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) {
 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) {
 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) {
 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) {
 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) {
 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) {
 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::RemoveDisableReason(
 763     const std::string& extension_id,
 764     Extension::DisableReason disable_reason) {
 765   ModifyDisableReasons(extension_id, disable_reason, DISABLE_REASON_REMOVE);
 766 }
 767
 768 void ExtensionPrefs::ClearDisableReasons(const std::string& extension_id) {
 769   ModifyDisableReasons(extension_id, Extension::DISABLE_NONE,
 770                        DISABLE_REASON_CLEAR);
 771 }
 772
 773 void ExtensionPrefs::ModifyDisableReasons(const std::string& extension_id,
 774                                           int reasons,
 775                                           DisableReasonChange change) {
 776   int old_value = GetDisableReasons(extension_id);
 777   int new_value = old_value;
 778   switch (change) {
 779     case DISABLE_REASON_ADD:
 780       new_value |= reasons;
 781       break;
 782     case DISABLE_REASON_REMOVE:
 783       new_value &= ~reasons;
 784       break;
 785     case DISABLE_REASON_CLEAR:
 786       new_value = Extension::DISABLE_NONE;
 787       break;
 788   }
 789
 790   if (old_value == new_value)  // no change, return.
 791     return;
 792
 793   if (new_value == Extension::DISABLE_NONE) {
 794     UpdateExtensionPref(extension_id, kPrefDisableReasons, NULL);
 795   } else {
 796     UpdateExtensionPref(extension_id,
 797                         kPrefDisableReasons,
 798                         new base::FundamentalValue(new_value));
 799   }
 800
 801   FOR_EACH_OBSERVER(ExtensionPrefsObserver,
 802                     observer_list_,
 803                     OnExtensionDisableReasonsChanged(extension_id, new_value));
 804 }
 805
 806 std::set<std::string> ExtensionPrefs::GetBlacklistedExtensions() {
 807   std::set<std::string> ids;
 808
 809   const base::DictionaryValue* extensions =
 810       prefs_->GetDictionary(pref_names::kExtensions);
 811   if (!extensions)
 812     return ids;
 813
 814   for (base::DictionaryValue::Iterator it(*extensions);
 815        !it.IsAtEnd(); it.Advance()) {
 816     if (!it.value().IsType(base::Value::TYPE_DICTIONARY)) {
 817       NOTREACHED() << "Invalid pref for extension " << it.key();
 818       continue;
 819     }
 820     if (IsBlacklistBitSet(
 821             static_cast<const base::DictionaryValue*>(&it.value()))) {
 822       ids.insert(it.key());
 823     }
 824   }
 825
 826   return ids;
 827 }
 828
 829 void ExtensionPrefs::SetExtensionBlacklisted(const std::string& extension_id,
 830                                              bool is_blacklisted) {
 831   bool currently_blacklisted = IsExtensionBlacklisted(extension_id);
 832   if (is_blacklisted == currently_blacklisted)
 833     return;
 834
 835   // Always make sure the "acknowledged" bit is cleared since the blacklist bit
 836   // is changing.
 837   UpdateExtensionPref(extension_id, kPrefBlacklistAcknowledged, NULL);
 838
 839   if (is_blacklisted) {
 840     UpdateExtensionPref(extension_id,
 841                         kPrefBlacklist,
 842                         new base::FundamentalValue(true));
 843   } else {
 844     UpdateExtensionPref(extension_id, kPrefBlacklist, NULL);
 845     const base::DictionaryValue* dict = GetExtensionPref(extension_id);
 846     if (dict && dict->empty())
 847       DeleteExtensionPrefs(extension_id);
 848   }
 849 }
 850
 851 bool ExtensionPrefs::IsExtensionBlacklisted(const std::string& id) const {
 852   const base::DictionaryValue* ext_prefs = GetExtensionPref(id);
 853   return ext_prefs && IsBlacklistBitSet(ext_prefs);
 854 }
 855
 856 namespace {
 857
 858 // Serializes a 64bit integer as a string value.
 859 void SaveInt64(base::DictionaryValue* dictionary,
 860                const char* key,
 861                const int64 value) {
 862   if (!dictionary)
 863     return;
 864
 865   std::string string_value = base::Int64ToString(value);
 866   dictionary->SetString(key, string_value);
 867 }
 868
 869 // Deserializes a 64bit integer stored as a string value.
 870 bool ReadInt64(const base::DictionaryValue* dictionary,
 871                const char* key,
 872                int64* value) {
 873   if (!dictionary)
 874     return false;
 875
 876   std::string string_value;
 877   if (!dictionary->GetString(key, &string_value))
 878     return false;
 879
 880   return base::StringToInt64(string_value, value);
 881 }
 882
 883 // Serializes |time| as a string value mapped to |key| in |dictionary|.
 884 void SaveTime(base::DictionaryValue* dictionary,
 885               const char* key,
 886               const base::Time& time) {
 887   SaveInt64(dictionary, key, time.ToInternalValue());
 888 }
 889
 890 // The opposite of SaveTime. If |key| is not found, this returns an empty Time
 891 // (is_null() will return true).
 892 base::Time ReadTime(const base::DictionaryValue* dictionary, const char* key) {
 893   int64 value;
 894   if (ReadInt64(dictionary, key, &value))
 895     return base::Time::FromInternalValue(value);
 896
 897   return base::Time();
 898 }
 899
 900 }  // namespace
 901
 902 base::Time ExtensionPrefs::LastPingDay(const std::string& extension_id) const {
 903   DCHECK(crx_file::id_util::IdIsValid(extension_id));
 904   return ReadTime(GetExtensionPref(extension_id), kLastPingDay);
 905 }
 906
 907 void ExtensionPrefs::SetLastPingDay(const std::string& extension_id,
 908                                     const base::Time& time) {
 909   DCHECK(crx_file::id_util::IdIsValid(extension_id));
 910   ScopedExtensionPrefUpdate update(prefs_, extension_id);
 911   SaveTime(update.Get(), kLastPingDay, time);
 912 }
 913
 914 base::Time ExtensionPrefs::BlacklistLastPingDay() const {
 915   return ReadTime(prefs_->GetDictionary(kExtensionsBlacklistUpdate),
 916                   kLastPingDay);
 917 }
 918
 919 void ExtensionPrefs::SetBlacklistLastPingDay(const base::Time& time) {
 920   DictionaryPrefUpdate update(prefs_, kExtensionsBlacklistUpdate);
 921   SaveTime(update.Get(), kLastPingDay, time);
 922 }
 923
 924 base::Time ExtensionPrefs::LastActivePingDay(const std::string& extension_id) {
 925   DCHECK(crx_file::id_util::IdIsValid(extension_id));
 926   return ReadTime(GetExtensionPref(extension_id), kLastActivePingDay);
 927 }
 928
 929 void ExtensionPrefs::SetLastActivePingDay(const std::string& extension_id,
 930                                           const base::Time& time) {
 931   DCHECK(crx_file::id_util::IdIsValid(extension_id));
 932   ScopedExtensionPrefUpdate update(prefs_, extension_id);
 933   SaveTime(update.Get(), kLastActivePingDay, time);
 934 }
 935
 936 bool ExtensionPrefs::GetActiveBit(const std::string& extension_id) {
 937   const base::DictionaryValue* dictionary = GetExtensionPref(extension_id);
 938   bool result = false;
 939   if (dictionary && dictionary->GetBoolean(kActiveBit, &result))
 940     return result;
 941   return false;
 942 }
 943
 944 void ExtensionPrefs::SetActiveBit(const std::string& extension_id,
 945                                   bool active) {
 946   UpdateExtensionPref(extension_id, kActiveBit,
 947                       new base::FundamentalValue(active));
 948 }
 949
 950 void ExtensionPrefs::MigratePermissions(const ExtensionIdList& extension_ids) {
 951   PermissionsInfo* info = PermissionsInfo::GetInstance();
 952   for (ExtensionIdList::const_iterator ext_id =
 953        extension_ids.begin(); ext_id != extension_ids.end(); ++ext_id) {
 954     // An extension's granted permissions need to be migrated if the
 955     // full_access bit is present. This bit was always present in the previous
 956     // scheme and is never present now.
 957     bool full_access = false;
 958     const base::DictionaryValue* ext = GetExtensionPref(*ext_id);
 959     if (!ext || !ext->GetBoolean(kPrefOldGrantedFullAccess, &full_access))
 960       continue;
 961
 962     // Remove the full access bit (empty list will get trimmed).
 963     UpdateExtensionPref(
 964         *ext_id, kPrefOldGrantedFullAccess, new base::ListValue());
 965
 966     // Add the plugin permission if the full access bit was set.
 967     if (full_access) {
 968       const base::ListValue* apis = NULL;
 969       base::ListValue* new_apis = NULL;
 970
 971       std::string granted_apis = JoinPrefs(kPrefGrantedPermissions, kPrefAPIs);
 972       if (ext->GetList(kPrefOldGrantedAPIs, &apis))
 973         new_apis = apis->DeepCopy();
 974       else
 975         new_apis = new base::ListValue();
 976
 977       std::string plugin_name = info->GetByID(APIPermission::kPlugin)->name();
 978       new_apis->Append(new base::StringValue(plugin_name));
 979       UpdateExtensionPref(*ext_id, granted_apis, new_apis);
 980     }
 981
 982     // The granted permissions originally only held the effective hosts,
 983     // which are a combination of host and user script host permissions.
 984     // We now maintain these lists separately. For migration purposes, it
 985     // does not matter how we treat the old effective hosts as long as the
 986     // new effective hosts will be the same, so we move them to explicit
 987     // host permissions.
 988     const base::ListValue* hosts = NULL;
 989     std::string explicit_hosts =
 990         JoinPrefs(kPrefGrantedPermissions, kPrefExplicitHosts);
 991     if (ext->GetList(kPrefOldGrantedHosts, &hosts)) {
 992       UpdateExtensionPref(
 993           *ext_id, explicit_hosts, hosts->DeepCopy());
 994
 995       // We can get rid of the old one by setting it to an empty list.
 996       UpdateExtensionPref(*ext_id, kPrefOldGrantedHosts, new base::ListValue());
 997     }
 998   }
 999 }
1000
1001 void ExtensionPrefs::MigrateDisableReasons(
1002     const ExtensionIdList& extension_ids) {
1003   for (ExtensionIdList::const_iterator ext_id =
1004        extension_ids.begin(); ext_id != extension_ids.end(); ++ext_id) {
1005     int value = -1;
1006     if (ReadPrefAsInteger(*ext_id, kDeprecatedPrefDisableReason, &value)) {
1007       int new_value = Extension::DISABLE_NONE;
1008       switch (value) {
1009         case Extension::DEPRECATED_DISABLE_USER_ACTION:
1010           new_value = Extension::DISABLE_USER_ACTION;
1011           break;
1012         case Extension::DEPRECATED_DISABLE_PERMISSIONS_INCREASE:
1013           new_value = Extension::DISABLE_PERMISSIONS_INCREASE;
1014           break;
1015         case Extension::DEPRECATED_DISABLE_RELOAD:
1016           new_value = Extension::DISABLE_RELOAD;
1017           break;
1018       }
1019
1020       UpdateExtensionPref(*ext_id, kPrefDisableReasons,
1021                           new base::FundamentalValue(new_value));
1022       // Remove the old disable reason.
1023       UpdateExtensionPref(*ext_id, kDeprecatedPrefDisableReason, NULL);
1024     }
1025   }
1026 }
1027
1028 PermissionSet* ExtensionPrefs::GetGrantedPermissions(
1029     const std::string& extension_id) {
1030   CHECK(crx_file::id_util::IdIsValid(extension_id));
1031   return ReadPrefAsPermissionSet(extension_id, kPrefGrantedPermissions);
1032 }
1033
1034 void ExtensionPrefs::AddGrantedPermissions(
1035     const std::string& extension_id,
1036     const PermissionSet* permissions) {
1037   CHECK(crx_file::id_util::IdIsValid(extension_id));
1038
1039   scoped_refptr<PermissionSet> granted_permissions(
1040       GetGrantedPermissions(extension_id));
1041
1042   // The new granted permissions are the union of the already granted
1043   // permissions and the newly granted permissions.
1044   scoped_refptr<PermissionSet> new_perms(
1045       PermissionSet::CreateUnion(
1046           permissions, granted_permissions.get()));
1047
1048   SetExtensionPrefPermissionSet(
1049       extension_id, kPrefGrantedPermissions, new_perms.get());
1050 }
1051
1052 void ExtensionPrefs::RemoveGrantedPermissions(
1053     const std::string& extension_id,
1054     const PermissionSet* permissions) {
1055   CHECK(crx_file::id_util::IdIsValid(extension_id));
1056
1057   scoped_refptr<PermissionSet> granted_permissions(
1058       GetGrantedPermissions(extension_id));
1059
1060   // The new granted permissions are the difference of the already granted
1061   // permissions and the newly ungranted permissions.
1062   scoped_refptr<PermissionSet> new_perms(
1063       PermissionSet::CreateDifference(
1064           granted_permissions.get(), permissions));
1065
1066   SetExtensionPrefPermissionSet(
1067       extension_id, kPrefGrantedPermissions, new_perms.get());
1068 }
1069
1070 PermissionSet* ExtensionPrefs::GetActivePermissions(
1071     const std::string& extension_id) {
1072   CHECK(crx_file::id_util::IdIsValid(extension_id));
1073   return ReadPrefAsPermissionSet(extension_id, kPrefActivePermissions);
1074 }
1075
1076 void ExtensionPrefs::SetActivePermissions(
1077     const std::string& extension_id,
1078     const PermissionSet* permissions) {
1079   SetExtensionPrefPermissionSet(
1080       extension_id, kPrefActivePermissions, permissions);
1081 }
1082
1083 void ExtensionPrefs::SetExtensionRunning(const std::string& extension_id,
1084     bool is_running) {
1085   base::Value* value = new base::FundamentalValue(is_running);
1086   UpdateExtensionPref(extension_id, kPrefRunning, value);
1087 }
1088
1089 bool ExtensionPrefs::IsExtensionRunning(const std::string& extension_id) {
1090   const base::DictionaryValue* extension = GetExtensionPref(extension_id);
1091   if (!extension)
1092     return false;
1093   bool running = false;
1094   extension->GetBoolean(kPrefRunning, &running);
1095   return running;
1096 }
1097
1098 void ExtensionPrefs::SetIsActive(const std::string& extension_id,
1099                                  bool is_active) {
1100   base::Value* value = new base::FundamentalValue(is_active);
1101   UpdateExtensionPref(extension_id, kIsActive, value);
1102 }
1103
1104 bool ExtensionPrefs::IsActive(const std::string& extension_id) {
1105   const base::DictionaryValue* extension = GetExtensionPref(extension_id);
1106   if (!extension)
1107     return false;
1108   bool is_active = false;
1109   extension->GetBoolean(kIsActive, &is_active);
1110   return is_active;
1111 }
1112
1113 bool ExtensionPrefs::IsIncognitoEnabled(const std::string& extension_id) const {
1114   return ReadPrefAsBooleanAndReturn(extension_id, kPrefIncognitoEnabled);
1115 }
1116
1117 void ExtensionPrefs::SetIsIncognitoEnabled(const std::string& extension_id,
1118                                            bool enabled) {
1119   UpdateExtensionPref(extension_id, kPrefIncognitoEnabled,
1120                       new base::FundamentalValue(enabled));
1121   extension_pref_value_map_->SetExtensionIncognitoState(extension_id, enabled);
1122 }
1123
1124 bool ExtensionPrefs::AllowFileAccess(const std::string& extension_id) const {
1125   return ReadPrefAsBooleanAndReturn(extension_id, kPrefAllowFileAccess);
1126 }
1127
1128 void ExtensionPrefs::SetAllowFileAccess(const std::string& extension_id,
1129                                         bool allow) {
1130   UpdateExtensionPref(extension_id, kPrefAllowFileAccess,
1131                       new base::FundamentalValue(allow));
1132 }
1133
1134 bool ExtensionPrefs::HasAllowFileAccessSetting(
1135     const std::string& extension_id) const {
1136   const base::DictionaryValue* ext = GetExtensionPref(extension_id);
1137   return ext && ext->HasKey(kPrefAllowFileAccess);
1138 }
1139
1140 bool ExtensionPrefs::DoesExtensionHaveState(
1141     const std::string& id, Extension::State check_state) const {
1142   const base::DictionaryValue* extension = GetExtensionPref(id);
1143   int state = -1;
1144   if (!extension || !extension->GetInteger(kPrefState, &state))
1145     return false;
1146
1147   if (state < 0 || state >= Extension::NUM_STATES) {
1148     LOG(ERROR) << "Bad pref 'state' for extension '" << id << "'";
1149     return false;
1150   }
1151
1152   return state == check_state;
1153 }
1154
1155 bool ExtensionPrefs::IsExternalExtensionUninstalled(
1156     const std::string& id) const {
1157   return DoesExtensionHaveState(id, Extension::EXTERNAL_EXTENSION_UNINSTALLED);
1158 }
1159
1160 bool ExtensionPrefs::IsExtensionDisabled(
1161     const std::string& id) const {
1162   return DoesExtensionHaveState(id, Extension::DISABLED);
1163 }
1164
1165 ExtensionIdList ExtensionPrefs::GetToolbarOrder() {
1166   ExtensionIdList id_list_out;
1167   GetUserExtensionPrefIntoContainer(pref_names::kToolbar, &id_list_out);
1168   return id_list_out;
1169 }
1170
1171 void ExtensionPrefs::SetToolbarOrder(const ExtensionIdList& extension_ids) {
1172   SetExtensionPrefFromContainer(pref_names::kToolbar, extension_ids);
1173 }
1174
1175 void ExtensionPrefs::OnExtensionInstalled(
1176     const Extension* extension,
1177     Extension::State initial_state,
1178     const syncer::StringOrdinal& page_ordinal,
1179     int install_flags,
1180     const std::string& install_parameter) {
1181   ScopedExtensionPrefUpdate update(prefs_, extension->id());
1182   base::DictionaryValue* extension_dict = update.Get();
1183   const base::Time install_time = time_provider_->GetCurrentTime();
1184   PopulateExtensionInfoPrefs(extension,
1185                              install_time,
1186                              initial_state,
1187                              install_flags,
1188                              install_parameter,
1189                              extension_dict);
1190
1191   bool requires_sort_ordinal = extension->RequiresSortOrdinal() &&
1192                                (install_flags & kInstallFlagIsEphemeral) == 0;
1193   FinishExtensionInfoPrefs(extension->id(),
1194                            install_time,
1195                            requires_sort_ordinal,
1196                            page_ordinal,
1197                            extension_dict);
1198 }
1199
1200 void ExtensionPrefs::OnExtensionUninstalled(const std::string& extension_id,
1201                                             const Manifest::Location& location,
1202                                             bool external_uninstall) {
1203   app_sorting_->ClearOrdinals(extension_id);
1204
1205   // For external extensions, we save a preference reminding ourself not to try
1206   // and install the extension anymore (except when |external_uninstall| is
1207   // true, which signifies that the registry key was deleted or the pref file
1208   // no longer lists the extension).
1209   if (!external_uninstall && Manifest::IsExternalLocation(location)) {
1210     UpdateExtensionPref(extension_id, kPrefState,
1211                         new base::FundamentalValue(
1212                             Extension::EXTERNAL_EXTENSION_UNINSTALLED));
1213     extension_pref_value_map_->SetExtensionState(extension_id, false);
1214     FOR_EACH_OBSERVER(ExtensionPrefsObserver,
1215                       observer_list_,
1216                       OnExtensionStateChanged(extension_id, false));
1217   } else {
1218     DeleteExtensionPrefs(extension_id);
1219   }
1220 }
1221
1222 void ExtensionPrefs::SetExtensionState(const std::string& extension_id,
1223                                        Extension::State state) {
1224   UpdateExtensionPref(extension_id, kPrefState,
1225                       new base::FundamentalValue(state));
1226   bool enabled = (state == Extension::ENABLED);
1227   extension_pref_value_map_->SetExtensionState(extension_id, enabled);
1228   FOR_EACH_OBSERVER(ExtensionPrefsObserver,
1229                     observer_list_,
1230                     OnExtensionStateChanged(extension_id, enabled));
1231 }
1232
1233 void ExtensionPrefs::SetExtensionBlacklistState(const std::string& extension_id,
1234                                                 BlacklistState state) {
1235   SetExtensionBlacklisted(extension_id, state == BLACKLISTED_MALWARE);
1236   UpdateExtensionPref(extension_id, kPrefBlacklistState,
1237                       new base::FundamentalValue(state));
1238 }
1239
1240 BlacklistState ExtensionPrefs::GetExtensionBlacklistState(
1241     const std::string& extension_id) {
1242   if (IsExtensionBlacklisted(extension_id))
1243     return BLACKLISTED_MALWARE;
1244   const base::DictionaryValue* ext_prefs = GetExtensionPref(extension_id);
1245   int int_value = 0;
1246   if (ext_prefs && ext_prefs->GetInteger(kPrefBlacklistState, &int_value))
1247     return static_cast<BlacklistState>(int_value);
1248
1249   return NOT_BLACKLISTED;
1250 }
1251
1252 std::string ExtensionPrefs::GetVersionString(const std::string& extension_id) {
1253   const base::DictionaryValue* extension = GetExtensionPref(extension_id);
1254   if (!extension)
1255     return std::string();
1256
1257   std::string version;
1258   extension->GetString(kPrefVersion, &version);
1259
1260   return version;
1261 }
1262
1263 void ExtensionPrefs::UpdateManifest(const Extension* extension) {
1264   if (!Manifest::IsUnpackedLocation(extension->location())) {
1265     const base::DictionaryValue* extension_dict =
1266         GetExtensionPref(extension->id());
1267     if (!extension_dict)
1268       return;
1269     const base::DictionaryValue* old_manifest = NULL;
1270     bool update_required =
1271         !extension_dict->GetDictionary(kPrefManifest, &old_manifest) ||
1272         !extension->manifest()->value()->Equals(old_manifest);
1273     if (update_required) {
1274       UpdateExtensionPref(extension->id(), kPrefManifest,
1275                           extension->manifest()->value()->DeepCopy());
1276     }
1277   }
1278 }
1279
1280 scoped_ptr<ExtensionInfo> ExtensionPrefs::GetInstalledInfoHelper(
1281     const std::string& extension_id,
1282     const base::DictionaryValue* extension) const {
1283   int location_value;
1284   if (!extension->GetInteger(kPrefLocation, &location_value))
1285     return scoped_ptr<ExtensionInfo>();
1286
1287   Manifest::Location location = static_cast<Manifest::Location>(location_value);
1288   if (location == Manifest::COMPONENT) {
1289     // Component extensions are ignored. Component extensions may have data
1290     // saved in preferences, but they are already loaded at this point (by
1291     // ComponentLoader) and shouldn't be populated into the result of
1292     // GetInstalledExtensionsInfo, otherwise InstalledLoader would also want to
1293     // load them.
1294     return scoped_ptr<ExtensionInfo>();
1295   }
1296
1297   // Only the following extension types have data saved in the preferences.
1298   if (location != Manifest::INTERNAL &&
1299       !Manifest::IsUnpackedLocation(location) &&
1300       !Manifest::IsExternalLocation(location)) {
1301     NOTREACHED();
1302     return scoped_ptr<ExtensionInfo>();
1303   }
1304
1305   const base::DictionaryValue* manifest = NULL;
1306   if (!Manifest::IsUnpackedLocation(location) &&
1307       !extension->GetDictionary(kPrefManifest, &manifest)) {
1308     LOG(WARNING) << "Missing manifest for extension " << extension_id;
1309     // Just a warning for now.
1310   }
1311
1312   base::FilePath::StringType path;
1313   if (!extension->GetString(kPrefPath, &path))
1314     return scoped_ptr<ExtensionInfo>();
1315
1316   // Make path absolute. Most (but not all) extension types have relative paths.
1317   if (!base::FilePath(path).IsAbsolute())
1318     path = install_directory_.Append(path).value();
1319
1320   return scoped_ptr<ExtensionInfo>(new ExtensionInfo(
1321       manifest, extension_id, base::FilePath(path), location));
1322 }
1323
1324 scoped_ptr<ExtensionInfo> ExtensionPrefs::GetInstalledExtensionInfo(
1325     const std::string& extension_id) const {
1326   const base::DictionaryValue* ext = NULL;
1327   const base::DictionaryValue* extensions =
1328       prefs_->GetDictionary(pref_names::kExtensions);
1329   if (!extensions ||
1330       !extensions->GetDictionaryWithoutPathExpansion(extension_id, &ext))
1331     return scoped_ptr<ExtensionInfo>();
1332   int state_value;
1333   if (ext->GetInteger(kPrefState, &state_value) &&
1334       state_value == Extension::EXTERNAL_EXTENSION_UNINSTALLED) {
1335     LOG(WARNING) << "External extension with id " << extension_id
1336                  << " has been uninstalled by the user";
1337     return scoped_ptr<ExtensionInfo>();
1338   }
1339
1340   return GetInstalledInfoHelper(extension_id, ext);
1341 }
1342
1343 scoped_ptr<ExtensionPrefs::ExtensionsInfo>
1344 ExtensionPrefs::GetInstalledExtensionsInfo() const {
1345   scoped_ptr<ExtensionsInfo> extensions_info(new ExtensionsInfo);
1346
1347   const base::DictionaryValue* extensions =
1348       prefs_->GetDictionary(pref_names::kExtensions);
1349   for (base::DictionaryValue::Iterator extension_id(*extensions);
1350        !extension_id.IsAtEnd(); extension_id.Advance()) {
1351     if (!crx_file::id_util::IdIsValid(extension_id.key()))
1352       continue;
1353
1354     scoped_ptr<ExtensionInfo> info =
1355         GetInstalledExtensionInfo(extension_id.key());
1356     if (info)
1357       extensions_info->push_back(linked_ptr<ExtensionInfo>(info.release()));
1358   }
1359
1360   return extensions_info.Pass();
1361 }
1362
1363 scoped_ptr<ExtensionPrefs::ExtensionsInfo>
1364 ExtensionPrefs::GetUninstalledExtensionsInfo() const {
1365   scoped_ptr<ExtensionsInfo> extensions_info(new ExtensionsInfo);
1366
1367   const base::DictionaryValue* extensions =
1368       prefs_->GetDictionary(pref_names::kExtensions);
1369   for (base::DictionaryValue::Iterator extension_id(*extensions);
1370        !extension_id.IsAtEnd(); extension_id.Advance()) {
1371     const base::DictionaryValue* ext = NULL;
1372     if (!crx_file::id_util::IdIsValid(extension_id.key()) ||
1373         !IsExternalExtensionUninstalled(extension_id.key()) ||
1374         !extension_id.value().GetAsDictionary(&ext))
1375       continue;
1376
1377     scoped_ptr<ExtensionInfo> info =
1378         GetInstalledInfoHelper(extension_id.key(), ext);
1379     if (info)
1380       extensions_info->push_back(linked_ptr<ExtensionInfo>(info.release()));
1381   }
1382
1383   return extensions_info.Pass();
1384 }
1385
1386 void ExtensionPrefs::SetDelayedInstallInfo(
1387     const Extension* extension,
1388     Extension::State initial_state,
1389     int install_flags,
1390     DelayReason delay_reason,
1391     const syncer::StringOrdinal& page_ordinal,
1392     const std::string& install_parameter) {
1393   base::DictionaryValue* extension_dict = new base::DictionaryValue();
1394   PopulateExtensionInfoPrefs(extension,
1395                              time_provider_->GetCurrentTime(),
1396                              initial_state,
1397                              install_flags,
1398                              install_parameter,
1399                              extension_dict);
1400
1401   // Add transient data that is needed by FinishDelayedInstallInfo(), but
1402   // should not be in the final extension prefs. All entries here should have
1403   // a corresponding Remove() call in FinishDelayedInstallInfo().
1404   if (extension->RequiresSortOrdinal() &&
1405       (install_flags & kInstallFlagIsEphemeral) == 0) {
1406     extension_dict->SetString(
1407         kPrefSuggestedPageOrdinal,
1408         page_ordinal.IsValid() ? page_ordinal.ToInternalValue()
1409                                : std::string());
1410   }
1411   extension_dict->SetInteger(kDelayedInstallReason,
1412                              static_cast<int>(delay_reason));
1413
1414   UpdateExtensionPref(extension->id(), kDelayedInstallInfo, extension_dict);
1415 }
1416
1417 bool ExtensionPrefs::RemoveDelayedInstallInfo(
1418     const std::string& extension_id) {
1419   if (!GetExtensionPref(extension_id))
1420     return false;
1421   ScopedExtensionPrefUpdate update(prefs_, extension_id);
1422   bool result = update->Remove(kDelayedInstallInfo, NULL);
1423   return result;
1424 }
1425
1426 bool ExtensionPrefs::FinishDelayedInstallInfo(
1427     const std::string& extension_id) {
1428   CHECK(crx_file::id_util::IdIsValid(extension_id));
1429   ScopedExtensionPrefUpdate update(prefs_, extension_id);
1430   base::DictionaryValue* extension_dict = update.Get();
1431   base::DictionaryValue* pending_install_dict = NULL;
1432   if (!extension_dict->GetDictionary(kDelayedInstallInfo,
1433                                      &pending_install_dict)) {
1434     return false;
1435   }
1436
1437   // Retrieve and clear transient values populated by SetDelayedInstallInfo().
1438   // Also do any other data cleanup that makes sense.
1439   std::string serialized_ordinal;
1440   syncer::StringOrdinal suggested_page_ordinal;
1441   bool needs_sort_ordinal = false;
1442   if (pending_install_dict->GetString(kPrefSuggestedPageOrdinal,
1443                                       &serialized_ordinal)) {
1444     suggested_page_ordinal = syncer::StringOrdinal(serialized_ordinal);
1445     needs_sort_ordinal = true;
1446     pending_install_dict->Remove(kPrefSuggestedPageOrdinal, NULL);
1447   }
1448   pending_install_dict->Remove(kDelayedInstallReason, NULL);
1449
1450   const base::Time install_time = time_provider_->GetCurrentTime();
1451   pending_install_dict->Set(
1452       kPrefInstallTime,
1453       new base::StringValue(
1454           base::Int64ToString(install_time.ToInternalValue())));
1455
1456   // Some extension pref values are written conditionally. If they are not
1457   // present in the delayed install data, they should be removed when the
1458   // delayed install is committed.
1459   extension_dict->Remove(kPrefEphemeralApp, NULL);
1460
1461   // Commit the delayed install data.
1462   for (base::DictionaryValue::Iterator it(*pending_install_dict); !it.IsAtEnd();
1463        it.Advance()) {
1464     extension_dict->Set(it.key(), it.value().DeepCopy());
1465   }
1466   FinishExtensionInfoPrefs(extension_id, install_time, needs_sort_ordinal,
1467                            suggested_page_ordinal, extension_dict);
1468   return true;
1469 }
1470
1471 scoped_ptr<ExtensionInfo> ExtensionPrefs::GetDelayedInstallInfo(
1472     const std::string& extension_id) const {
1473   const base::DictionaryValue* extension_prefs =
1474       GetExtensionPref(extension_id);
1475   if (!extension_prefs)
1476     return scoped_ptr<ExtensionInfo>();
1477
1478   const base::DictionaryValue* ext = NULL;
1479   if (!extension_prefs->GetDictionary(kDelayedInstallInfo, &ext))
1480     return scoped_ptr<ExtensionInfo>();
1481
1482   return GetInstalledInfoHelper(extension_id, ext);
1483 }
1484
1485 ExtensionPrefs::DelayReason ExtensionPrefs::GetDelayedInstallReason(
1486     const std::string& extension_id) const {
1487   const base::DictionaryValue* extension_prefs =
1488       GetExtensionPref(extension_id);
1489   if (!extension_prefs)
1490     return DELAY_REASON_NONE;
1491
1492   const base::DictionaryValue* ext = NULL;
1493   if (!extension_prefs->GetDictionary(kDelayedInstallInfo, &ext))
1494     return DELAY_REASON_NONE;
1495
1496   int delay_reason;
1497   if (!ext->GetInteger(kDelayedInstallReason, &delay_reason))
1498     return DELAY_REASON_NONE;
1499
1500   return static_cast<DelayReason>(delay_reason);
1501 }
1502
1503 scoped_ptr<ExtensionPrefs::ExtensionsInfo> ExtensionPrefs::
1504     GetAllDelayedInstallInfo() const {
1505   scoped_ptr<ExtensionsInfo> extensions_info(new ExtensionsInfo);
1506
1507   const base::DictionaryValue* extensions =
1508       prefs_->GetDictionary(pref_names::kExtensions);
1509   for (base::DictionaryValue::Iterator extension_id(*extensions);
1510        !extension_id.IsAtEnd(); extension_id.Advance()) {
1511     if (!crx_file::id_util::IdIsValid(extension_id.key()))
1512       continue;
1513
1514     scoped_ptr<ExtensionInfo> info = GetDelayedInstallInfo(extension_id.key());
1515     if (info)
1516       extensions_info->push_back(linked_ptr<ExtensionInfo>(info.release()));
1517   }
1518
1519   return extensions_info.Pass();
1520 }
1521
1522 bool ExtensionPrefs::IsEphemeralApp(const std::string& extension_id) const {
1523   if (ReadPrefAsBooleanAndReturn(extension_id, kPrefEphemeralApp))
1524     return true;
1525
1526   // Ephemerality was previously stored in the creation flags, so we must also
1527   // check it for backcompatibility.
1528   return (GetCreationFlags(extension_id) & Extension::IS_EPHEMERAL) != 0;
1529 }
1530
1531 void ExtensionPrefs::OnEphemeralAppPromoted(const std::string& extension_id) {
1532   DCHECK(IsEphemeralApp(extension_id));
1533
1534   UpdateExtensionPref(extension_id, kPrefEphemeralApp, NULL);
1535
1536   // Ephemerality was previously stored in the creation flags, so ensure the bit
1537   // is cleared.
1538   int creation_flags = Extension::NO_FLAGS;
1539   if (ReadPrefAsInteger(extension_id, kPrefCreationFlags, &creation_flags)) {
1540     if (creation_flags & Extension::IS_EPHEMERAL) {
1541       creation_flags &= ~static_cast<int>(Extension::IS_EPHEMERAL);
1542       UpdateExtensionPref(extension_id,
1543                           kPrefCreationFlags,
1544                           new base::FundamentalValue(creation_flags));
1545     }
1546   }
1547 }
1548
1549 bool ExtensionPrefs::WasAppDraggedByUser(const std::string& extension_id) {
1550   return ReadPrefAsBooleanAndReturn(extension_id, kPrefUserDraggedApp);
1551 }
1552
1553 void ExtensionPrefs::SetAppDraggedByUser(const std::string& extension_id) {
1554   UpdateExtensionPref(extension_id, kPrefUserDraggedApp,
1555                       new base::FundamentalValue(true));
1556 }
1557
1558 bool ExtensionPrefs::IsFromWebStore(
1559     const std::string& extension_id) const {
1560   const base::DictionaryValue* dictionary = GetExtensionPref(extension_id);
1561   bool result = false;
1562   if (dictionary && dictionary->GetBoolean(kPrefFromWebStore, &result))
1563     return result;
1564   return false;
1565 }
1566
1567 bool ExtensionPrefs::IsFromBookmark(
1568     const std::string& extension_id) const {
1569   const base::DictionaryValue* dictionary = GetExtensionPref(extension_id);
1570   bool result = false;
1571   if (dictionary && dictionary->GetBoolean(kPrefFromBookmark, &result))
1572     return result;
1573   return false;
1574 }
1575
1576 int ExtensionPrefs::GetCreationFlags(const std::string& extension_id) const {
1577   int creation_flags = Extension::NO_FLAGS;
1578   if (!ReadPrefAsInteger(extension_id, kPrefCreationFlags, &creation_flags)) {
1579     // Since kPrefCreationFlags was added later, it will be missing for
1580     // previously installed extensions.
1581     if (IsFromBookmark(extension_id))
1582       creation_flags |= Extension::FROM_BOOKMARK;
1583     if (IsFromWebStore(extension_id))
1584       creation_flags |= Extension::FROM_WEBSTORE;
1585     if (WasInstalledByDefault(extension_id))
1586       creation_flags |= Extension::WAS_INSTALLED_BY_DEFAULT;
1587     if (WasInstalledByOem(extension_id))
1588       creation_flags |= Extension::WAS_INSTALLED_BY_OEM;
1589   }
1590   return creation_flags;
1591 }
1592
1593 int ExtensionPrefs::GetDelayedInstallCreationFlags(
1594     const std::string& extension_id) const {
1595   int creation_flags = Extension::NO_FLAGS;
1596   const base::DictionaryValue* delayed_info = NULL;
1597   if (ReadPrefAsDictionary(extension_id, kDelayedInstallInfo, &delayed_info)) {
1598     delayed_info->GetInteger(kPrefCreationFlags, &creation_flags);
1599   }
1600   return creation_flags;
1601 }
1602
1603 bool ExtensionPrefs::WasInstalledByDefault(
1604     const std::string& extension_id) const {
1605   const base::DictionaryValue* dictionary = GetExtensionPref(extension_id);
1606   bool result = false;
1607   if (dictionary &&
1608       dictionary->GetBoolean(kPrefWasInstalledByDefault, &result))
1609     return result;
1610   return false;
1611 }
1612
1613 bool ExtensionPrefs::WasInstalledByOem(const std::string& extension_id) const {
1614   const base::DictionaryValue* dictionary = GetExtensionPref(extension_id);
1615   bool result = false;
1616   if (dictionary && dictionary->GetBoolean(kPrefWasInstalledByOem, &result))
1617     return result;
1618   return false;
1619 }
1620
1621 base::Time ExtensionPrefs::GetInstallTime(
1622     const std::string& extension_id) const {
1623   const base::DictionaryValue* extension = GetExtensionPref(extension_id);
1624   if (!extension) {
1625     NOTREACHED();
1626     return base::Time();
1627   }
1628   std::string install_time_str;
1629   if (!extension->GetString(kPrefInstallTime, &install_time_str))
1630     return base::Time();
1631   int64 install_time_i64 = 0;
1632   if (!base::StringToInt64(install_time_str, &install_time_i64))
1633     return base::Time();
1634   return base::Time::FromInternalValue(install_time_i64);
1635 }
1636
1637 bool ExtensionPrefs::DoNotSync(const std::string& extension_id) const {
1638   bool do_not_sync;
1639   if (!ReadPrefAsBoolean(extension_id, kPrefDoNotSync, &do_not_sync))
1640     return false;
1641
1642   return do_not_sync;
1643 }
1644
1645 base::Time ExtensionPrefs::GetLastLaunchTime(
1646     const std::string& extension_id) const {
1647   const base::DictionaryValue* extension = GetExtensionPref(extension_id);
1648   if (!extension)
1649     return base::Time();
1650
1651   std::string launch_time_str;
1652   if (!extension->GetString(kPrefLastLaunchTime, &launch_time_str))
1653     return base::Time();
1654   int64 launch_time_i64 = 0;
1655   if (!base::StringToInt64(launch_time_str, &launch_time_i64))
1656     return base::Time();
1657   return base::Time::FromInternalValue(launch_time_i64);
1658 }
1659
1660 void ExtensionPrefs::SetLastLaunchTime(const std::string& extension_id,
1661                                        const base::Time& time) {
1662   DCHECK(crx_file::id_util::IdIsValid(extension_id));
1663   ScopedExtensionPrefUpdate update(prefs_, extension_id);
1664   SaveTime(update.Get(), kPrefLastLaunchTime, time);
1665 }
1666
1667 void ExtensionPrefs::ClearLastLaunchTimes() {
1668   const base::DictionaryValue* dict =
1669       prefs_->GetDictionary(pref_names::kExtensions);
1670   if (!dict || dict->empty())
1671     return;
1672
1673   // Collect all the keys to remove the last launched preference from.
1674   DictionaryPrefUpdate update(prefs_, pref_names::kExtensions);
1675   base::DictionaryValue* update_dict = update.Get();
1676   for (base::DictionaryValue::Iterator i(*update_dict); !i.IsAtEnd();
1677        i.Advance()) {
1678     base::DictionaryValue* extension_dict = NULL;
1679     if (!update_dict->GetDictionary(i.key(), &extension_dict))
1680       continue;
1681
1682     if (extension_dict->HasKey(kPrefLastLaunchTime))
1683       extension_dict->Remove(kPrefLastLaunchTime, NULL);
1684   }
1685 }
1686
1687 void ExtensionPrefs::GetExtensions(ExtensionIdList* out) {
1688   CHECK(out);
1689
1690   scoped_ptr<ExtensionsInfo> extensions_info(GetInstalledExtensionsInfo());
1691
1692   for (size_t i = 0; i < extensions_info->size(); ++i) {
1693     ExtensionInfo* info = extensions_info->at(i).get();
1694     out->push_back(info->extension_id);
1695   }
1696 }
1697
1698 // static
1699 ExtensionIdList ExtensionPrefs::GetExtensionsFrom(
1700     const PrefService* pref_service) {
1701   ExtensionIdList result;
1702
1703   const base::DictionaryValue* extension_prefs = NULL;
1704   const base::Value* extension_prefs_value =
1705       pref_service->GetUserPrefValue(pref_names::kExtensions);
1706   if (!extension_prefs_value ||
1707       !extension_prefs_value->GetAsDictionary(&extension_prefs)) {
1708     return result;  // Empty set
1709   }
1710
1711   for (base::DictionaryValue::Iterator it(*extension_prefs); !it.IsAtEnd();
1712        it.Advance()) {
1713     const base::DictionaryValue* ext = NULL;
1714     if (!it.value().GetAsDictionary(&ext)) {
1715       NOTREACHED() << "Invalid pref for extension " << it.key();
1716       continue;
1717     }
1718     if (!IsBlacklistBitSet(ext))
1719       result.push_back(it.key());
1720   }
1721   return result;
1722 }
1723
1724 void ExtensionPrefs::AddObserver(ExtensionPrefsObserver* observer) {
1725   observer_list_.AddObserver(observer);
1726 }
1727
1728 void ExtensionPrefs::RemoveObserver(ExtensionPrefsObserver* observer) {
1729   observer_list_.RemoveObserver(observer);
1730 }
1731
1732 void ExtensionPrefs::FixMissingPrefs(const ExtensionIdList& extension_ids) {
1733   // Fix old entries that did not get an installation time entry when they
1734   // were installed or don't have a preferences field.
1735   for (ExtensionIdList::const_iterator ext_id = extension_ids.begin();
1736        ext_id != extension_ids.end(); ++ext_id) {
1737     if (GetInstallTime(*ext_id) == base::Time()) {
1738       VLOG(1) << "Could not parse installation time of extension "
1739               << *ext_id << ". It was probably installed before setting "
1740               << kPrefInstallTime << " was introduced. Updating "
1741               << kPrefInstallTime << " to the current time.";
1742       const base::Time install_time = time_provider_->GetCurrentTime();
1743       UpdateExtensionPref(*ext_id,
1744                           kPrefInstallTime,
1745                           new base::StringValue(base::Int64ToString(
1746                               install_time.ToInternalValue())));
1747     }
1748   }
1749 }
1750
1751 void ExtensionPrefs::InitPrefStore() {
1752   TRACE_EVENT0("browser,startup", "ExtensionPrefs::InitPrefStore")
1753   SCOPED_UMA_HISTOGRAM_TIMER("Extensions.InitPrefStoreTime");
1754
1755   if (extensions_disabled_) {
1756     extension_pref_value_map_->NotifyInitializationCompleted();
1757     return;
1758   }
1759
1760   // When this is called, the PrefService is initialized and provides access
1761   // to the user preferences stored in a JSON file.
1762   ExtensionIdList extension_ids;
1763   {
1764     SCOPED_UMA_HISTOGRAM_TIMER("Extensions.InitPrefGetExtensionsTime");
1765     GetExtensions(&extension_ids);
1766   }
1767   // Create empty preferences dictionary for each extension (these dictionaries
1768   // are pruned when persisting the preferences to disk).
1769   for (ExtensionIdList::iterator ext_id = extension_ids.begin();
1770        ext_id != extension_ids.end(); ++ext_id) {
1771     ScopedExtensionPrefUpdate update(prefs_, *ext_id);
1772     // This creates an empty dictionary if none is stored.
1773     update.Get();
1774   }
1775
1776   FixMissingPrefs(extension_ids);
1777   MigratePermissions(extension_ids);
1778   MigrateDisableReasons(extension_ids);
1779   app_sorting_->Initialize(extension_ids);
1780
1781   InitExtensionControlledPrefs(extension_pref_value_map_);
1782
1783   extension_pref_value_map_->NotifyInitializationCompleted();
1784 }
1785
1786 bool ExtensionPrefs::HasIncognitoPrefValue(const std::string& pref_key) {
1787   bool has_incognito_pref_value = false;
1788   extension_pref_value_map_->GetEffectivePrefValue(pref_key,
1789                                                    true,
1790                                                    &has_incognito_pref_value);
1791   return has_incognito_pref_value;
1792 }
1793
1794 const base::DictionaryValue* ExtensionPrefs::GetGeometryCache(
1795     const std::string& extension_id) const {
1796   const base::DictionaryValue* extension_prefs = GetExtensionPref(extension_id);
1797   if (!extension_prefs)
1798     return NULL;
1799
1800   const base::DictionaryValue* ext = NULL;
1801   if (!extension_prefs->GetDictionary(kPrefGeometryCache, &ext))
1802     return NULL;
1803
1804   return ext;
1805 }
1806
1807 void ExtensionPrefs::SetGeometryCache(
1808     const std::string& extension_id,
1809     scoped_ptr<base::DictionaryValue> cache) {
1810   UpdateExtensionPref(extension_id, kPrefGeometryCache, cache.release());
1811 }
1812
1813 const base::DictionaryValue* ExtensionPrefs::GetInstallSignature() {
1814   return prefs_->GetDictionary(kInstallSignature);
1815 }
1816
1817 void ExtensionPrefs::SetInstallSignature(
1818     const base::DictionaryValue* signature) {
1819   if (signature) {
1820     prefs_->Set(kInstallSignature, *signature);
1821     DVLOG(1) << "SetInstallSignature - saving";
1822   } else {
1823     DVLOG(1) << "SetInstallSignature - clearing";
1824     prefs_->ClearPref(kInstallSignature);
1825   }
1826 }
1827
1828 std::string ExtensionPrefs::GetInstallParam(
1829     const std::string& extension_id) const {
1830   const base::DictionaryValue* extension = GetExtensionPref(extension_id);
1831   if (!extension)  // Expected during unit testing.
1832     return std::string();
1833   std::string install_parameter;
1834   if (!extension->GetString(kPrefInstallParam, &install_parameter))
1835     return std::string();
1836   return install_parameter;
1837 }
1838
1839 void ExtensionPrefs::SetInstallParam(const std::string& extension_id,
1840                                      const std::string& install_parameter) {
1841   UpdateExtensionPref(extension_id,
1842                       kPrefInstallParam,
1843                       new base::StringValue(install_parameter));
1844 }
1845
1846 int ExtensionPrefs::GetCorruptedDisableCount() {
1847   return prefs_->GetInteger(kCorruptedDisableCount);
1848 }
1849
1850 void ExtensionPrefs::IncrementCorruptedDisableCount() {
1851   int count = prefs_->GetInteger(kCorruptedDisableCount);
1852   prefs_->SetInteger(kCorruptedDisableCount, count + 1);
1853 }
1854
1855 ExtensionPrefs::ExtensionPrefs(
1856     PrefService* prefs,
1857     const base::FilePath& root_dir,
1858     ExtensionPrefValueMap* extension_pref_value_map,
1859     scoped_ptr<AppSorting> app_sorting,
1860     scoped_ptr<TimeProvider> time_provider,
1861     bool extensions_disabled,
1862     const std::vector<ExtensionPrefsObserver*>& early_observers)
1863     : prefs_(prefs),
1864       install_directory_(root_dir),
1865       extension_pref_value_map_(extension_pref_value_map),
1866       app_sorting_(app_sorting.Pass()),
1867       time_provider_(time_provider.Pass()),
1868       extensions_disabled_(extensions_disabled) {
1869   app_sorting_->SetExtensionScopedPrefs(this);
1870   MakePathsRelative();
1871
1872   // Ensure that any early observers are watching before prefs are initialized.
1873   for (std::vector<ExtensionPrefsObserver*>::const_iterator iter =
1874            early_observers.begin();
1875        iter != early_observers.end();
1876        ++iter) {
1877     AddObserver(*iter);
1878   }
1879
1880   InitPrefStore();
1881 }
1882
1883 void ExtensionPrefs::SetNeedsStorageGarbageCollection(bool value) {
1884   prefs_->SetBoolean(pref_names::kStorageGarbageCollect, value);
1885 }
1886
1887 bool ExtensionPrefs::NeedsStorageGarbageCollection() {
1888   return prefs_->GetBoolean(pref_names::kStorageGarbageCollect);
1889 }
1890
1891 // static
1892 void ExtensionPrefs::RegisterProfilePrefs(
1893     user_prefs::PrefRegistrySyncable* registry) {
1894   registry->RegisterDictionaryPref(
1895       pref_names::kExtensions,
1896       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1897   registry->RegisterListPref(pref_names::kToolbar,
1898                              user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
1899   registry->RegisterIntegerPref(
1900       pref_names::kToolbarSize,
1901       -1,  // default value
1902       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1903   registry->RegisterDictionaryPref(
1904       kExtensionsBlacklistUpdate,
1905       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1906   registry->RegisterListPref(pref_names::kInstallAllowList,
1907                              user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1908   registry->RegisterListPref(pref_names::kInstallDenyList,
1909                              user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1910   registry->RegisterDictionaryPref(
1911       pref_names::kInstallForceList,
1912       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1913   registry->RegisterListPref(pref_names::kAllowedTypes,
1914                              user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1915   registry->RegisterBooleanPref(
1916       pref_names::kStorageGarbageCollect,
1917       false,  // default value
1918       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1919   registry->RegisterInt64Pref(
1920       pref_names::kLastUpdateCheck,
1921       0,  // default value
1922       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1923   registry->RegisterInt64Pref(
1924       pref_names::kNextUpdateCheck,
1925       0,  // default value
1926       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1927   registry->RegisterListPref(pref_names::kAllowedInstallSites,
1928                              user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1929   registry->RegisterStringPref(
1930       pref_names::kLastChromeVersion,
1931       std::string(),  // default value
1932       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1933   registry->RegisterDictionaryPref(
1934       kInstallSignature,
1935       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1936
1937   registry->RegisterListPref(pref_names::kNativeMessagingBlacklist,
1938                              user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1939   registry->RegisterListPref(pref_names::kNativeMessagingWhitelist,
1940                              user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1941   registry->RegisterBooleanPref(
1942       pref_names::kNativeMessagingUserLevelHosts,
1943       true,  // default value
1944       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1945   registry->RegisterIntegerPref(
1946       kCorruptedDisableCount,
1947       0,  // default value
1948       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1949
1950 #if !defined(OS_MACOSX)
1951   registry->RegisterBooleanPref(
1952       pref_names::kAppFullscreenAllowed, true,
1953       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1954 #endif
1955 }
1956
1957 template <class ExtensionIdContainer>
1958 bool ExtensionPrefs::GetUserExtensionPrefIntoContainer(
1959     const char* pref,
1960     ExtensionIdContainer* id_container_out) {
1961   DCHECK(id_container_out->empty());
1962
1963   const base::Value* user_pref_value = prefs_->GetUserPrefValue(pref);
1964   const base::ListValue* user_pref_as_list;
1965   if (!user_pref_value || !user_pref_value->GetAsList(&user_pref_as_list))
1966     return false;
1967
1968   std::insert_iterator<ExtensionIdContainer> insert_iterator(
1969       *id_container_out, id_container_out->end());
1970   std::string extension_id;
1971   for (base::ListValue::const_iterator value_it = user_pref_as_list->begin();
1972        value_it != user_pref_as_list->end(); ++value_it) {
1973     if (!(*value_it)->GetAsString(&extension_id)) {
1974       NOTREACHED();
1975       continue;
1976     }
1977     insert_iterator = extension_id;
1978   }
1979   return true;
1980 }
1981
1982 template <class ExtensionIdContainer>
1983 void ExtensionPrefs::SetExtensionPrefFromContainer(
1984     const char* pref,
1985     const ExtensionIdContainer& strings) {
1986   ListPrefUpdate update(prefs_, pref);
1987   base::ListValue* list_of_values = update.Get();
1988   list_of_values->Clear();
1989   for (typename ExtensionIdContainer::const_iterator iter = strings.begin();
1990        iter != strings.end(); ++iter) {
1991     list_of_values->Append(new base::StringValue(*iter));
1992   }
1993 }
1994
1995 void ExtensionPrefs::PopulateExtensionInfoPrefs(
1996     const Extension* extension,
1997     const base::Time install_time,
1998     Extension::State initial_state,
1999     int install_flags,
2000     const std::string& install_parameter,
2001     base::DictionaryValue* extension_dict) {
2002   extension_dict->Set(kPrefState, new base::FundamentalValue(initial_state));
2003   extension_dict->Set(kPrefLocation,
2004                       new base::FundamentalValue(extension->location()));
2005   extension_dict->Set(kPrefCreationFlags,
2006                       new base::FundamentalValue(extension->creation_flags()));
2007   extension_dict->Set(kPrefFromWebStore,
2008                       new base::FundamentalValue(extension->from_webstore()));
2009   extension_dict->Set(kPrefFromBookmark,
2010                       new base::FundamentalValue(extension->from_bookmark()));
2011   extension_dict->Set(
2012       kPrefWasInstalledByDefault,
2013       new base::FundamentalValue(extension->was_installed_by_default()));
2014   extension_dict->Set(
2015       kPrefWasInstalledByOem,
2016       new base::FundamentalValue(extension->was_installed_by_oem()));
2017   extension_dict->Set(kPrefInstallTime,
2018                       new base::StringValue(
2019                           base::Int64ToString(install_time.ToInternalValue())));
2020   if (install_flags & kInstallFlagIsBlacklistedForMalware)
2021     extension_dict->Set(kPrefBlacklist, new base::FundamentalValue(true));
2022
2023   if (install_flags & kInstallFlagIsEphemeral)
2024     extension_dict->Set(kPrefEphemeralApp, new base::FundamentalValue(true));
2025   else
2026     extension_dict->Remove(kPrefEphemeralApp, NULL);
2027
2028   base::FilePath::StringType path = MakePathRelative(install_directory_,
2029                                                      extension->path());
2030   extension_dict->Set(kPrefPath, new base::StringValue(path));
2031   if (!install_parameter.empty()) {
2032     extension_dict->Set(kPrefInstallParam,
2033                         new base::StringValue(install_parameter));
2034   }
2035   // We store prefs about LOAD extensions, but don't cache their manifest
2036   // since it may change on disk.
2037   if (!Manifest::IsUnpackedLocation(extension->location())) {
2038     extension_dict->Set(kPrefManifest,
2039                         extension->manifest()->value()->DeepCopy());
2040   }
2041
2042   // Only writes kPrefDoNotSync when it is not the default.
2043   if (install_flags & kInstallFlagDoNotSync)
2044     extension_dict->Set(kPrefDoNotSync, new base::FundamentalValue(true));
2045   else
2046     extension_dict->Remove(kPrefDoNotSync, NULL);
2047 }
2048
2049 void ExtensionPrefs::InitExtensionControlledPrefs(
2050     ExtensionPrefValueMap* value_map) {
2051   TRACE_EVENT0("browser,startup",
2052                "ExtensionPrefs::InitExtensionControlledPrefs")
2053   SCOPED_UMA_HISTOGRAM_TIMER("Extensions.InitExtensionControlledPrefsTime");
2054
2055   ExtensionIdList extension_ids;
2056   GetExtensions(&extension_ids);
2057
2058   for (ExtensionIdList::iterator extension_id = extension_ids.begin();
2059        extension_id != extension_ids.end();
2060        ++extension_id) {
2061     base::Time install_time = GetInstallTime(*extension_id);
2062     bool is_enabled = !IsExtensionDisabled(*extension_id);
2063     bool is_incognito_enabled = IsIncognitoEnabled(*extension_id);
2064     value_map->RegisterExtension(
2065         *extension_id, install_time, is_enabled, is_incognito_enabled);
2066
2067     FOR_EACH_OBSERVER(
2068         ExtensionPrefsObserver,
2069         observer_list_,
2070         OnExtensionRegistered(*extension_id, install_time, is_enabled));
2071
2072     // Set regular extension controlled prefs.
2073     LoadExtensionControlledPrefs(
2074         this, value_map, *extension_id, kExtensionPrefsScopeRegular);
2075     // Set incognito extension controlled prefs.
2076     LoadExtensionControlledPrefs(this,
2077                                  value_map,
2078                                  *extension_id,
2079                                  kExtensionPrefsScopeIncognitoPersistent);
2080     // Set regular-only extension controlled prefs.
2081     LoadExtensionControlledPrefs(
2082         this, value_map, *extension_id, kExtensionPrefsScopeRegularOnly);
2083
2084     FOR_EACH_OBSERVER(ExtensionPrefsObserver,
2085                       observer_list_,
2086                       OnExtensionPrefsLoaded(*extension_id, this));
2087   }
2088 }
2089
2090 void ExtensionPrefs::FinishExtensionInfoPrefs(
2091     const std::string& extension_id,
2092     const base::Time install_time,
2093     bool needs_sort_ordinal,
2094     const syncer::StringOrdinal& suggested_page_ordinal,
2095     base::DictionaryValue* extension_dict) {
2096   // Reinitializes various preferences with empty dictionaries.
2097   if (!extension_dict->HasKey(pref_names::kPrefPreferences)) {
2098     extension_dict->Set(pref_names::kPrefPreferences,
2099                         new base::DictionaryValue);
2100   }
2101
2102   if (!extension_dict->HasKey(pref_names::kPrefIncognitoPreferences)) {
2103     extension_dict->Set(pref_names::kPrefIncognitoPreferences,
2104                         new base::DictionaryValue);
2105   }
2106
2107   if (!extension_dict->HasKey(pref_names::kPrefRegularOnlyPreferences)) {
2108     extension_dict->Set(pref_names::kPrefRegularOnlyPreferences,
2109                         new base::DictionaryValue);
2110   }
2111
2112   if (!extension_dict->HasKey(pref_names::kPrefContentSettings))
2113     extension_dict->Set(pref_names::kPrefContentSettings, new base::ListValue);
2114
2115   if (!extension_dict->HasKey(pref_names::kPrefIncognitoContentSettings)) {
2116     extension_dict->Set(pref_names::kPrefIncognitoContentSettings,
2117                         new base::ListValue);
2118   }
2119
2120   // If this point has been reached, any pending installs should be considered
2121   // out of date.
2122   extension_dict->Remove(kDelayedInstallInfo, NULL);
2123
2124   // Clear state that may be registered from a previous install.
2125   extension_dict->Remove(EventRouter::kRegisteredEvents, NULL);
2126
2127   // FYI, all code below here races on sudden shutdown because |extension_dict|,
2128   // |app_sorting_|, |extension_pref_value_map_|, and (potentially) observers
2129   // are updated non-transactionally. This is probably not fixable without
2130   // nested transactional updates to pref dictionaries.
2131   if (needs_sort_ordinal)
2132     app_sorting_->EnsureValidOrdinals(extension_id, suggested_page_ordinal);
2133
2134   bool is_enabled = false;
2135   int initial_state;
2136   if (extension_dict->GetInteger(kPrefState, &initial_state)) {
2137     is_enabled = initial_state == Extension::ENABLED;
2138   }
2139   bool is_incognito_enabled = IsIncognitoEnabled(extension_id);
2140
2141   extension_pref_value_map_->RegisterExtension(
2142       extension_id, install_time, is_enabled, is_incognito_enabled);
2143
2144   FOR_EACH_OBSERVER(
2145       ExtensionPrefsObserver,
2146       observer_list_,
2147       OnExtensionRegistered(extension_id, install_time, is_enabled));
2148 }
2149
2150 }  // namespace extensions