasInstalledByOem, &result))
1665     return result;
1666   return false;
1667 }
1668
1669 base::Time ExtensionPrefs::GetInstallTime(
1670     const std::string& extension_id) const {
1671   const base::DictionaryValue* extension = GetExtensionPref(extension_id);
1672   if (!extension) {
1673     NOTREACHED();
1674     return base::Time();
1675   }
1676   std::string install_time_str;
1677   if (!extension->GetString(kPrefInstallTime, &install_time_str))
1678     return base::Time();
1679   int64 install_time_i64 = 0;
1680   if (!base::StringToInt64(install_time_str, &install_time_i64))
1681     return base::Time();
1682   return base::Time::FromInternalValue(install_time_i64);
1683 }
1684
1685 bool ExtensionPrefs::DoNotSync(const std::string& extension_id) const {
1686   bool do_not_sync;
1687   if (!ReadPrefAsBoolean(extension_id, kPrefDoNotSync, &do_not_sync))
1688     return false;
1689
1690   return do_not_sync;
1691 }
1692
1693 base::Time ExtensionPrefs::GetLastLaunchTime(
1694     const std::string& extension_id) const {
1695   const base::DictionaryValue* extension = GetExtensionPref(extension_id);
1696   if (!extension)
1697     return base::Time();
1698
1699   std::string launch_time_str;
1700   if (!extension->GetString(kPrefLastLaunchTime, &launch_time_str))
1701     return base::Time();
1702   int64 launch_time_i64 = 0;
1703   if (!base::StringToInt64(launch_time_str, &launch_time_i64))
1704     return base::Time();
1705   return base::Time::FromInternalValue(launch_time_i64);
1706 }
1707
1708 void ExtensionPrefs::SetLastLaunchTime(const std::string& extension_id,
1709                                        const base::Time& time) {
1710   DCHECK(crx_file::id_util::IdIsValid(extension_id));
1711   ScopedExtensionPrefUpdate update(prefs_, extension_id);
1712   SaveTime(update.Get(), kPrefLastLaunchTime, time);
1713 }
1714
1715 void ExtensionPrefs::GetExtensions(ExtensionIdList* out) {
1716   CHECK(out);
1717
1718   scoped_ptr<ExtensionsInfo> extensions_info(GetInstalledExtensionsInfo());
1719
1720   for (size_t i = 0; i < extensions_info->size(); ++i) {
1721     ExtensionInfo* info = extensions_info->at(i).get();
1722     out->push_back(info->extension_id);
1723   }
1724 }
1725
1726 // static
1727 ExtensionIdList ExtensionPrefs::GetExtensionsFrom(
1728     const PrefService* pref_service) {
1729   ExtensionIdList result;
1730
1731   const base::DictionaryValue* extension_prefs = NULL;
1732   const base::Value* extension_prefs_value =
1733       pref_service->GetUserPrefValue(pref_names::kExtensions);
1734   if (!extension_prefs_value ||
1735       !extension_prefs_value->GetAsDictionary(&extension_prefs)) {
1736     return result;  // Empty set
1737   }
1738
1739   for (base::DictionaryValue::Iterator it(*extension_prefs); !it.IsAtEnd();
1740        it.Advance()) {
1741     const base::DictionaryValue* ext = NULL;
1742     if (!it.value().GetAsDictionary(&ext)) {
1743       NOTREACHED() << "Invalid pref for extension " << it.key();
1744       continue;
1745     }
1746     if (!IsBlacklistBitSet(ext))
1747       result.push_back(it.key());
1748   }
1749   return result;
1750 }
1751
1752 void ExtensionPrefs::AddObserver(ExtensionPrefsObserver* observer) {
1753   observer_list_.AddObserver(observer);
1754 }
1755
1756 void ExtensionPrefs::RemoveObserver(ExtensionPrefsObserver* observer) {
1757   observer_list_.RemoveObserver(observer);
1758 }
1759
1760 void ExtensionPrefs::FixMissingPrefs(const ExtensionIdList& extension_ids) {
1761   // Fix old entries that did not get an installation time entry when they
1762   // were installed or don't have a preferences field.
1763   for (ExtensionIdList::const_iterator ext_id = extension_ids.begin();
1764        ext_id != extension_ids.end(); ++ext_id) {
1765     if (GetInstallTime(*ext_id) == base::Time()) {
1766       VLOG(1) << "Could not parse installation time of extension "
1767               << *ext_id << ". It was probably installed before setting "
1768               << kPrefInstallTime << " was introduced. Updating "
1769               << kPrefInstallTime << " to the current time.";
1770       const base::Time install_time = time_provider_->GetCurrentTime();
1771       UpdateExtensionPref(*ext_id,
1772                           kPrefInstallTime,
1773                           new base::StringValue(base::Int64ToString(
1774                               install_time.ToInternalValue())));
1775     }
1776   }
1777 }
1778
1779 void ExtensionPrefs::InitPrefStore() {
1780   if (extensions_disabled_) {
1781     extension_pref_value_map_->NotifyInitializationCompleted();
1782     return;
1783   }
1784
1785   // When this is called, the PrefService is initialized and provides access
1786   // to the user preferences stored in a JSON file.
1787   ExtensionIdList extension_ids;
1788   GetExtensions(&extension_ids);
1789   // Create empty preferences dictionary for each extension (these dictionaries
1790   // are pruned when persisting the preferences to disk).
1791   for (ExtensionIdList::iterator ext_id = extension_ids.begin();
1792        ext_id != extension_ids.end(); ++ext_id) {
1793     ScopedExtensionPrefUpdate update(prefs_, *ext_id);
1794     // This creates an empty dictionary if none is stored.
1795     update.Get();
1796   }
1797
1798   FixMissingPrefs(extension_ids);
1799   MigratePermissions(extension_ids);
1800   MigrateDisableReasons(extension_ids);
1801   app_sorting_->Initialize(extension_ids);
1802
1803   InitExtensionControlledPrefs(extension_pref_value_map_);
1804
1805   extension_pref_value_map_->NotifyInitializationCompleted();
1806 }
1807
1808 bool ExtensionPrefs::HasIncognitoPrefValue(const std::string& pref_key) {
1809   bool has_incognito_pref_value = false;
1810   extension_pref_value_map_->GetEffectivePrefValue(pref_key,
1811                                                    true,
1812                                                    &has_incognito_pref_value);
1813   return has_incognito_pref_value;
1814 }
1815
1816 URLPatternSet ExtensionPrefs::GetAllowedInstallSites() {
1817   URLPatternSet result;
1818   const base::ListValue* list =
1819       prefs_->GetList(pref_names::kAllowedInstallSites);
1820   CHECK(list);
1821
1822   for (size_t i = 0; i < list->GetSize(); ++i) {
1823     std::string entry_string;
1824     URLPattern entry(URLPattern::SCHEME_ALL);
1825     if (!list->GetString(i, &entry_string) ||
1826         entry.Parse(entry_string) != URLPattern::PARSE_SUCCESS) {
1827       LOG(ERROR) << "Invalid value for preference: "
1828                  << pref_names::kAllowedInstallSites << "." << i;
1829       continue;
1830     }
1831     result.AddPattern(entry);
1832   }
1833
1834   return result;
1835 }
1836
1837 const base::DictionaryValue* ExtensionPrefs::GetGeometryCache(
1838     const std::string& extension_id) const {
1839   const base::DictionaryValue* extension_prefs = GetExtensionPref(extension_id);
1840   if (!extension_prefs)
1841     return NULL;
1842
1843   const base::DictionaryValue* ext = NULL;
1844   if (!extension_prefs->GetDictionary(kPrefGeometryCache, &ext))
1845     return NULL;
1846
1847   return ext;
1848 }
1849
1850 void ExtensionPrefs::SetGeometryCache(
1851     const std::string& extension_id,
1852     scoped_ptr<base::DictionaryValue> cache) {
1853   UpdateExtensionPref(extension_id, kPrefGeometryCache, cache.release());
1854 }
1855
1856 const base::DictionaryValue* ExtensionPrefs::GetInstallSignature() {
1857   return prefs_->GetDictionary(kInstallSignature);
1858 }
1859
1860 void ExtensionPrefs::SetInstallSignature(
1861     const base::DictionaryValue* signature) {
1862   if (signature) {
1863     prefs_->Set(kInstallSignature, *signature);
1864     DVLOG(1) << "SetInstallSignature - saving";
1865   } else {
1866     DVLOG(1) << "SetInstallSignature - clearing";
1867     prefs_->ClearPref(kInstallSignature);
1868   }
1869 }
1870
1871 std::string ExtensionPrefs::GetInstallParam(
1872     const std::string& extension_id) const {
1873   const base::DictionaryValue* extension = GetExtensionPref(extension_id);
1874   if (!extension)  // Expected during unit testing.
1875     return std::string();
1876   std::string install_parameter;
1877   if (!extension->GetString(kPrefInstallParam, &install_parameter))
1878     return std::string();
1879   return install_parameter;
1880 }
1881
1882 void ExtensionPrefs::SetInstallParam(const std::string& extension_id,
1883                                      const std::string& install_parameter) {
1884   UpdateExtensionPref(extension_id,
1885                       kPrefInstallParam,
1886                       new base::StringValue(install_parameter));
1887 }
1888
1889 int ExtensionPrefs::GetCorruptedDisableCount() {
1890   return prefs_->GetInteger(kCorruptedDisableCount);
1891 }
1892
1893 void ExtensionPrefs::IncrementCorruptedDisableCount() {
1894   int count = prefs_->GetInteger(kCorruptedDisableCount);
1895   prefs_->SetInteger(kCorruptedDisableCount, count + 1);
1896 }
1897
1898 ExtensionPrefs::ExtensionPrefs(
1899     PrefService* prefs,
1900     const base::FilePath& root_dir,
1901     ExtensionPrefValueMap* extension_pref_value_map,
1902     scoped_ptr<AppSorting> app_sorting,
1903     scoped_ptr<TimeProvider> time_provider,
1904     bool extensions_disabled,
1905     const std::vector<ExtensionPrefsObserver*>& early_observers)
1906     : prefs_(prefs),
1907       install_directory_(root_dir),
1908       extension_pref_value_map_(extension_pref_value_map),
1909       app_sorting_(app_sorting.Pass()),
1910       time_provider_(time_provider.Pass()),
1911       extensions_disabled_(extensions_disabled) {
1912   app_sorting_->SetExtensionScopedPrefs(this);
1913   MakePathsRelative();
1914
1915   // Ensure that any early observers are watching before prefs are initialized.
1916   for (std::vector<ExtensionPrefsObserver*>::const_iterator iter =
1917            early_observers.begin();
1918        iter != early_observers.end();
1919        ++iter) {
1920     AddObserver(*iter);
1921   }
1922
1923   InitPrefStore();
1924 }
1925
1926 void ExtensionPrefs::SetNeedsStorageGarbageCollection(bool value) {
1927   prefs_->SetBoolean(pref_names::kStorageGarbageCollect, value);
1928 }
1929
1930 bool ExtensionPrefs::NeedsStorageGarbageCollection() {
1931   return prefs_->GetBoolean(pref_names::kStorageGarbageCollect);
1932 }
1933
1934 // static
1935 void ExtensionPrefs::RegisterProfilePrefs(
1936     user_prefs::PrefRegistrySyncable* registry) {
1937   registry->RegisterDictionaryPref(
1938       pref_names::kExtensions,
1939       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1940   registry->RegisterListPref(pref_names::kToolbar,
1941                              user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
1942   registry->RegisterIntegerPref(
1943       pref_names::kToolbarSize,
1944       -1,  // default value
1945       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1946   registry->RegisterDictionaryPref(
1947       kExtensionsBlacklistUpdate,
1948       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1949   registry->RegisterListPref(pref_names::kInstallAllowList,
1950                              user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1951   registry->RegisterListPref(pref_names::kInstallDenyList,
1952                              user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1953   registry->RegisterDictionaryPref(
1954       pref_names::kInstallForceList,
1955       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1956   registry->RegisterListPref(pref_names::kAllowedTypes,
1957                              user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1958   registry->RegisterBooleanPref(
1959       pref_names::kStorageGarbageCollect,
1960       false,  // default value
1961       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1962   registry->RegisterInt64Pref(
1963       pref_names::kLastUpdateCheck,
1964       0,  // default value
1965       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1966   registry->RegisterInt64Pref(
1967       pref_names::kNextUpdateCheck,
1968       0,  // default value
1969       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1970   registry->RegisterListPref(pref_names::kAllowedInstallSites,
1971                              user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1972   registry->RegisterStringPref(
1973       pref_names::kLastChromeVersion,
1974       std::string(),  // default value
1975       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1976   registry->RegisterDictionaryPref(
1977       kInstallSignature,
1978       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1979
1980   registry->RegisterListPref(pref_names::kNativeMessagingBlacklist,
1981                              user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1982   registry->RegisterListPref(pref_names::kNativeMessagingWhitelist,
1983                              user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1984   registry->RegisterBooleanPref(
1985       pref_names::kNativeMessagingUserLevelHosts,
1986       true,  // default value
1987       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1988   registry->RegisterIntegerPref(
1989       kCorruptedDisableCount,
1990       0,  // default value
1991       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1992
1993 #if !defined(OS_MACOSX)
1994   registry->RegisterBooleanPref(
1995       pref_names::kAppFullscreenAllowed, true,
1996       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1997 #endif
1998 }
1999
2000 template <class ExtensionIdContainer>
2001 bool ExtensionPrefs::GetUserExtensionPrefIntoContainer(
2002     const char* pref,
2003     ExtensionIdContainer* id_container_out) {
2004   DCHECK(id_container_out->empty());
2005
2006   const base::Value* user_pref_value = prefs_->GetUserPrefValue(pref);
2007   const base::ListValue* user_pref_as_list;
2008   if (!user_pref_value || !user_pref_value->GetAsList(&user_pref_as_list))
2009     return false;
2010
2011   std::insert_iterator<ExtensionIdContainer> insert_iterator(
2012       *id_container_out, id_container_out->end());
2013   std::string extension_id;
2014   for (base::ListValue::const_iterator value_it = user_pref_as_list->begin();
2015        value_it != user_pref_as_list->end(); ++value_it) {
2016     if (!(*value_it)->GetAsString(&extension_id)) {
2017       NOTREACHED();
2018       continue;
2019     }
2020     insert_iterator = extension_id;
2021   }
2022   return true;
2023 }
2024
2025 template <class ExtensionIdContainer>
2026 void ExtensionPrefs::SetExtensionPrefFromContainer(
2027     const char* pref,
2028     const ExtensionIdContainer& strings) {
2029   ListPrefUpdate update(prefs_, pref);
2030   base::ListValue* list_of_values = update.Get();
2031   list_of_values->Clear();
2032   for (typename ExtensionIdContainer::const_iterator iter = strings.begin();
2033        iter != strings.end(); ++iter) {
2034     list_of_values->Append(new base::StringValue(*iter));
2035   }
2036 }
2037
2038 void ExtensionPrefs::PopulateExtensionInfoPrefs(
2039     const Extension* extension,
2040     const base::Time install_time,
2041     Extension::State initial_state,
2042     int install_flags,
2043     const std::string& install_parameter,
2044     base::DictionaryValue* extension_dict) {
2045   extension_dict->Set(kPrefState, new base::FundamentalValue(initial_state));
2046   extension_dict->Set(kPrefLocation,
2047                       new base::FundamentalValue(extension->location()));
2048   extension_dict->Set(kPrefCreationFlags,
2049                       new base::FundamentalValue(extension->creation_flags()));
2050   extension_dict->Set(kPrefFromWebStore,
2051                       new base::FundamentalValue(extension->from_webstore()));
2052   extension_dict->Set(kPrefFromBookmark,
2053                       new base::FundamentalValue(extension->from_bookmark()));
2054   extension_dict->Set(
2055       kPrefWasInstalledByDefault,
2056       new base::FundamentalValue(extension->was_installed_by_default()));
2057   extension_dict->Set(
2058       kPrefWasInstalledByOem,
2059       new base::FundamentalValue(extension->was_installed_by_oem()));
2060   extension_dict->Set(kPrefInstallTime,
2061                       new base::StringValue(
2062                           base::Int64ToString(install_time.ToInternalValue())));
2063   if (install_flags & kInstallFlagIsBlacklistedForMalware)
2064     extension_dict->Set(kPrefBlacklist, new base::FundamentalValue(true));
2065
2066   if (install_flags & kInstallFlagIsEphemeral)
2067     extension_dict->Set(kPrefEphemeralApp, new base::FundamentalValue(true));
2068   else
2069     extension_dict->Remove(kPrefEphemeralApp, NULL);
2070
2071   base::FilePath::StringType path = MakePathRelative(install_directory_,
2072                                                      extension->path());
2073   extension_dict->Set(kPrefPath, new base::StringValue(path));
2074   if (!install_parameter.empty()) {
2075     extension_dict->Set(kPrefInstallParam,
2076                         new base::StringValue(install_parameter));
2077   }
2078   // We store prefs about LOAD extensions, but don't cache their manifest
2079   // since it may change on disk.
2080   if (!Manifest::IsUnpackedLocation(extension->location())) {
2081     extension_dict->Set(kPrefManifest,
2082                         extension->manifest()->value()->DeepCopy());
2083   }
2084
2085   // Only writes kPrefDoNotSync when it is not the default.
2086   if (install_flags & kInstallFlagDoNotSync)
2087     extension_dict->Set(kPrefDoNotSync, new base::FundamentalValue(true));
2088   else
2089     extension_dict->Remove(kPrefDoNotSync, NULL);
2090 }
2091
2092 void ExtensionPrefs::InitExtensionControlledPrefs(
2093     ExtensionPrefValueMap* value_map) {
2094   ExtensionIdList extension_ids;
2095   GetExtensions(&extension_ids);
2096
2097   for (ExtensionIdList::iterator extension_id = extension_ids.begin();
2098        extension_id != extension_ids.end();
2099        ++extension_id) {
2100     base::Time install_time = GetInstallTime(*extension_id);
2101     bool is_enabled = !IsExtensionDisabled(*extension_id);
2102     bool is_incognito_enabled = IsIncognitoEnabled(*extension_id);
2103     value_map->RegisterExtension(
2104         *extension_id, install_time, is_enabled, is_incognito_enabled);
2105
2106     FOR_EACH_OBSERVER(
2107         ExtensionPrefsObserver,
2108         observer_list_,
2109         OnExtensionRegistered(*extension_id, install_time, is_enabled));
2110
2111     // Set regular extension controlled prefs.
2112     LoadExtensionControlledPrefs(
2113         this, value_map, *extension_id, kExtensionPrefsScopeRegular);
2114     // Set incognito extension controlled prefs.
2115     LoadExtensionControlledPrefs(this,
2116                                  value_map,
2117                                  *extension_id,
2118                                  kExtensionPrefsScopeIncognitoPersistent);
2119     // Set regular-only extension controlled prefs.
2120     LoadExtensionControlledPrefs(
2121         this, value_map, *extension_id, kExtensionPrefsScopeRegularOnly);
2122
2123     FOR_EACH_OBSERVER(ExtensionPrefsObserver,
2124                       observer_list_,
2125                       OnExtensionPrefsLoaded(*extension_id, this));
2126   }
2127 }
2128
2129 void ExtensionPrefs::FinishExtensionInfoPrefs(
2130     const std::string& extension_id,
2131     const base::Time install_time,
2132     bool needs_sort_ordinal,
2133     const syncer::StringOrdinal& suggested_page_ordinal,
2134     base::DictionaryValue* extension_dict) {
2135   // Reinitializes various preferences with empty dictionaries.
2136   if (!extension_dict->HasKey(pref_names::kPrefPreferences)) {
2137     extension_dict->Set(pref_names::kPrefPreferences,
2138                         new base::DictionaryValue);
2139   }
2140
2141   if (!extension_dict->HasKey(pref_names::kPrefIncognitoPreferences)) {
2142     extension_dict->Set(pref_names::kPrefIncognitoPreferences,
2143                         new base::DictionaryValue);
2144   }
2145
2146   if (!extension_dict->HasKey(pref_names::kPrefRegularOnlyPreferences)) {
2147     extension_dict->Set(pref_names::kPrefRegularOnlyPreferences,
2148                         new base::DictionaryValue);
2149   }
2150
2151   if (!extension_dict->HasKey(pref_names::kPrefContentSettings))
2152     extension_dict->Set(pref_names::kPrefContentSettings, new base::ListValue);
2153
2154   if (!extension_dict->HasKey(pref_names::kPrefIncognitoContentSettings)) {
2155     extension_dict->Set(pref_names::kPrefIncognitoContentSettings,
2156                         new base::ListValue);
2157   }
2158
2159   // If this point has been reached, any pending installs should be considered
2160   // out of date.
2161   extension_dict->Remove(kDelayedInstallInfo, NULL);
2162
2163   // Clear state that may be registered from a previous install.
2164   extension_dict->Remove(EventRouter::kRegisteredEvents, NULL);
2165
2166   // FYI, all code below here races on sudden shutdown because |extension_dict|,
2167   // |app_sorting_|, |extension_pref_value_map_|, and (potentially) observers
2168   // are updated non-transactionally. This is probably not fixable without
2169   // nested transactional updates to pref dictionaries.
2170   if (needs_sort_ordinal)
2171     app_sorting_->EnsureValidOrdinals(extension_id, suggested_page_ordinal);
2172
2173   bool is_enabled = false;
2174   int initial_state;
2175   if (extension_dict->GetInteger(kPrefState, &initial_state)) {
2176     is_enabled = initial_state == Extension::ENABLED;
2177   }
2178   bool is_incognito_enabled = IsIncognitoEnabled(extension_id);
2179
2180   extension_pref_value_map_->RegisterExtension(
2181       extension_id, install_time, is_enabled, is_incognito_enabled);
2182
2183   FOR_EACH_OBSERVER(
2184       ExtensionPrefsObserver,
2185       observer_list_,
2186       OnExtensionRegistered(extension_id, install_time, is_enabled));
2187 }
2188
2189 }  // namespace extensions