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/metrics/histogram_macros.h"
  11 #include "base/prefs/pref_notifier.h"
  12 #include "base/prefs/pref_service.h"
  13 #include "base/strings/string_number_conversions.h"
  14 #include "base/strings/string_util.h"
  15 #include "base/trace_event/trace_event.h"
  16 #include "base/value_conversions.h"
  17 #include "components/crx_file/id_util.h"
  18 #include "components/pref_registry/pref_registry_syncable.h"
  19 #include "extensions/browser/app_sorting.h"
  20 #include "extensions/browser/event_router.h"
  21 #include "extensions/browser/extension_pref_store.h"
  22 #include "extensions/browser/extension_prefs_factory.h"
  23 #include "extensions/browser/extension_prefs_observer.h"
  24 #include "extensions/browser/install_flag.h"
  25 #include "extensions/browser/pref_names.h"
  26 #include "extensions/common/feature_switch.h"
  27 #include "extensions/common/manifest.h"
  28 #include "extensions/common/permissions/permission_set.h"
  29 #include "extensions/common/permissions/permissions_info.h"
  30 #include "extensions/common/url_pattern.h"
  31 #include "extensions/common/user_script.h"
  32 #include "ui/base/l10n/l10n_util.h"
  33
  34 using base::Value;
  35 using base::DictionaryValue;
  36 using base::ListValue;
  37
  38 namespace extensions {
  39
  40 namespace {
  41
  42 // Additional preferences keys, which are not needed by external clients.
  43
  44 // True if this extension is running. Note this preference stops getting updated
  45 // during Chrome shutdown (and won't be updated on a browser crash) and so can
  46 // be used at startup to determine whether the extension was running when Chrome
  47 // was last terminated.
  48 const char kPrefRunning[] = "running";
  49
  50 // Whether this extension had windows when it was last running.
  51 const char kIsActive[] = "is_active";
  52
  53 // Where an extension was installed from. (see Manifest::Location)
  54 const char kPrefLocation[] = "location";
  55
  56 // Enabled, disabled, killed, etc. (see Extension::State)
  57 const char kPrefState[] = "state";
  58
  59 // The path to the current version's manifest file.
  60 const char kPrefPath[] = "path";
  61
  62 // The dictionary containing the extension's manifest.
  63 const char kPrefManifest[] = "manifest";
  64
  65 // The version number.
  66 const char kPrefVersion[] = "manifest.version";
  67
  68 // Indicates whether an extension is blacklisted.
  69 const char kPrefBlacklist[] = "blacklist";
  70
  71 // If extension is greylisted.
  72 const char kPrefBlacklistState[] = "blacklist_state";
  73
  74 // The count of how many times we prompted the user to acknowledge an
  75 // extension.
  76 const char kPrefAcknowledgePromptCount[] = "ack_prompt_count";
  77
  78 // Indicates whether the user has acknowledged various types of extensions.
  79 const char kPrefExternalAcknowledged[] = "ack_external";
  80 const char kPrefBlacklistAcknowledged[] = "ack_blacklist";
  81
  82 // Indicates whether the external extension was installed during the first
  83 // run of this profile.
  84 const char kPrefExternalInstallFirstRun[] = "external_first_run";
  85
  86 // Indicates whether to show an install warning when the user enables.
  87 const char kExtensionDidEscalatePermissions[] = "install_warning_on_enable";
  88
  89 // DO NOT USE, use kPrefDisableReasons instead.
  90 // Indicates whether the extension was updated while it was disabled.
  91 const char kDeprecatedPrefDisableReason[] = "disable_reason";
  92
  93 // A bitmask of all the reasons an extension is disabled.
  94 const char kPrefDisableReasons[] = "disable_reasons";
  95
  96 // The key for a serialized Time value indicating the start of the day (from the
  97 // server's perspective) an extension last included a "ping" parameter during
  98 // its update check.
  99 const char kLastPingDay[] = "lastpingday";
 100
 101 // Similar to kLastPingDay, but for "active" instead of "rollcall" pings.
 102 const char kLastActivePingDay[] = "last_active_pingday";
 103
 104 // A bit we use to keep track of whether we need to do an "active" ping.
 105 const char kActiveBit[] = "active_bit";
 106
 107 // Path for settings specific to blacklist update.
 108 const char kExtensionsBlacklistUpdate[] = "extensions.blacklistupdate";
 109
 110 // Path for the delayed install info dictionary preference. The actual string
 111 // value is a legacy artifact for when delayed installs only pertained to
 112 // updates that were waiting for idle.
 113 const char kDelayedInstallInfo[] = "idle_install_info";
 114
 115 // Reason why the extension's install was delayed.
 116 const char kDelayedInstallReason[] = "delay_install_reason";
 117
 118 // Path for the suggested page ordinal of a delayed extension install.
 119 const char kPrefSuggestedPageOrdinal[] = "suggested_page_ordinal";
 120
 121 // A preference that, if true, will allow this extension to run in incognito
 122 // mode.
 123 const char kPrefIncognitoEnabled[] = "incognito";
 124
 125 // A preference to control whether an extension is allowed to inject script in
 126 // pages with file URLs.
 127 const char kPrefAllowFileAccess[] = "newAllowFileAccess";
 128 // TODO(jstritar): As part of fixing http://crbug.com/91577, we revoked all
 129 // extension file access by renaming the pref. We should eventually clean up
 130 // the old flag and possibly go back to that name.
 131 // const char kPrefAllowFileAccessOld[] = "allowFileAccess";
 132
 133 // A preference specifying if the user dragged the app on the NTP.
 134 const char kPrefUserDraggedApp[] = "user_dragged_app_ntp";
 135
 136 // Preferences that hold which permissions the user has granted the extension.
 137 // We explicitly keep track of these so that extensions can contain unknown
 138 // permissions, for backwards compatibility reasons, and we can still prompt
 139 // the user to accept them once recognized. We store the active permission
 140 // permissions because they may differ from those defined in the manifest.
 141 const char kPrefActivePermissions[] = "active_permissions";
 142 const char kPrefGrantedPermissions[] = "granted_permissions";
 143
 144 // The preference names for PermissionSet values.
 145 const char kPrefAPIs[] = "api";
 146 const char kPrefManifestPermissions[] = "manifest_permissions";
 147 const char kPrefExplicitHosts[] = "explicit_host";
 148 const char kPrefScriptableHosts[] = "scriptable_host";
 149
 150 // The preference names for the old granted permissions scheme.
 151 const char kPrefOldGrantedFullAccess[] = "granted_permissions.full";
 152 const char kPrefOldGrantedHosts[] = "granted_permissions.host";
 153 const char kPrefOldGrantedAPIs[] = "granted_permissions.api";
 154
 155 // A preference that indicates when an extension was installed.
 156 const char kPrefInstallTime[] = "install_time";
 157
 158 // A preference which saves the creation flags for extensions.
 159 const char kPrefCreationFlags[] = "creation_flags";
 160
 161 // A preference that indicates whether the extension was installed from the
 162 // Chrome Web Store.
 163 const char kPrefFromWebStore[] = "from_webstore";
 164
 165 // A preference that indicates whether the extension was installed from a
 166 // mock App created from a bookmark.
 167 const char kPrefFromBookmark[] = "from_bookmark";
 168
 169 // A preference that indicates whether the extension was installed as a
 170 // default app.
 171 const char kPrefWasInstalledByDefault[] = "was_installed_by_default";
 172
 173 // A preference that indicates whether the extension was installed as an
 174 // OEM app.
 175 const char kPrefWasInstalledByOem[] = "was_installed_by_oem";
 176
 177 // Key for Geometry Cache preference.
 178 const char kPrefGeometryCache[] = "geometry_cache";
 179
 180 // A preference that indicates when an extension is last launched.
 181 const char kPrefLastLaunchTime[] = "last_launch_time";
 182
 183 // A preference indicating whether the extension is an ephemeral app.
 184 const char kPrefEphemeralApp[] = "ephemeral_app";
 185
 186 // Am installation parameter bundled with an extension.
 187 const char kPrefInstallParam[] = "install_parameter";
 188
 189 // A list of installed ids and a signature.
 190 const char kInstallSignature[] = "extensions.install_signature";
 191
 192 // A boolean preference that indicates whether the extension should not be
 193 // synced. Default value is false.
 194 const char kPrefDoNotSync[] = "do_not_sync";
 195
 196 const char kCorruptedDisableCount[] = "extensions.corrupted_disable_count";
 197
 198 // Provider of write access to a dictionary storing extension prefs.
 199 class ScopedExtensionPrefUpdate : public DictionaryPrefUpdate {
 200  public:
 201   ScopedExtensionPrefUpdate(PrefService* service,
 202                             const std::string& extension_id) :
 203     DictionaryPrefUpdate(service, pref_names::kExtensions),
 204     extension_id_(extension_id) {}
 205
 206   ~ScopedExtensionPrefUpdate() override {}
 207
 208   // DictionaryPrefUpdate overrides:
 209   base::DictionaryValue* Get() override {
 210     base::DictionaryValue* dict = DictionaryPrefUpdate::Get();
 211     base::DictionaryValue* extension = NULL;
 212     if (!dict->GetDictionary(extension_id_, &extension)) {
 213       // Extension pref does not exist, create it.
 214       extension = new base::DictionaryValue();
 215       dict->SetWithoutPathExpansion(extension_id_, extension);
 216     }
 217     return extension;
 218   }
 219
 220  private:
 221   const std::string extension_id_;
 222
 223   DISALLOW_COPY_AND_ASSIGN(ScopedExtensionPrefUpdate);
 224 };
 225
 226 std::string JoinPrefs(const std::string& parent, const char* child) {
 227   return parent + "." + child;
 228 }
 229
 230 // Checks if kPrefBlacklist is set to true in the base::DictionaryValue.
 231 // Return false if the value is false or kPrefBlacklist does not exist.
 232 // This is used to decide if an extension is blacklisted.
 233 bool IsBlacklistBitSet(const base::DictionaryValue* ext) {
 234   bool bool_value;
 235   return ext->GetBoolean(kPrefBlacklist, &bool_value) && bool_value;
 236 }
 237
 238 void LoadExtensionControlledPrefs(ExtensionPrefs* prefs,
 239                                   ExtensionPrefValueMap* value_map,
 240                                   const std::string& extension_id,
 241                                   ExtensionPrefsScope scope) {
 242   std::string scope_string;
 243   if (!pref_names::ScopeToPrefName(scope, &scope_string))
 244     return;
 245   std::string key = extension_id + "." + scope_string;
 246
 247   const base::DictionaryValue* source_dict =
 248       prefs->pref_service()->GetDictionary(pref_names::kExtensions);
 249   const base::DictionaryValue* preferences = NULL;
 250   if (!source_dict->GetDictionary(key, &preferences))
 251     return;
 252
 253   for (base::DictionaryValue::Iterator iter(*preferences); !iter.IsAtEnd();
 254        iter.Advance()) {
 255     value_map->SetExtensionPref(
 256         extension_id, iter.key(), scope, iter.value().DeepCopy());
 257   }
 258 }
 259
 260 }  // namespace
 261
 262 //
 263 // TimeProvider
 264 //
 265
 266 ExtensionPrefs::TimeProvider::TimeProvider() {
 267 }
 268
 269 ExtensionPrefs::TimeProvider::~TimeProvider() {
 270 }
 271
 272 base::Time ExtensionPrefs::TimeProvider::GetCurrentTime() const {
 273   return base::Time::Now();
 274 }
 275
 276 //
 277 // ScopedUpdate
 278 //
 279 template <typename T, base::Value::Type type_enum_value>
 280 ExtensionPrefs::ScopedUpdate<T, type_enum_value>::ScopedUpdate(
 281     ExtensionPrefs* prefs,
 282     const std::string& extension_id,
 283     const std::string& key)
 284     : update_(prefs->pref_service(), pref_names::kExtensions),
 285       extension_id_(extension_id),
 286       key_(key) {
 287   DCHECK(crx_file::id_util::IdIsValid(extension_id_));
 288 }
 289
 290 template <typename T, base::Value::Type type_enum_value>
 291 ExtensionPrefs::ScopedUpdate<T, type_enum_value>::~ScopedUpdate() {
 292 }
 293
 294 template <typename T, base::Value::Type type_enum_value>
 295 T* ExtensionPrefs::ScopedUpdate<T, type_enum_value>::Get() {
 296   base::DictionaryValue* dict = update_.Get();
 297   base::DictionaryValue* extension = NULL;
 298   base::Value* key_value = NULL;
 299   if (!dict->GetDictionary(extension_id_, &extension) ||
 300       !extension->Get(key_, &key_value)) {
 301     return NULL;
 302   }
 303   return key_value->GetType() == type_enum_value ?
 304       static_cast<T*>(key_value) :
 305       NULL;
 306 }
 307
 308 template <typename T, base::Value::Type type_enum_value>
 309 T* ExtensionPrefs::ScopedUpdate<T, type_enum_value>::Create() {
 310   base::DictionaryValue* dict = update_.Get();
 311   base::DictionaryValue* extension = NULL;
 312   base::Value* key_value = NULL;
 313   T* value_as_t = NULL;
 314   if (!dict->GetDictionary(extension_id_, &extension)) {
 315     extension = new base::DictionaryValue;
 316     dict->SetWithoutPathExpansion(extension_id_, extension);
 317   }
 318   if (!extension->Get(key_, &key_value)) {
 319     value_as_t = new T;
 320     extension->SetWithoutPathExpansion(key_, value_as_t);
 321   } else {
 322     CHECK(key_value->GetType() == type_enum_value);
 323     value_as_t = static_cast<T*>(key_value);
 324   }
 325   return value_as_t;
 326 }
 327
 328 // Explicit instantiations for Dictionary and List value types.
 329 template class ExtensionPrefs::ScopedUpdate<base::DictionaryValue,
 330                                             base::Value::TYPE_DICTIONARY>;
 331 template class ExtensionPrefs::ScopedUpdate<base::ListValue,
 332                                             base::Value::TYPE_LIST>;
 333
 334 //
 335 // ExtensionPrefs
 336 //
 337
 338 // static
 339 ExtensionPrefs* ExtensionPrefs::Create(
 340     PrefService* prefs,
 341     const base::FilePath& root_dir,
 342     ExtensionPrefValueMap* extension_pref_value_map,
 343     scoped_ptr<AppSorting> app_sorting,
 344     bool extensions_disabled,
 345     const std::vector<ExtensionPrefsObserver*>& early_observers) {
 346   return ExtensionPrefs::Create(prefs,
 347                                 root_dir,
 348                                 extension_pref_value_map,
 349                                 app_sorting.Pass(),
 350                                 extensions_disabled,
 351                                 early_observers,
 352                                 make_scoped_ptr(new TimeProvider()));
 353 }
 354
 355 // static
 356 ExtensionPrefs* ExtensionPrefs::Create(
 357     PrefService* pref_service,
 358     const base::FilePath& root_dir,
 359     ExtensionPrefValueMap* extension_pref_value_map,
 360     scoped_ptr<AppSorting> app_sorting,
 361     bool extensions_disabled,
 362     const std::vector<ExtensionPrefsObserver*>& early_observers,
 363     scoped_ptr<TimeProvider> time_provider) {
 364   return new ExtensionPrefs(pref_service,
 365                             root_dir,
 366                             extension_pref_value_map,
 367                             app_sorting.Pass(),
 368                             time_provider.Pass(),
 369                             extensions_disabled,
 370                             early_observers);
 371 }
 372
 373 ExtensionPrefs::~ExtensionPrefs() {
 374 }
 375
 376 // static
 377 ExtensionPrefs* ExtensionPrefs::Get(content::BrowserContext* context) {
 378   return ExtensionPrefsFactory::GetInstance()->GetForBrowserContext(context);
 379 }
 380
 381 static base::FilePath::StringType MakePathRelative(const base::FilePath& parent,
 382                                              const base::FilePath& child) {
 383   if (!parent.IsParent(child))
 384     return child.value();
 385
 386   base::FilePath::StringType retval = child.value().substr(
 387       parent.value().length());
 388   if (base::FilePath::IsSeparator(retval[0]))
 389     return retval.substr(1);
 390   else
 391     return retval;
 392 }
 393
 394 void ExtensionPrefs::MakePathsRelative() {
 395   const base::DictionaryValue* dict =
 396       prefs_->GetDictionary(pref_names::kExtensions);
 397   if (!dict || dict->empty())
 398     return;
 399
 400   // Collect all extensions ids with absolute paths in |absolute_keys|.
 401   std::set<std::string> absolute_keys;
 402   for (base::DictionaryValue::Iterator i(*dict); !i.IsAtEnd(); i.Advance()) {
 403     const base::DictionaryValue* extension_dict = NULL;
 404     if (!i.value().GetAsDictionary(&extension_dict))
 405       continue;
 406     int location_value;
 407     if (extension_dict->GetInteger(kPrefLocation, &location_value) &&
 408         Manifest::IsUnpackedLocation(
 409             static_cast<Manifest::Location>(location_value))) {
 410       // Unpacked extensions can have absolute paths.
 411       continue;
 412     }
 413     base::FilePath::StringType path_string;
 414     if (!extension_dict->GetString(kPrefPath, &path_string))
 415       continue;
 416     base::FilePath path(path_string);
 417     if (path.IsAbsolute())
 418       absolute_keys.insert(i.key());
 419   }
 420   if (absolute_keys.empty())
 421     return;
 422
 423   // Fix these paths.
 424   DictionaryPrefUpdate update(prefs_, pref_names::kExtensions);
 425   base::DictionaryValue* update_dict = update.Get();
 426   for (std::set<std::string>::iterator i = absolute_keys.begin();
 427        i != absolute_keys.end(); ++i) {
 428     base::DictionaryValue* extension_dict = NULL;
 429     if (!update_dict->GetDictionaryWithoutPathExpansion(*i, &extension_dict)) {
 430       NOTREACHED() << "Control should never reach here for extension " << *i;
 431       continue;
 432     }
 433     base::FilePath::StringType path_string;
 434     extension_dict->GetString(kPrefPath, &path_string);
 435     base::FilePath path(path_string);
 436     extension_dict->SetString(kPrefPath,
 437         MakePathRelative(install_directory_, path));
 438   }
 439 }
 440
 441 const base::DictionaryValue* ExtensionPrefs::GetExtensionPref(
 442     const std::string& extension_id) const {
 443   const base::DictionaryValue* extensions =
 444       prefs_->GetDictionary(pref_names::kExtensions);
 445   const base::DictionaryValue* extension_dict = NULL;
 446   if (!extensions ||
 447       !extensions->GetDictionary(extension_id, &extension_dict)) {
 448     return NULL;
 449   }
 450   return extension_dict;
 451 }
 452
 453 void ExtensionPrefs::UpdateExtensionPref(const std::string& extension_id,
 454                                          const std::string& key,
 455                                          base::Value* data_value) {
 456   if (!crx_file::id_util::IdIsValid(extension_id)) {
 457     NOTREACHED() << "Invalid extension_id " << extension_id;
 458     return;
 459   }
 460   ScopedExtensionPrefUpdate update(prefs_, extension_id);
 461   if (data_value)
 462     update->Set(key, data_value);
 463   else
 464     update->Remove(key, NULL);
 465 }
 466
 467 void ExtensionPrefs::DeleteExtensionPrefs(const std::string& extension_id) {
 468   extension_pref_value_map_->UnregisterExtension(extension_id);
 469   FOR_EACH_OBSERVER(ExtensionPrefsObserver,
 470                     observer_list_,
 471                     OnExtensionPrefsDeleted(extension_id));
 472   DictionaryPrefUpdate update(prefs_, pref_names::kExtensions);
 473   base::DictionaryValue* dict = update.Get();
 474   dict->Remove(extension_id, NULL);
 475 }
 476
 477 bool ExtensionPrefs::ReadPrefAsBoolean(const std::string& extension_id,
 478                                        const std::string& pref_key,
 479                                        bool* out_value) const {
 480   const base::DictionaryValue* ext = GetExtensionPref(extension_id);
 481   if (!ext || !ext->GetBoolean(pref_key, out_value))
 482     return false;
 483
 484   return true;
 485 }
 486
 487 bool ExtensionPrefs::ReadPrefAsInteger(const std::string& extension_id,
 488                                        const std::string& pref_key,
 489                                        int* out_value) const {
 490   const base::DictionaryValue* ext = GetExtensionPref(extension_id);
 491   if (!ext || !ext->GetInteger(pref_key, out_value))
 492     return false;
 493
 494   return true;
 495 }
 496
 497 bool ExtensionPrefs::ReadPrefAsString(const std::string& extension_id,
 498                                       const std::string& pref_key,
 499                                       std::string* out_value) const {
 500   const base::DictionaryValue* ext = GetExtensionPref(extension_id);
 501   if (!ext || !ext->GetString(pref_key, out_value))
 502     return false;
 503
 504   return true;
 505 }
 506
 507 bool ExtensionPrefs::ReadPrefAsList(const std::string& extension_id,
 508                                     const std::string& pref_key,
 509                                     const base::ListValue** out_value) const {
 510   const base::DictionaryValue* ext = GetExtensionPref(extension_id);
 511   const base::ListValue* out = NULL;
 512   if (!ext || !ext->GetList(pref_key, &out))
 513     return false;
 514   if (out_value)
 515     *out_value = out;
 516
 517   return true;
 518 }
 519
 520 bool ExtensionPrefs::ReadPrefAsDictionary(
 521     const std::string& extension_id,
 522     const std::string& pref_key,
 523     const base::DictionaryValue** out_value) const {
 524   const base::DictionaryValue* ext = GetExtensionPref(extension_id);
 525   const base::DictionaryValue* out = NULL;
 526   if (!ext || !ext->GetDictionary(pref_key, &out))
 527     return false;
 528   if (out_value)
 529     *out_value = out;
 530
 531   return true;
 532 }
 533
 534 bool ExtensionPrefs::HasPrefForExtension(
 535     const std::string& extension_id) const {
 536   return GetExtensionPref(extension_id) != NULL;
 537 }
 538
 539 bool ExtensionPrefs::ReadPrefAsURLPatternSet(const std::string& extension_id,
 540                                              const std::string& pref_key,
 541                                              URLPatternSet* result,
 542                                              int valid_schemes) const {
 543   const base::ListValue* value = NULL;
 544   if (!ReadPrefAsList(extension_id, pref_key, &value))
 545     return false;
 546   const base::DictionaryValue* extension = GetExtensionPref(extension_id);
 547   if (!extension)
 548     return false;
 549   int location;
 550   if (extension->GetInteger(kPrefLocation, &location) &&
 551       static_cast<Manifest::Location>(location) == Manifest::COMPONENT) {
 552     valid_schemes |= URLPattern::SCHEME_CHROMEUI;
 553   }
 554
 555   bool allow_file_access = AllowFileAccess(extension_id);
 556   return result->Populate(*value, valid_schemes, allow_file_access, NULL);
 557 }
 558
 559 void ExtensionPrefs::SetExtensionPrefURLPatternSet(
 560     const std::string& extension_id,
 561     const std::string& pref_key,
 562     const URLPatternSet& new_value) {
 563   UpdateExtensionPref(extension_id, pref_key, new_value.ToValue().release());
 564 }
 565
 566 bool ExtensionPrefs::ReadPrefAsBooleanAndReturn(
 567     const std::string& extension_id,
 568     const std::string& pref_key) const {
 569   bool out_value = false;
 570   return ReadPrefAsBoolean(extension_id, pref_key, &out_value) && out_value;
 571 }
 572
 573 PermissionSet* ExtensionPrefs::ReadPrefAsPermissionSet(
 574     const std::string& extension_id,
 575     const std::string& pref_key) const {
 576   if (!GetExtensionPref(extension_id))
 577     return NULL;
 578
 579   // Retrieve the API permissions. Please refer SetExtensionPrefPermissionSet()
 580   // for api_values format.
 581   APIPermissionSet apis;
 582   const base::ListValue* api_values = NULL;
 583   std::string api_pref = JoinPrefs(pref_key, kPrefAPIs);
 584   if (ReadPrefAsList(extension_id, api_pref, &api_values)) {
 585     APIPermissionSet::ParseFromJSON(api_values,
 586                                     APIPermissionSet::kAllowInternalPermissions,
 587                                     &apis, NULL, NULL);
 588   }
 589
 590   // Retrieve the Manifest Keys permissions. Please refer to
 591   // |SetExtensionPrefPermissionSet| for manifest_permissions_values format.
 592   ManifestPermissionSet manifest_permissions;
 593   const base::ListValue* manifest_permissions_values = NULL;
 594   std::string manifest_permission_pref =
 595       JoinPrefs(pref_key, kPrefManifestPermissions);
 596   if (ReadPrefAsList(extension_id, manifest_permission_pref,
 597                      &manifest_permissions_values)) {
 598     ManifestPermissionSet::ParseFromJSON(
 599         manifest_permissions_values, &manifest_permissions, NULL, NULL);
 600   }
 601
 602   // Retrieve the explicit host permissions.
 603   URLPatternSet explicit_hosts;
 604   ReadPrefAsURLPatternSet(
 605       extension_id, JoinPrefs(pref_key, kPrefExplicitHosts),
 606       &explicit_hosts, Extension::kValidHostPermissionSchemes);
 607
 608   // Retrieve the scriptable host permissions.
 609   URLPatternSet scriptable_hosts;
 610   ReadPrefAsURLPatternSet(
 611       extension_id, JoinPrefs(pref_key, kPrefScriptableHosts),
 612       &scriptable_hosts, UserScript::ValidUserScriptSchemes());
 613
 614   return new PermissionSet(
 615       apis, manifest_permissions, explicit_hosts, scriptable_hosts);
 616 }
 617
 618 // Set the API or Manifest permissions.
 619 // The format of api_values is:
 620 // [ "permission_name1",   // permissions do not support detail.
 621 //   "permission_name2",
 622 //   {"permission_name3": value },
 623 //   // permission supports detail, permission detail will be stored in value.
 624 //   ...
 625 // ]
 626 template<typename T>
 627 static base::ListValue* CreatePermissionList(const T& permissions) {
 628   base::ListValue* values = new base::ListValue();
 629   for (typename T::const_iterator i = permissions.begin();
 630       i != permissions.end(); ++i) {
 631     scoped_ptr<base::Value> detail(i->ToValue());
 632     if (detail) {
 633       base::DictionaryValue* tmp = new base::DictionaryValue();
 634       tmp->Set(i->name(), detail.release());
 635       values->Append(tmp);
 636     } else {
 637       values->Append(new base::StringValue(i->name()));
 638     }
 639   }
 640   return values;
 641 }
 642
 643 void ExtensionPrefs::SetExtensionPrefPermissionSet(
 644     const std::string& extension_id,
 645     const std::string& pref_key,
 646     const PermissionSet* new_value) {
 647   std::string api_pref = JoinPrefs(pref_key, kPrefAPIs);
 648   base::ListValue* api_values = CreatePermissionList(new_value->apis());
 649   UpdateExtensionPref(extension_id, api_pref, api_values);
 650
 651   std::string manifest_permissions_pref =
 652       JoinPrefs(pref_key, kPrefManifestPermissions);
 653   base::ListValue* manifest_permissions_values = CreatePermissionList(
 654       new_value->manifest_permissions());
 655   UpdateExtensionPref(extension_id,
 656                       manifest_permissions_pref,
 657                       manifest_permissions_values);
 658
 659   // Set the explicit host permissions.
 660   if (!new_value->explicit_hosts().is_empty()) {
 661     SetExtensionPrefURLPatternSet(extension_id,
 662                                   JoinPrefs(pref_key, kPrefExplicitHosts),
 663                                   new_value->explicit_hosts());
 664   }
 665
 666   // Set the scriptable host permissions.
 667   if (!new_value->scriptable_hosts().is_empty()) {
 668     SetExtensionPrefURLPatternSet(extension_id,
 669                                   JoinPrefs(pref_key, kPrefScriptableHosts),
 670                                   new_value->scriptable_hosts());
 671   }
 672 }
 673
 674 int ExtensionPrefs::IncrementAcknowledgePromptCount(
 675     const std::string& extension_id) {
 676   int count = 0;
 677   ReadPrefAsInteger(extension_id, kPrefAcknowledgePromptCount, &count);
 678   ++count;
 679   UpdateExtensionPref(extension_id, kPrefAcknowledgePromptCount,
 680                       new base::FundamentalValue(count));
 681   return count;
 682 }
 683
 684 bool ExtensionPrefs::IsExternalExtensionAcknowledged(
 685     const std::string& extension_id) const {
 686   return ReadPrefAsBooleanAndReturn(extension_id, kPrefExternalAcknowledged);
 687 }
 688
 689 void ExtensionPrefs::AcknowledgeExternalExtension(
 690     const std::string& extension_id) {
 691   DCHECK(crx_file::id_util::IdIsValid(extension_id));
 692   UpdateExtensionPref(extension_id, kPrefExternalAcknowledged,
 693                       new base::FundamentalValue(true));
 694   UpdateExtensionPref(extension_id, kPrefAcknowledgePromptCount, NULL);
 695 }
 696
 697 bool ExtensionPrefs::IsBlacklistedExtensionAcknowledged(
 698     const std::string& extension_id) const {
 699   return ReadPrefAsBooleanAndReturn(extension_id, kPrefBlacklistAcknowledged);
 700 }
 701
 702 void ExtensionPrefs::AcknowledgeBlacklistedExtension(
 703     const std::string& extension_id) {
 704   DCHECK(crx_file::id_util::IdIsValid(extension_id));
 705   UpdateExtensionPref(extension_id, kPrefBlacklistAcknowledged,
 706                       new base::FundamentalValue(true));
 707   UpdateExtensionPref(extension_id, kPrefAcknowledgePromptCount, NULL);
 708 }
 709
 710 bool ExtensionPrefs::IsExternalInstallFirstRun(
 711     const std::string& extension_id) const {
 712   return ReadPrefAsBooleanAndReturn(extension_id, kPrefExternalInstallFirstRun);
 713 }
 714
 715 void ExtensionPrefs::SetExternalInstallFirstRun(
 716     const std::string& extension_id) {
 717   DCHECK(crx_file::id_util::IdIsValid(extension_id));
 718   UpdateExtensionPref(extension_id, kPrefExternalInstallFirstRun,
 719                       new base::FundamentalValue(true));
 720 }
 721
 722 bool ExtensionPrefs::SetAlertSystemFirstRun() {
 723   if (prefs_->GetBoolean(pref_names::kAlertsInitialized)) {
 724     return true;
 725   }
 726   prefs_->SetBoolean(pref_names::kAlertsInitialized, true);
 727   return false;
 728 }
 729
 730 bool ExtensionPrefs::DidExtensionEscalatePermissions(
 731     const std::string& extension_id) const {
 732   return ReadPrefAsBooleanAndReturn(extension_id,
 733                                     kExtensionDidEscalatePermissions);
 734 }
 735
 736 void ExtensionPrefs::SetDidExtensionEscalatePermissions(
 737     const Extension* extension, bool did_escalate) {
 738   UpdateExtensionPref(extension->id(), kExtensionDidEscalatePermissions,
 739                       new base::FundamentalValue(did_escalate));
 740 }
 741
 742 int ExtensionPrefs::GetDisableReasons(const std::string& extension_id) const {
 743   int value = -1;
 744   if (ReadPrefAsInteger(extension_id, kPrefDisableReasons, &value) &&
 745       value >= 0) {
 746     return value;
 747   }
 748   return Extension::DISABLE_NONE;
 749 }
 750
 751 bool ExtensionPrefs::HasDisableReason(
 752     const std::string& extension_id,
 753     Extension::DisableReason disable_reason) const {
 754   return (GetDisableReasons(extension_id) & disable_reason) != 0;
 755 }
 756
 757 void ExtensionPrefs::AddDisableReason(const std::string& extension_id,
 758                                       Extension::DisableReason disable_reason) {
 759   ModifyDisableReasons(extension_id, disable_reason, DISABLE_REASON_ADD);
 760 }
 761
 762 void ExtensionPrefs::AddDisableReasons(const std::string& extension_id,
 763                                        int disable_reasons) {
 764   ModifyDisableReasons(extension_id, disable_reasons, DISABLE_REASON_ADD);
 765 }
 766
 767 void ExtensionPrefs::RemoveDisableReason(
 768     const std::string& extension_id,
 769     Extension::DisableReason disable_reason) {
 770   ModifyDisableReasons(extension_id, disable_reason, DISABLE_REASON_REMOVE);
 771 }
 772
 773 void ExtensionPrefs::ClearDisableReasons(const std::string& extension_id) {
 774   ModifyDisableReasons(extension_id, Extension::DISABLE_NONE,
 775                        DISABLE_REASON_CLEAR);
 776 }
 777
 778 void ExtensionPrefs::ModifyDisableReasons(const std::string& extension_id,
 779                                           int reasons,
 780                                           DisableReasonChange change) {
 781   int old_value = GetDisableReasons(extension_id);
 782   int new_value = old_value;
 783   switch (change) {
 784     case DISABLE_REASON_ADD:
 785       new_value |= reasons;
 786       break;
 787     case DISABLE_REASON_REMOVE:
 788       new_value &= ~reasons;
 789       break;
 790     case DISABLE_REASON_CLEAR:
 791       new_value = Extension::DISABLE_NONE;
 792       break;
 793   }
 794
 795   if (old_value == new_value)  // no change, return.
 796     return;
 797
 798   if (new_value == Extension::DISABLE_NONE) {
 799     UpdateExtensionPref(extension_id, kPrefDisableReasons, NULL);
 800   } else {
 801     UpdateExtensionPref(extension_id,
 802                         kPrefDisableReasons,
 803                         new base::FundamentalValue(new_value));
 804   }
 805
 806   FOR_EACH_OBSERVER(ExtensionPrefsObserver,
 807                     observer_list_,
 808                     OnExtensionDisableReasonsChanged(extension_id, new_value));
 809 }
 810
 811 std::set<std::string> ExtensionPrefs::GetBlacklistedExtensions() const {
 812   std::set<std::string> ids;
 813
 814   const base::DictionaryValue* extensions =
 815       prefs_->GetDictionary(pref_names::kExtensions);
 816   if (!extensions)
 817     return ids;
 818
 819   for (base::DictionaryValue::Iterator it(*extensions);
 820        !it.IsAtEnd(); it.Advance()) {
 821     if (!it.value().IsType(base::Value::TYPE_DICTIONARY)) {
 822       NOTREACHED() << "Invalid pref for extension " << it.key();
 823       continue;
 824     }
 825     if (IsBlacklistBitSet(
 826             static_cast<const base::DictionaryValue*>(&it.value()))) {
 827       ids.insert(it.key());
 828     }
 829   }
 830
 831   return ids;
 832 }
 833
 834 void ExtensionPrefs::SetExtensionBlacklisted(const std::string& extension_id,
 835                                              bool is_blacklisted) {
 836   bool currently_blacklisted = IsExtensionBlacklisted(extension_id);
 837   if (is_blacklisted == currently_blacklisted)
 838     return;
 839
 840   // Always make sure the "acknowledged" bit is cleared since the blacklist bit
 841   // is changing.
 842   UpdateExtensionPref(extension_id, kPrefBlacklistAcknowledged, NULL);
 843
 844   if (is_blacklisted) {
 845     UpdateExtensionPref(extension_id,
 846                         kPrefBlacklist,
 847                         new base::FundamentalValue(true));
 848   } else {
 849     UpdateExtensionPref(extension_id, kPrefBlacklist, NULL);
 850     const base::DictionaryValue* dict = GetExtensionPref(extension_id);
 851     if (dict && dict->empty())
 852       DeleteExtensionPrefs(extension_id);
 853   }
 854 }
 855
 856 bool ExtensionPrefs::IsExtensionBlacklisted(const std::string& id) const {
 857   const base::DictionaryValue* ext_prefs = GetExtensionPref(id);
 858   return ext_prefs && IsBlacklistBitSet(ext_prefs);
 859 }
 860
 861 namespace {
 862
 863 // Serializes a 64bit integer as a string value.
 864 void SaveInt64(base::DictionaryValue* dictionary,
 865                const char* key,
 866                const int64 value) {
 867   if (!dictionary)
 868     return;
 869
 870   std::string string_value = base::Int64ToString(value);
 871   dictionary->SetString(key, string_value);
 872 }
 873
 874 // Deserializes a 64bit integer stored as a string value.
 875 bool ReadInt64(const base::DictionaryValue* dictionary,
 876                const char* key,
 877                int64* value) {
 878   if (!dictionary)
 879     return false;
 880
 881   std::string string_value;
 882   if (!dictionary->GetString(key, &string_value))
 883     return false;
 884
 885   return base::StringToInt64(string_value, value);
 886 }
 887
 888 // Serializes |time| as a string value mapped to |key| in |dictionary|.
 889 void SaveTime(base::DictionaryValue* dictionary,
 890               const char* key,
 891               const base::Time& time) {
 892   SaveInt64(dictionary, key, time.ToInternalValue());
 893 }
 894
 895 // The opposite of SaveTime. If |key| is not found, this returns an empty Time
 896 // (is_null() will return true).
 897 base::Time ReadTime(const base::DictionaryValue* dictionary, const char* key) {
 898   int64 value;
 899   if (ReadInt64(dictionary, key, &value))
 900     return base::Time::FromInternalValue(value);
 901
 902   return base::Time();
 903 }
 904
 905 }  // namespace
 906
 907 base::Time ExtensionPrefs::LastPingDay(const std::string& extension_id) const {
 908   DCHECK(crx_file::id_util::IdIsValid(extension_id));
 909   return ReadTime(GetExtensionPref(extension_id), kLastPingDay);
 910 }
 911
 912 void ExtensionPrefs::SetLastPingDay(const std::string& extension_id,
 913                                     const base::Time& time) {
 914   DCHECK(crx_file::id_util::IdIsValid(extension_id));
 915   ScopedExtensionPrefUpdate update(prefs_, extension_id);
 916   SaveTime(update.Get(), kLastPingDay, time);
 917 }
 918
 919 base::Time ExtensionPrefs::BlacklistLastPingDay() const {
 920   return ReadTime(prefs_->GetDictionary(kExtensionsBlacklistUpdate),
 921                   kLastPingDay);
 922 }
 923
 924 void ExtensionPrefs::SetBlacklistLastPingDay(const base::Time& time) {
 925   DictionaryPrefUpdate update(prefs_, kExtensionsBlacklistUpdate);
 926   SaveTime(update.Get(), kLastPingDay, time);
 927 }
 928
 929 base::Time ExtensionPrefs::LastActivePingDay(
 930     const std::string& extension_id) const {
 931   DCHECK(crx_file::id_util::IdIsValid(extension_id));
 932   return ReadTime(GetExtensionPref(extension_id), kLastActivePingDay);
 933 }
 934
 935 void ExtensionPrefs::SetLastActivePingDay(const std::string& extension_id,
 936                                           const base::Time& time) {
 937   DCHECK(crx_file::id_util::IdIsValid(extension_id));
 938   ScopedExtensionPrefUpdate update(prefs_, extension_id);
 939   SaveTime(update.Get(), kLastActivePingDay, time);
 940 }
 941
 942 bool ExtensionPrefs::GetActiveBit(const std::string& extension_id) const {
 943   const base::DictionaryValue* dictionary = GetExtensionPref(extension_id);
 944   bool result = false;
 945   if (dictionary && dictionary->GetBoolean(kActiveBit, &result))
 946     return result;
 947   return false;
 948 }
 949
 950 void ExtensionPrefs::SetActiveBit(const std::string& extension_id,
 951                                   bool active) {
 952   UpdateExtensionPref(extension_id, kActiveBit,
 953                       new base::FundamentalValue(active));
 954 }
 955
 956 void ExtensionPrefs::MigratePermissions(const ExtensionIdList& extension_ids) {
 957   PermissionsInfo* info = PermissionsInfo::GetInstance();
 958   for (ExtensionIdList::const_iterator ext_id =
 959        extension_ids.begin(); ext_id != extension_ids.end(); ++ext_id) {
 960     // An extension's granted permissions need to be migrated if the
 961     // full_access bit is present. This bit was always present in the previous
 962     // scheme and is never present now.
 963     bool full_access = false;
 964     const base::DictionaryValue* ext = GetExtensionPref(*ext_id);
 965     if (!ext || !ext->GetBoolean(kPrefOldGrantedFullAccess, &full_access))
 966       continue;
 967
 968     // Remove the full access bit (empty list will get trimmed).
 969     UpdateExtensionPref(
 970         *ext_id, kPrefOldGrantedFullAccess, new base::ListValue());
 971
 972     // Add the plugin permission if the full access bit was set.
 973     if (full_access) {
 974       const base::ListValue* apis = NULL;
 975       base::ListValue* new_apis = NULL;
 976
 977       std::string granted_apis = JoinPrefs(kPrefGrantedPermissions, kPrefAPIs);
 978       if (ext->GetList(kPrefOldGrantedAPIs, &apis))
 979         new_apis = apis->DeepCopy();
 980       else
 981         new_apis = new base::ListValue();
 982
 983       std::string plugin_name = info->GetByID(APIPermission::kPlugin)->name();
 984       new_apis->Append(new base::StringValue(plugin_name));
 985       UpdateExtensionPref(*ext_id, granted_apis, new_apis);
 986     }
 987
 988     // The granted permissions originally only held the effective hosts,
 989     // which are a combination of host and user script host permissions.
 990     // We now maintain these lists separately. For migration purposes, it
 991     // does not matter how we treat the old effective hosts as long as the
 992     // new effective hosts will be the same, so we move them to explicit
 993     // host permissions.
 994     const base::ListValue* hosts = NULL;
 995     std::string explicit_hosts =
 996         JoinPrefs(kPrefGrantedPermissions, kPrefExplicitHosts);
 997     if (ext->GetList(kPrefOldGrantedHosts, &hosts)) {
 998       UpdateExtensionPref(
 999           *ext_id, explicit_hosts, hosts->DeepCopy());
1000
1001       // We can get rid of the old one by setting it to an empty list.
1002       UpdateExtensionPref(*ext_id, kPrefOldGrantedHosts, new base::ListValue());
1003     }
1004   }
1005 }
1006
1007 void ExtensionPrefs::MigrateDisableReasons(
1008     const ExtensionIdList& extension_ids) {
1009   for (ExtensionIdList::const_iterator ext_id =
1010        extension_ids.begin(); ext_id != extension_ids.end(); ++ext_id) {
1011     int value = -1;
1012     if (ReadPrefAsInteger(*ext_id, kDeprecatedPrefDisableReason, &value)) {
1013       int new_value = Extension::DISABLE_NONE;
1014       switch (value) {
1015         case Extension::DEPRECATED_DISABLE_USER_ACTION:
1016           new_value = Extension::DISABLE_USER_ACTION;
1017           break;
1018         case Extension::DEPRECATED_DISABLE_PERMISSIONS_INCREASE:
1019           new_value = Extension::DISABLE_PERMISSIONS_INCREASE;
1020           break;
1021         case Extension::DEPRECATED_DISABLE_RELOAD:
1022           new_value = Extension::DISABLE_RELOAD;
1023           break;
1024       }
1025
1026       UpdateExtensionPref(*ext_id, kPrefDisableReasons,
1027                           new base::FundamentalValue(new_value));
1028       // Remove the old disable reason.
1029       UpdateExtensionPref(*ext_id, kDeprecatedPrefDisableReason, NULL);
1030     }
1031   }
1032 }
1033
1034 PermissionSet* ExtensionPrefs::GetGrantedPermissions(
1035     const std::string& extension_id) const {
1036   CHECK(crx_file::id_util::IdIsValid(extension_id));
1037   return ReadPrefAsPermissionSet(extension_id, kPrefGrantedPermissions);
1038 }
1039
1040 void ExtensionPrefs::AddGrantedPermissions(
1041     const std::string& extension_id,
1042     const PermissionSet* permissions) {
1043   CHECK(crx_file::id_util::IdIsValid(extension_id));
1044
1045   scoped_refptr<PermissionSet> granted_permissions(
1046       GetGrantedPermissions(extension_id));
1047
1048   // The new granted permissions are the union of the already granted
1049   // permissions and the newly granted permissions.
1050   scoped_refptr<PermissionSet> new_perms(
1051       PermissionSet::CreateUnion(
1052           permissions, granted_permissions.get()));
1053
1054   SetExtensionPrefPermissionSet(
1055       extension_id, kPrefGrantedPermissions, new_perms.get());
1056 }
1057
1058 void ExtensionPrefs::RemoveGrantedPermissions(
1059     const std::string& extension_id,
1060     const PermissionSet* permissions) {
1061   CHECK(crx_file::id_util::IdIsValid(extension_id));
1062
1063   scoped_refptr<PermissionSet> granted_permissions(
1064       GetGrantedPermissions(extension_id));
1065
1066   // The new granted permissions are the difference of the already granted
1067   // permissions and the newly ungranted permissions.
1068   scoped_refptr<PermissionSet> new_perms(
1069       PermissionSet::CreateDifference(
1070           granted_permissions.get(), permissions));
1071
1072   SetExtensionPrefPermissionSet(
1073       extension_id, kPrefGrantedPermissions, new_perms.get());
1074 }
1075
1076 PermissionSet* ExtensionPrefs::GetActivePermissions(
1077     const std::string& extension_id) const {
1078   CHECK(crx_file::id_util::IdIsValid(extension_id));
1079   return ReadPrefAsPermissionSet(extension_id, kPrefActivePermissions);
1080 }
1081
1082 void ExtensionPrefs::SetActivePermissions(
1083     const std::string& extension_id,
1084     const PermissionSet* permissions) {
1085   SetExtensionPrefPermissionSet(
1086       extension_id, kPrefActivePermissions, permissions);
1087 }
1088
1089 void ExtensionPrefs::SetExtensionRunning(const std::string& extension_id,
1090     bool is_running) {
1091   base::Value* value = new base::FundamentalValue(is_running);
1092   UpdateExtensionPref(extension_id, kPrefRunning, value);
1093 }
1094
1095 bool ExtensionPrefs::IsExtensionRunning(const std::string& extension_id) const {
1096   const base::DictionaryValue* extension = GetExtensionPref(extension_id);
1097   if (!extension)
1098     return false;
1099   bool running = false;
1100   extension->GetBoolean(kPrefRunning, &running);
1101   return running;
1102 }
1103
1104 void ExtensionPrefs::SetIsActive(const std::string& extension_id,
1105                                  bool is_active) {
1106   base::Value* value = new base::FundamentalValue(is_active);
1107   UpdateExtensionPref(extension_id, kIsActive, value);
1108 }
1109
1110 bool ExtensionPrefs::IsActive(const std::string& extension_id) const {
1111   const base::DictionaryValue* extension = GetExtensionPref(extension_id);
1112   if (!extension)
1113     return false;
1114   bool is_active = false;
1115   extension->GetBoolean(kIsActive, &is_active);
1116   return is_active;
1117 }
1118
1119 bool ExtensionPrefs::IsIncognitoEnabled(const std::string& extension_id) const {
1120   return ReadPrefAsBooleanAndReturn(extension_id, kPrefIncognitoEnabled);
1121 }
1122
1123 void ExtensionPrefs::SetIsIncognitoEnabled(const std::string& extension_id,
1124                                            bool enabled) {
1125   UpdateExtensionPref(extension_id, kPrefIncognitoEnabled,
1126                       new base::FundamentalValue(enabled));
1127   extension_pref_value_map_->SetExtensionIncognitoState(extension_id, enabled);
1128 }
1129
1130 bool ExtensionPrefs::AllowFileAccess(const std::string& extension_id) const {
1131   return ReadPrefAsBooleanAndReturn(extension_id, kPrefAllowFileAccess);
1132 }
1133
1134 void ExtensionPrefs::SetAllowFileAccess(const std::string& extension_id,
1135                                         bool allow) {
1136   UpdateExtensionPref(extension_id, kPrefAllowFileAccess,
1137                       new base::FundamentalValue(allow));
1138 }
1139
1140 bool ExtensionPrefs::HasAllowFileAccessSetting(
1141     const std::string& extension_id) const {
1142   const base::DictionaryValue* ext = GetExtensionPref(extension_id);
1143   return ext && ext->HasKey(kPrefAllowFileAccess);
1144 }
1145
1146 bool ExtensionPrefs::DoesExtensionHaveState(
1147     const std::string& id, Extension::State check_state) const {
1148   const base::DictionaryValue* extension = GetExtensionPref(id);
1149   int state = -1;
1150   if (!extension || !extension->GetInteger(kPrefState, &state))
1151     return false;
1152
1153   if (state < 0 || state >= Extension::NUM_STATES) {
1154     LOG(ERROR) << "Bad pref 'state' for extension '" << id << "'";
1155     return false;
1156   }
1157
1158   return state == check_state;
1159 }
1160
1161 bool ExtensionPrefs::IsExternalExtensionUninstalled(
1162     const std::string& id) const {
1163   return DoesExtensionHaveState(id, Extension::EXTERNAL_EXTENSION_UNINSTALLED);
1164 }
1165
1166 bool ExtensionPrefs::IsExtensionDisabled(
1167     const std::string& id) const {
1168   return DoesExtensionHaveState(id, Extension::DISABLED);
1169 }
1170
1171 ExtensionIdList ExtensionPrefs::GetToolbarOrder() const {
1172   ExtensionIdList id_list_out;
1173   GetUserExtensionPrefIntoContainer(pref_names::kToolbar, &id_list_out);
1174   return id_list_out;
1175 }
1176
1177 void ExtensionPrefs::SetToolbarOrder(const ExtensionIdList& extension_ids) {
1178   SetExtensionPrefFromContainer(pref_names::kToolbar, extension_ids);
1179 }
1180
1181 void ExtensionPrefs::OnExtensionInstalled(
1182     const Extension* extension,
1183     Extension::State initial_state,
1184     const syncer::StringOrdinal& page_ordinal,
1185     int install_flags,
1186     const std::string& install_parameter) {
1187   ScopedExtensionPrefUpdate update(prefs_, extension->id());
1188   base::DictionaryValue* extension_dict = update.Get();
1189   const base::Time install_time = time_provider_->GetCurrentTime();
1190   PopulateExtensionInfoPrefs(extension,
1191                              install_time,
1192                              initial_state,
1193                              install_flags,
1194                              install_parameter,
1195                              extension_dict);
1196
1197   bool requires_sort_ordinal = extension->RequiresSortOrdinal() &&
1198                                (install_flags & kInstallFlagIsEphemeral) == 0;
1199   FinishExtensionInfoPrefs(extension->id(),
1200                            install_time,
1201                            requires_sort_ordinal,
1202                            page_ordinal,
1203                            extension_dict);
1204 }
1205
1206 void ExtensionPrefs::OnExtensionUninstalled(const std::string& extension_id,
1207                                             const Manifest::Location& location,
1208                                             bool external_uninstall) {
1209   app_sorting_->ClearOrdinals(extension_id);
1210
1211   // For external extensions, we save a preference reminding ourself not to try
1212   // and install the extension anymore (except when |external_uninstall| is
1213   // true, which signifies that the registry key was deleted or the pref file
1214   // no longer lists the extension).
1215   if (!external_uninstall && Manifest::IsExternalLocation(location)) {
1216     UpdateExtensionPref(extension_id, kPrefState,
1217                         new base::FundamentalValue(
1218                             Extension::EXTERNAL_EXTENSION_UNINSTALLED));
1219     extension_pref_value_map_->SetExtensionState(extension_id, false);
1220     FOR_EACH_OBSERVER(ExtensionPrefsObserver,
1221                       observer_list_,
1222                       OnExtensionStateChanged(extension_id, false));
1223   } else {
1224     DeleteExtensionPrefs(extension_id);
1225   }
1226 }
1227
1228 void ExtensionPrefs::SetExtensionState(const std::string& extension_id,
1229                                        Extension::State state) {
1230   UpdateExtensionPref(extension_id, kPrefState,
1231                       new base::FundamentalValue(state));
1232   bool enabled = (state == Extension::ENABLED);
1233   extension_pref_value_map_->SetExtensionState(extension_id, enabled);
1234   FOR_EACH_OBSERVER(ExtensionPrefsObserver,
1235                     observer_list_,
1236                     OnExtensionStateChanged(extension_id, enabled));
1237 }
1238
1239 void ExtensionPrefs::SetExtensionBlacklistState(const std::string& extension_id,
1240                                                 BlacklistState state) {
1241   SetExtensionBlacklisted(extension_id, state == BLACKLISTED_MALWARE);
1242   UpdateExtensionPref(extension_id, kPrefBlacklistState,
1243                       new base::FundamentalValue(state));
1244 }
1245
1246 BlacklistState ExtensionPrefs::GetExtensionBlacklistState(
1247     const std::string& extension_id) const {
1248   if (IsExtensionBlacklisted(extension_id))
1249     return BLACKLISTED_MALWARE;
1250   const base::DictionaryValue* ext_prefs = GetExtensionPref(extension_id);
1251   int int_value = 0;
1252   if (ext_prefs && ext_prefs->GetInteger(kPrefBlacklistState, &int_value))
1253     return static_cast<BlacklistState>(int_value);
1254
1255   return NOT_BLACKLISTED;
1256 }
1257
1258 std::string ExtensionPrefs::GetVersionString(
1259     const std::string& extension_id) const {
1260   const base::DictionaryValue* extension = GetExtensionPref(extension_id);
1261   if (!extension)
1262     return std::string();
1263
1264   std::string version;
1265   extension->GetString(kPrefVersion, &version);
1266
1267   return version;
1268 }
1269
1270 void ExtensionPrefs::UpdateManifest(const Extension* extension) {
1271   if (!Manifest::IsUnpackedLocation(extension->location())) {
1272     const base::DictionaryValue* extension_dict =
1273         GetExtensionPref(extension->id());
1274     if (!extension_dict)
1275       return;
1276     const base::DictionaryValue* old_manifest = NULL;
1277     bool update_required =
1278         !extension_dict->GetDictionary(kPrefManifest, &old_manifest) ||
1279         !extension->manifest()->value()->Equals(old_manifest);
1280     if (update_required) {
1281       UpdateExtensionPref(extension->id(), kPrefManifest,
1282                           extension->manifest()->value()->DeepCopy());
1283     }
1284   }
1285 }
1286
1287 scoped_ptr<ExtensionInfo> ExtensionPrefs::GetInstalledInfoHelper(
1288     const std::string& extension_id,
1289     const base::DictionaryValue* extension) const {
1290   int location_value;
1291   if (!extension->GetInteger(kPrefLocation, &location_value))
1292     return scoped_ptr<ExtensionInfo>();
1293
1294   Manifest::Location location = static_cast<Manifest::Location>(location_value);
1295   if (location == Manifest::COMPONENT) {
1296     // Component extensions are ignored. Component extensions may have data
1297     // saved in preferences, but they are already loaded at this point (by
1298     // ComponentLoader) and shouldn't be populated into the result of
1299     // GetInstalledExtensionsInfo, otherwise InstalledLoader would also want to
1300     // load them.
1301     return scoped_ptr<ExtensionInfo>();
1302   }
1303
1304   // Only the following extension types have data saved in the preferences.
1305   if (location != Manifest::INTERNAL &&
1306       !Manifest::IsUnpackedLocation(location) &&
1307       !Manifest::IsExternalLocation(location)) {
1308     NOTREACHED();
1309     return scoped_ptr<ExtensionInfo>();
1310   }
1311
1312   const base::DictionaryValue* manifest = NULL;
1313   if (!Manifest::IsUnpackedLocation(location) &&
1314       !extension->GetDictionary(kPrefManifest, &manifest)) {
1315     LOG(WARNING) << "Missing manifest for extension " << extension_id;
1316     // Just a warning for now.
1317   }
1318
1319   base::FilePath::StringType path;
1320   if (!extension->GetString(kPrefPath, &path))
1321     return scoped_ptr<ExtensionInfo>();
1322
1323   // Make path absolute. Most (but not all) extension types have relative paths.
1324   if (!base::FilePath(path).IsAbsolute())
1325     path = install_directory_.Append(path).value();
1326
1327   return scoped_ptr<ExtensionInfo>(new ExtensionInfo(
1328       manifest, extension_id, base::FilePath(path), location));
1329 }
1330
1331 scoped_ptr<ExtensionInfo> ExtensionPrefs::GetInstalledExtensionInfo(
1332     const std::string& extension_id) const {
1333   const base::DictionaryValue* ext = NULL;
1334   const base::DictionaryValue* extensions =
1335       prefs_->GetDictionary(pref_names::kExtensions);
1336   if (!extensions ||
1337       !extensions->GetDictionaryWithoutPathExpansion(extension_id, &ext))
1338     return scoped_ptr<ExtensionInfo>();
1339   int state_value;
1340   if (ext->GetInteger(kPrefState, &state_value) &&
1341       state_value == Extension::EXTERNAL_EXTENSION_UNINSTALLED) {
1342     LOG(WARNING) << "External extension with id " << extension_id
1343                  << " has been uninstalled by the user";
1344     return scoped_ptr<ExtensionInfo>();
1345   }
1346
1347   return GetInstalledInfoHelper(extension_id, ext);
1348 }
1349
1350 scoped_ptr<ExtensionPrefs::ExtensionsInfo>
1351 ExtensionPrefs::GetInstalledExtensionsInfo() const {
1352   scoped_ptr<ExtensionsInfo> extensions_info(new ExtensionsInfo);
1353
1354   const base::DictionaryValue* extensions =
1355       prefs_->GetDictionary(pref_names::kExtensions);
1356   for (base::DictionaryValue::Iterator extension_id(*extensions);
1357        !extension_id.IsAtEnd(); extension_id.Advance()) {
1358     if (!crx_file::id_util::IdIsValid(extension_id.key()))
1359       continue;
1360
1361     scoped_ptr<ExtensionInfo> info =
1362         GetInstalledExtensionInfo(extension_id.key());
1363     if (info)
1364       extensions_info->push_back(linked_ptr<ExtensionInfo>(info.release()));
1365   }
1366
1367   return extensions_info.Pass();
1368 }
1369
1370 scoped_ptr<ExtensionPrefs::ExtensionsInfo>
1371 ExtensionPrefs::GetUninstalledExtensionsInfo() const {
1372   scoped_ptr<ExtensionsInfo> extensions_info(new ExtensionsInfo);
1373
1374   const base::DictionaryValue* extensions =
1375       prefs_->GetDictionary(pref_names::kExtensions);
1376   for (base::DictionaryValue::Iterator extension_id(*extensions);
1377        !extension_id.IsAtEnd(); extension_id.Advance()) {
1378     const base::DictionaryValue* ext = NULL;
1379     if (!crx_file::id_util::IdIsValid(extension_id.key()) ||
1380         !IsExternalExtensionUninstalled(extension_id.key()) ||
1381         !extension_id.value().GetAsDictionary(&ext))
1382       continue;
1383
1384     scoped_ptr<ExtensionInfo> info =
1385         GetInstalledInfoHelper(extension_id.key(), ext);
1386     if (info)
1387       extensions_info->push_back(linked_ptr<ExtensionInfo>(info.release()));
1388   }
1389
1390   return extensions_info.Pass();
1391 }
1392
1393 void ExtensionPrefs::SetDelayedInstallInfo(
1394     const Extension* extension,
1395     Extension::State initial_state,
1396     int install_flags,
1397     DelayReason delay_reason,
1398     const syncer::StringOrdinal& page_ordinal,
1399     const std::string& install_parameter) {
1400   base::DictionaryValue* extension_dict = new base::DictionaryValue();
1401   PopulateExtensionInfoPrefs(extension,
1402                              time_provider_->GetCurrentTime(),
1403                              initial_state,
1404                              install_flags,
1405                              install_parameter,
1406                              extension_dict);
1407
1408   // Add transient data that is needed by FinishDelayedInstallInfo(), but
1409   // should not be in the final extension prefs. All entries here should have
1410   // a corresponding Remove() call in FinishDelayedInstallInfo().
1411   if (extension->RequiresSortOrdinal() &&
1412       (install_flags & kInstallFlagIsEphemeral) == 0) {
1413     extension_dict->SetString(
1414         kPrefSuggestedPageOrdinal,
1415         page_ordinal.IsValid() ? page_ordinal.ToInternalValue()
1416                                : std::string());
1417   }
1418   extension_dict->SetInteger(kDelayedInstallReason,
1419                              static_cast<int>(delay_reason));
1420
1421   UpdateExtensionPref(extension->id(), kDelayedInstallInfo, extension_dict);
1422 }
1423
1424 bool ExtensionPrefs::RemoveDelayedInstallInfo(
1425     const std::string& extension_id) {
1426   if (!GetExtensionPref(extension_id))
1427     return false;
1428   ScopedExtensionPrefUpdate update(prefs_, extension_id);
1429   bool result = update->Remove(kDelayedInstallInfo, NULL);
1430   return result;
1431 }
1432
1433 bool ExtensionPrefs::FinishDelayedInstallInfo(
1434     const std::string& extension_id) {
1435   CHECK(crx_file::id_util::IdIsValid(extension_id));
1436   ScopedExtensionPrefUpdate update(prefs_, extension_id);
1437   base::DictionaryValue* extension_dict = update.Get();
1438   base::DictionaryValue* pending_install_dict = NULL;
1439   if (!extension_dict->GetDictionary(kDelayedInstallInfo,
1440                                      &pending_install_dict)) {
1441     return false;
1442   }
1443
1444   // Retrieve and clear transient values populated by SetDelayedInstallInfo().
1445   // Also do any other data cleanup that makes sense.
1446   std::string serialized_ordinal;
1447   syncer::StringOrdinal suggested_page_ordinal;
1448   bool needs_sort_ordinal = false;
1449   if (pending_install_dict->GetString(kPrefSuggestedPageOrdinal,
1450                                       &serialized_ordinal)) {
1451     suggested_page_ordinal = syncer::StringOrdinal(serialized_ordinal);
1452     needs_sort_ordinal = true;
1453     pending_install_dict->Remove(kPrefSuggestedPageOrdinal, NULL);
1454   }
1455   pending_install_dict->Remove(kDelayedInstallReason, NULL);
1456
1457   const base::Time install_time = time_provider_->GetCurrentTime();
1458   pending_install_dict->Set(
1459       kPrefInstallTime,
1460       new base::StringValue(
1461           base::Int64ToString(install_time.ToInternalValue())));
1462
1463   // Some extension pref values are written conditionally. If they are not
1464   // present in the delayed install data, they should be removed when the
1465   // delayed install is committed.
1466   extension_dict->Remove(kPrefEphemeralApp, NULL);
1467
1468   // Commit the delayed install data.
1469   for (base::DictionaryValue::Iterator it(*pending_install_dict); !it.IsAtEnd();
1470        it.Advance()) {
1471     extension_dict->Set(it.key(), it.value().DeepCopy());
1472   }
1473   FinishExtensionInfoPrefs(extension_id, install_time, needs_sort_ordinal,
1474                            suggested_page_ordinal, extension_dict);
1475   return true;
1476 }
1477
1478 scoped_ptr<ExtensionInfo> ExtensionPrefs::GetDelayedInstallInfo(
1479     const std::string& extension_id) const {
1480   const base::DictionaryValue* extension_prefs =
1481       GetExtensionPref(extension_id);
1482   if (!extension_prefs)
1483     return scoped_ptr<ExtensionInfo>();
1484
1485   const base::DictionaryValue* ext = NULL;
1486   if (!extension_prefs->GetDictionary(kDelayedInstallInfo, &ext))
1487     return scoped_ptr<ExtensionInfo>();
1488
1489   return GetInstalledInfoHelper(extension_id, ext);
1490 }
1491
1492 ExtensionPrefs::DelayReason ExtensionPrefs::GetDelayedInstallReason(
1493     const std::string& extension_id) const {
1494   const base::DictionaryValue* extension_prefs =
1495       GetExtensionPref(extension_id);
1496   if (!extension_prefs)
1497     return DELAY_REASON_NONE;
1498
1499   const base::DictionaryValue* ext = NULL;
1500   if (!extension_prefs->GetDictionary(kDelayedInstallInfo, &ext))
1501     return DELAY_REASON_NONE;
1502
1503   int delay_reason;
1504   if (!ext->GetInteger(kDelayedInstallReason, &delay_reason))
1505     return DELAY_REASON_NONE;
1506
1507   return static_cast<DelayReason>(delay_reason);
1508 }
1509
1510 scoped_ptr<ExtensionPrefs::ExtensionsInfo> ExtensionPrefs::
1511     GetAllDelayedInstallInfo() const {
1512   scoped_ptr<ExtensionsInfo> extensions_info(new ExtensionsInfo);
1513
1514   const base::DictionaryValue* extensions =
1515       prefs_->GetDictionary(pref_names::kExtensions);
1516   for (base::DictionaryValue::Iterator extension_id(*extensions);
1517        !extension_id.IsAtEnd(); extension_id.Advance()) {
1518     if (!crx_file::id_util::IdIsValid(extension_id.key()))
1519       continue;
1520
1521     scoped_ptr<ExtensionInfo> info = GetDelayedInstallInfo(extension_id.key());
1522     if (info)
1523       extensions_info->push_back(linked_ptr<ExtensionInfo>(info.release()));
1524   }
1525
1526   return extensions_info.Pass();
1527 }
1528
1529 bool ExtensionPrefs::IsEphemeralApp(const std::string& extension_id) const {
1530   if (ReadPrefAsBooleanAndReturn(extension_id, kPrefEphemeralApp))
1531     return true;
1532
1533   // Ephemerality was previously stored in the creation flags, so we must also
1534   // check it for backcompatibility.
1535   return (GetCreationFlags(extension_id) & Extension::IS_EPHEMERAL) != 0;
1536 }
1537
1538 void ExtensionPrefs::OnEphemeralAppPromoted(const std::string& extension_id) {
1539   DCHECK(IsEphemeralApp(extension_id));
1540
1541   UpdateExtensionPref(extension_id, kPrefEphemeralApp, NULL);
1542
1543   // Ephemerality was previously stored in the creation flags, so ensure the bit
1544   // is cleared.
1545   int creation_flags = Extension::NO_FLAGS;
1546   if (ReadPrefAsInteger(extension_id, kPrefCreationFlags, &creation_flags)) {
1547     if (creation_flags & Extension::IS_EPHEMERAL) {
1548       creation_flags &= ~static_cast<int>(Extension::IS_EPHEMERAL);
1549       UpdateExtensionPref(extension_id,
1550                           kPrefCreationFlags,
1551                           new base::FundamentalValue(creation_flags));
1552     }
1553   }
1554 }
1555
1556 bool ExtensionPrefs::WasAppDraggedByUser(
1557     const std::string& extension_id) const {
1558   return ReadPrefAsBooleanAndReturn(extension_id, kPrefUserDraggedApp);
1559 }
1560
1561 void ExtensionPrefs::SetAppDraggedByUser(const std::string& extension_id) {
1562   UpdateExtensionPref(extension_id, kPrefUserDraggedApp,
1563                       new base::FundamentalValue(true));
1564 }
1565
1566 bool ExtensionPrefs::IsFromWebStore(
1567     const std::string& extension_id) const {
1568   const base::DictionaryValue* dictionary = GetExtensionPref(extension_id);
1569   bool result = false;
1570   if (dictionary && dictionary->GetBoolean(kPrefFromWebStore, &result))
1571     return result;
1572   return false;
1573 }
1574
1575 bool ExtensionPrefs::IsFromBookmark(
1576     const std::string& extension_id) const {
1577   const base::DictionaryValue* dictionary = GetExtensionPref(extension_id);
1578   bool result = false;
1579   if (dictionary && dictionary->GetBoolean(kPrefFromBookmark, &result))
1580     return result;
1581   return false;
1582 }
1583
1584 int ExtensionPrefs::GetCreationFlags(const std::string& extension_id) const {
1585   int creation_flags = Extension::NO_FLAGS;
1586   if (!ReadPrefAsInteger(extension_id, kPrefCreationFlags, &creation_flags)) {
1587     // Since kPrefCreationFlags was added later, it will be missing for
1588     // previously installed extensions.
1589     if (IsFromBookmark(extension_id))
1590       creation_flags |= Extension::FROM_BOOKMARK;
1591     if (IsFromWebStore(extension_id))
1592       creation_flags |= Extension::FROM_WEBSTORE;
1593     if (WasInstalledByDefault(extension_id))
1594       creation_flags |= Extension::WAS_INSTALLED_BY_DEFAULT;
1595     if (WasInstalledByOem(extension_id))
1596       creation_flags |= Extension::WAS_INSTALLED_BY_OEM;
1597   }
1598   return creation_flags;
1599 }
1600
1601 int ExtensionPrefs::GetDelayedInstallCreationFlags(
1602     const std::string& extension_id) const {
1603   int creation_flags = Extension::NO_FLAGS;
1604   const base::DictionaryValue* delayed_info = NULL;
1605   if (ReadPrefAsDictionary(extension_id, kDelayedInstallInfo, &delayed_info)) {
1606     delayed_info->GetInteger(kPrefCreationFlags, &creation_flags);
1607   }
1608   return creation_flags;
1609 }
1610
1611 bool ExtensionPrefs::WasInstalledByDefault(
1612     const std::string& extension_id) const {
1613   const base::DictionaryValue* dictionary = GetExtensionPref(extension_id);
1614   bool result = false;
1615   if (dictionary &&
1616       dictionary->GetBoolean(kPrefWasInstalledByDefault, &result))
1617     return result;
1618   return false;
1619 }
1620
1621 bool ExtensionPrefs::WasInstalledByOem(const std::string& extension_id) const {
1622   const base::DictionaryValue* dictionary = GetExtensionPref(extension_id);
1623   bool result = false;
1624   if (dictionary && dictionary->GetBoolean(kPrefWasInstalledByOem, &result))
1625     return result;
1626   return false;
1627 }
1628
1629 base::Time ExtensionPrefs::GetInstallTime(
1630     const std::string& extension_id) const {
1631   const base::DictionaryValue* extension = GetExtensionPref(extension_id);
1632   if (!extension) {
1633     NOTREACHED();
1634     return base::Time();
1635   }
1636   std::string install_time_str;
1637   if (!extension->GetString(kPrefInstallTime, &install_time_str))
1638     return base::Time();
1639   int64 install_time_i64 = 0;
1640   if (!base::StringToInt64(install_time_str, &install_time_i64))
1641     return base::Time();
1642   return base::Time::FromInternalValue(install_time_i64);
1643 }
1644
1645 bool ExtensionPrefs::DoNotSync(const std::string& extension_id) const {
1646   bool do_not_sync;
1647   if (!ReadPrefAsBoolean(extension_id, kPrefDoNotSync, &do_not_sync))
1648     return false;
1649
1650   return do_not_sync;
1651 }
1652
1653 base::Time ExtensionPrefs::GetLastLaunchTime(
1654     const std::string& extension_id) const {
1655   const base::DictionaryValue* extension = GetExtensionPref(extension_id);
1656   if (!extension)
1657     return base::Time();
1658
1659   std::string launch_time_str;
1660   if (!extension->GetString(kPrefLastLaunchTime, &launch_time_str))
1661     return base::Time();
1662   int64 launch_time_i64 = 0;
1663   if (!base::StringToInt64(launch_time_str, &launch_time_i64))
1664     return base::Time();
1665   return base::Time::FromInternalValue(launch_time_i64);
1666 }
1667
1668 void ExtensionPrefs::SetLastLaunchTime(const std::string& extension_id,
1669                                        const base::Time& time) {
1670   DCHECK(crx_file::id_util::IdIsValid(extension_id));
1671   ScopedExtensionPrefUpdate update(prefs_, extension_id);
1672   SaveTime(update.Get(), kPrefLastLaunchTime, time);
1673 }
1674
1675 void ExtensionPrefs::ClearLastLaunchTimes() {
1676   const base::DictionaryValue* dict =
1677       prefs_->GetDictionary(pref_names::kExtensions);
1678   if (!dict || dict->empty())
1679     return;
1680
1681   // Collect all the keys to remove the last launched preference from.
1682   DictionaryPrefUpdate update(prefs_, pref_names::kExtensions);
1683   base::DictionaryValue* update_dict = update.Get();
1684   for (base::DictionaryValue::Iterator i(*update_dict); !i.IsAtEnd();
1685        i.Advance()) {
1686     base::DictionaryValue* extension_dict = NULL;
1687     if (!update_dict->GetDictionary(i.key(), &extension_dict))
1688       continue;
1689
1690     if (extension_dict->HasKey(kPrefLastLaunchTime))
1691       extension_dict->Remove(kPrefLastLaunchTime, NULL);
1692   }
1693 }
1694
1695 void ExtensionPrefs::GetExtensions(ExtensionIdList* out) const {
1696   CHECK(out);
1697
1698   scoped_ptr<ExtensionsInfo> extensions_info(GetInstalledExtensionsInfo());
1699
1700   for (size_t i = 0; i < extensions_info->size(); ++i) {
1701     ExtensionInfo* info = extensions_info->at(i).get();
1702     out->push_back(info->extension_id);
1703   }
1704 }
1705
1706 // static
1707 ExtensionIdList ExtensionPrefs::GetExtensionsFrom(
1708     const PrefService* pref_service) {
1709   ExtensionIdList result;
1710
1711   const base::DictionaryValue* extension_prefs = NULL;
1712   const base::Value* extension_prefs_value =
1713       pref_service->GetUserPrefValue(pref_names::kExtensions);
1714   if (!extension_prefs_value ||
1715       !extension_prefs_value->GetAsDictionary(&extension_prefs)) {
1716     return result;  // Empty set
1717   }
1718
1719   for (base::DictionaryValue::Iterator it(*extension_prefs); !it.IsAtEnd();
1720        it.Advance()) {
1721     const base::DictionaryValue* ext = NULL;
1722     if (!it.value().GetAsDictionary(&ext)) {
1723       NOTREACHED() << "Invalid pref for extension " << it.key();
1724       continue;
1725     }
1726     if (!IsBlacklistBitSet(ext))
1727       result.push_back(it.key());
1728   }
1729   return result;
1730 }
1731
1732 void ExtensionPrefs::AddObserver(ExtensionPrefsObserver* observer) {
1733   observer_list_.AddObserver(observer);
1734 }
1735
1736 void ExtensionPrefs::RemoveObserver(ExtensionPrefsObserver* observer) {
1737   observer_list_.RemoveObserver(observer);
1738 }
1739
1740 void ExtensionPrefs::FixMissingPrefs(const ExtensionIdList& extension_ids) {
1741   // Fix old entries that did not get an installation time entry when they
1742   // were installed or don't have a preferences field.
1743   for (ExtensionIdList::const_iterator ext_id = extension_ids.begin();
1744        ext_id != extension_ids.end(); ++ext_id) {
1745     if (GetInstallTime(*ext_id) == base::Time()) {
1746       VLOG(1) << "Could not parse installation time of extension "
1747               << *ext_id << ". It was probably installed before setting "
1748               << kPrefInstallTime << " was introduced. Updating "
1749               << kPrefInstallTime << " to the current time.";
1750       const base::Time install_time = time_provider_->GetCurrentTime();
1751       UpdateExtensionPref(*ext_id,
1752                           kPrefInstallTime,
1753                           new base::StringValue(base::Int64ToString(
1754                               install_time.ToInternalValue())));
1755     }
1756   }
1757 }
1758
1759 void ExtensionPrefs::InitPrefStore() {
1760   TRACE_EVENT0("browser,startup", "ExtensionPrefs::InitPrefStore")
1761   SCOPED_UMA_HISTOGRAM_TIMER("Extensions.InitPrefStoreTime");
1762
1763   if (extensions_disabled_) {
1764     extension_pref_value_map_->NotifyInitializationCompleted();
1765     return;
1766   }
1767
1768   // When this is called, the PrefService is initialized and provides access
1769   // to the user preferences stored in a JSON file.
1770   ExtensionIdList extension_ids;
1771   {
1772     SCOPED_UMA_HISTOGRAM_TIMER("Extensions.InitPrefGetExtensionsTime");
1773     GetExtensions(&extension_ids);
1774   }
1775   // Create empty preferences dictionary for each extension (these dictionaries
1776   // are pruned when persisting the preferences to disk).
1777   for (ExtensionIdList::iterator ext_id = extension_ids.begin();
1778        ext_id != extension_ids.end(); ++ext_id) {
1779     ScopedExtensionPrefUpdate update(prefs_, *ext_id);
1780     // This creates an empty dictionary if none is stored.
1781     update.Get();
1782   }
1783
1784   FixMissingPrefs(extension_ids);
1785   MigratePermissions(extension_ids);
1786   MigrateDisableReasons(extension_ids);
1787   app_sorting_->Initialize(extension_ids);
1788
1789   InitExtensionControlledPrefs(extension_pref_value_map_);
1790
1791   extension_pref_value_map_->NotifyInitializationCompleted();
1792 }
1793
1794 bool ExtensionPrefs::HasIncognitoPrefValue(const std::string& pref_key) const {
1795   bool has_incognito_pref_value = false;
1796   extension_pref_value_map_->GetEffectivePrefValue(pref_key,
1797                                                    true,
1798                                                    &has_incognito_pref_value);
1799   return has_incognito_pref_value;
1800 }
1801
1802 const base::DictionaryValue* ExtensionPrefs::GetGeometryCache(
1803     const std::string& extension_id) const {
1804   const base::DictionaryValue* extension_prefs = GetExtensionPref(extension_id);
1805   if (!extension_prefs)
1806     return NULL;
1807
1808   const base::DictionaryValue* ext = NULL;
1809   if (!extension_prefs->GetDictionary(kPrefGeometryCache, &ext))
1810     return NULL;
1811
1812   return ext;
1813 }
1814
1815 void ExtensionPrefs::SetGeometryCache(
1816     const std::string& extension_id,
1817     scoped_ptr<base::DictionaryValue> cache) {
1818   UpdateExtensionPref(extension_id, kPrefGeometryCache, cache.release());
1819 }
1820
1821 const base::DictionaryValue* ExtensionPrefs::GetInstallSignature() const {
1822   return prefs_->GetDictionary(kInstallSignature);
1823 }
1824
1825 void ExtensionPrefs::SetInstallSignature(
1826     const base::DictionaryValue* signature) {
1827   if (signature) {
1828     prefs_->Set(kInstallSignature, *signature);
1829     DVLOG(1) << "SetInstallSignature - saving";
1830   } else {
1831     DVLOG(1) << "SetInstallSignature - clearing";
1832     prefs_->ClearPref(kInstallSignature);
1833   }
1834 }
1835
1836 std::string ExtensionPrefs::GetInstallParam(
1837     const std::string& extension_id) const {
1838   const base::DictionaryValue* extension = GetExtensionPref(extension_id);
1839   if (!extension)  // Expected during unit testing.
1840     return std::string();
1841   std::string install_parameter;
1842   if (!extension->GetString(kPrefInstallParam, &install_parameter))
1843     return std::string();
1844   return install_parameter;
1845 }
1846
1847 void ExtensionPrefs::SetInstallParam(const std::string& extension_id,
1848                                      const std::string& install_parameter) {
1849   UpdateExtensionPref(extension_id,
1850                       kPrefInstallParam,
1851                       new base::StringValue(install_parameter));
1852 }
1853
1854 int ExtensionPrefs::GetCorruptedDisableCount() const {
1855   return prefs_->GetInteger(kCorruptedDisableCount);
1856 }
1857
1858 void ExtensionPrefs::IncrementCorruptedDisableCount() {
1859   int count = prefs_->GetInteger(kCorruptedDisableCount);
1860   prefs_->SetInteger(kCorruptedDisableCount, count + 1);
1861 }
1862
1863 ExtensionPrefs::ExtensionPrefs(
1864     PrefService* prefs,
1865     const base::FilePath& root_dir,
1866     ExtensionPrefValueMap* extension_pref_value_map,
1867     scoped_ptr<AppSorting> app_sorting,
1868     scoped_ptr<TimeProvider> time_provider,
1869     bool extensions_disabled,
1870     const std::vector<ExtensionPrefsObserver*>& early_observers)
1871     : prefs_(prefs),
1872       install_directory_(root_dir),
1873       extension_pref_value_map_(extension_pref_value_map),
1874       app_sorting_(app_sorting.Pass()),
1875       time_provider_(time_provider.Pass()),
1876       extensions_disabled_(extensions_disabled) {
1877   // TODO(mgiuca): Added these checks to try and diagnose
1878   // http://crbug.com/476648. Remove them after the investigation is concluded.
1879   CHECK(this);
1880   app_sorting_->SetExtensionScopedPrefs(this);
1881   app_sorting_->CheckExtensionScopedPrefs();
1882   MakePathsRelative();
1883
1884   // Ensure that any early observers are watching before prefs are initialized.
1885   for (std::vector<ExtensionPrefsObserver*>::const_iterator iter =
1886            early_observers.begin();
1887        iter != early_observers.end();
1888        ++iter) {
1889     AddObserver(*iter);
1890   }
1891
1892   InitPrefStore();
1893 }
1894
1895 void ExtensionPrefs::SetNeedsStorageGarbageCollection(bool value) {
1896   prefs_->SetBoolean(pref_names::kStorageGarbageCollect, value);
1897 }
1898
1899 bool ExtensionPrefs::NeedsStorageGarbageCollection() const {
1900   return prefs_->GetBoolean(pref_names::kStorageGarbageCollect);
1901 }
1902
1903 // static
1904 void ExtensionPrefs::RegisterProfilePrefs(
1905     user_prefs::PrefRegistrySyncable* registry) {
1906   registry->RegisterDictionaryPref(pref_names::kExtensions);
1907   registry->RegisterListPref(pref_names::kToolbar,
1908                              user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
1909   registry->RegisterIntegerPref(pref_names::kToolbarSize, -1);
1910   registry->RegisterDictionaryPref(kExtensionsBlacklistUpdate);
1911   registry->RegisterListPref(pref_names::kInstallAllowList);
1912   registry->RegisterListPref(pref_names::kInstallDenyList);
1913   registry->RegisterDictionaryPref(pref_names::kInstallForceList);
1914   registry->RegisterListPref(pref_names::kAllowedTypes);
1915   registry->RegisterBooleanPref(pref_names::kStorageGarbageCollect, false);
1916   registry->RegisterInt64Pref(pref_names::kLastUpdateCheck, 0);
1917   registry->RegisterInt64Pref(pref_names::kNextUpdateCheck, 0);
1918   registry->RegisterListPref(pref_names::kAllowedInstallSites);
1919   registry->RegisterStringPref(pref_names::kLastChromeVersion, std::string());
1920   registry->RegisterDictionaryPref(kInstallSignature);
1921
1922   registry->RegisterListPref(pref_names::kNativeMessagingBlacklist);
1923   registry->RegisterListPref(pref_names::kNativeMessagingWhitelist);
1924   registry->RegisterBooleanPref(pref_names::kNativeMessagingUserLevelHosts,
1925                                 true);
1926   registry->RegisterIntegerPref(kCorruptedDisableCount, 0);
1927
1928 #if !defined(OS_MACOSX)
1929   registry->RegisterBooleanPref(pref_names::kAppFullscreenAllowed, true);
1930 #endif
1931 }
1932
1933 template <class ExtensionIdContainer>
1934 bool ExtensionPrefs::GetUserExtensionPrefIntoContainer(
1935     const char* pref,
1936     ExtensionIdContainer* id_container_out) const {
1937   DCHECK(id_container_out->empty());
1938
1939   const base::Value* user_pref_value = prefs_->GetUserPrefValue(pref);
1940   const base::ListValue* user_pref_as_list;
1941   if (!user_pref_value || !user_pref_value->GetAsList(&user_pref_as_list))
1942     return false;
1943
1944   std::insert_iterator<ExtensionIdContainer> insert_iterator(
1945       *id_container_out, id_container_out->end());
1946   std::string extension_id;
1947   for (base::ListValue::const_iterator value_it = user_pref_as_list->begin();
1948        value_it != user_pref_as_list->end(); ++value_it) {
1949     if (!(*value_it)->GetAsString(&extension_id)) {
1950       NOTREACHED();
1951       continue;
1952     }
1953     insert_iterator = extension_id;
1954   }
1955   return true;
1956 }
1957
1958 template <class ExtensionIdContainer>
1959 void ExtensionPrefs::SetExtensionPrefFromContainer(
1960     const char* pref,
1961     const ExtensionIdContainer& strings) {
1962   ListPrefUpdate update(prefs_, pref);
1963   base::ListValue* list_of_values = update.Get();
1964   list_of_values->Clear();
1965   for (typename ExtensionIdContainer::const_iterator iter = strings.begin();
1966        iter != strings.end(); ++iter) {
1967     list_of_values->Append(new base::StringValue(*iter));
1968   }
1969 }
1970
1971 void ExtensionPrefs::PopulateExtensionInfoPrefs(
1972     const Extension* extension,
1973     const base::Time install_time,
1974     Extension::State initial_state,
1975     int install_flags,
1976     const std::string& install_parameter,
1977     base::DictionaryValue* extension_dict) const {
1978   extension_dict->Set(kPrefState, new base::FundamentalValue(initial_state));
1979   extension_dict->Set(kPrefLocation,
1980                       new base::FundamentalValue(extension->location()));
1981   extension_dict->Set(kPrefCreationFlags,
1982                       new base::FundamentalValue(extension->creation_flags()));
1983   extension_dict->Set(kPrefFromWebStore,
1984                       new base::FundamentalValue(extension->from_webstore()));
1985   extension_dict->Set(kPrefFromBookmark,
1986                       new base::FundamentalValue(extension->from_bookmark()));
1987   extension_dict->Set(
1988       kPrefWasInstalledByDefault,
1989       new base::FundamentalValue(extension->was_installed_by_default()));
1990   extension_dict->Set(
1991       kPrefWasInstalledByOem,
1992       new base::FundamentalValue(extension->was_installed_by_oem()));
1993   extension_dict->Set(kPrefInstallTime,
1994                       new base::StringValue(
1995                           base::Int64ToString(install_time.ToInternalValue())));
1996   if (install_flags & kInstallFlagIsBlacklistedForMalware)
1997     extension_dict->Set(kPrefBlacklist, new base::FundamentalValue(true));
1998
1999   if (install_flags & kInstallFlagIsEphemeral)
2000     extension_dict->Set(kPrefEphemeralApp, new base::FundamentalValue(true));
2001   else
2002     extension_dict->Remove(kPrefEphemeralApp, NULL);
2003
2004   base::FilePath::StringType path = MakePathRelative(install_directory_,
2005                                                      extension->path());
2006   extension_dict->Set(kPrefPath, new base::StringValue(path));
2007   if (!install_parameter.empty()) {
2008     extension_dict->Set(kPrefInstallParam,
2009                         new base::StringValue(install_parameter));
2010   }
2011   // We store prefs about LOAD extensions, but don't cache their manifest
2012   // since it may change on disk.
2013   if (!Manifest::IsUnpackedLocation(extension->location())) {
2014     extension_dict->Set(kPrefManifest,
2015                         extension->manifest()->value()->DeepCopy());
2016   }
2017
2018   // Only writes kPrefDoNotSync when it is not the default.
2019   if (install_flags & kInstallFlagDoNotSync)
2020     extension_dict->Set(kPrefDoNotSync, new base::FundamentalValue(true));
2021   else
2022     extension_dict->Remove(kPrefDoNotSync, NULL);
2023 }
2024
2025 void ExtensionPrefs::InitExtensionControlledPrefs(
2026     ExtensionPrefValueMap* value_map) {
2027   TRACE_EVENT0("browser,startup",
2028                "ExtensionPrefs::InitExtensionControlledPrefs")
2029   SCOPED_UMA_HISTOGRAM_TIMER("Extensions.InitExtensionControlledPrefsTime");
2030
2031   ExtensionIdList extension_ids;
2032   GetExtensions(&extension_ids);
2033
2034   for (ExtensionIdList::iterator extension_id = extension_ids.begin();
2035        extension_id != extension_ids.end();
2036        ++extension_id) {
2037     base::Time install_time = GetInstallTime(*extension_id);
2038     bool is_enabled = !IsExtensionDisabled(*extension_id);
2039     bool is_incognito_enabled = IsIncognitoEnabled(*extension_id);
2040     value_map->RegisterExtension(
2041         *extension_id, install_time, is_enabled, is_incognito_enabled);
2042
2043     FOR_EACH_OBSERVER(
2044         ExtensionPrefsObserver,
2045         observer_list_,
2046         OnExtensionRegistered(*extension_id, install_time, is_enabled));
2047
2048     // Set regular extension controlled prefs.
2049     LoadExtensionControlledPrefs(
2050         this, value_map, *extension_id, kExtensionPrefsScopeRegular);
2051     // Set incognito extension controlled prefs.
2052     LoadExtensionControlledPrefs(this,
2053                                  value_map,
2054                                  *extension_id,
2055                                  kExtensionPrefsScopeIncognitoPersistent);
2056     // Set regular-only extension controlled prefs.
2057     LoadExtensionControlledPrefs(
2058         this, value_map, *extension_id, kExtensionPrefsScopeRegularOnly);
2059
2060     FOR_EACH_OBSERVER(ExtensionPrefsObserver,
2061                       observer_list_,
2062                       OnExtensionPrefsLoaded(*extension_id, this));
2063   }
2064 }
2065
2066 void ExtensionPrefs::FinishExtensionInfoPrefs(
2067     const std::string& extension_id,
2068     const base::Time install_time,
2069     bool needs_sort_ordinal,
2070     const syncer::StringOrdinal& suggested_page_ordinal,
2071     base::DictionaryValue* extension_dict) {
2072   // Reinitializes various preferences with empty dictionaries.
2073   if (!extension_dict->HasKey(pref_names::kPrefPreferences)) {
2074     extension_dict->Set(pref_names::kPrefPreferences,
2075                         new base::DictionaryValue);
2076   }
2077
2078   if (!extension_dict->HasKey(pref_names::kPrefIncognitoPreferences)) {
2079     extension_dict->Set(pref_names::kPrefIncognitoPreferences,
2080                         new base::DictionaryValue);
2081   }
2082
2083   if (!extension_dict->HasKey(pref_names::kPrefRegularOnlyPreferences)) {
2084     extension_dict->Set(pref_names::kPrefRegularOnlyPreferences,
2085                         new base::DictionaryValue);
2086   }
2087
2088   if (!extension_dict->HasKey(pref_names::kPrefContentSettings))
2089     extension_dict->Set(pref_names::kPrefContentSettings, new base::ListValue);
2090
2091   if (!extension_dict->HasKey(pref_names::kPrefIncognitoContentSettings)) {
2092     extension_dict->Set(pref_names::kPrefIncognitoContentSettings,
2093                         new base::ListValue);
2094   }
2095
2096   // If this point has been reached, any pending installs should be considered
2097   // out of date.
2098   extension_dict->Remove(kDelayedInstallInfo, NULL);
2099
2100   // Clear state that may be registered from a previous install.
2101   extension_dict->Remove(EventRouter::kRegisteredEvents, NULL);
2102
2103   // FYI, all code below here races on sudden shutdown because |extension_dict|,
2104   // |app_sorting_|, |extension_pref_value_map_|, and (potentially) observers
2105   // are updated non-transactionally. This is probably not fixable without
2106   // nested transactional updates to pref dictionaries.
2107   if (needs_sort_ordinal)
2108     app_sorting_->EnsureValidOrdinals(extension_id, suggested_page_ordinal);
2109
2110   bool is_enabled = false;
2111   int initial_state;
2112   if (extension_dict->GetInteger(kPrefState, &initial_state)) {
2113     is_enabled = initial_state == Extension::ENABLED;
2114   }
2115   bool is_incognito_enabled = IsIncognitoEnabled(extension_id);
2116
2117   extension_pref_value_map_->RegisterExtension(
2118       extension_id, install_time, is_enabled, is_incognito_enabled);
2119
2120   FOR_EACH_OBSERVER(
2121       ExtensionPrefsObserver,
2122       observer_list_,
2123       OnExtensionRegistered(extension_id, install_time, is_enabled));
2124 }
2125
2126 }  // namespace extensions