content/browser/indexed_db/indexed_db_context_impl.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/indexed_db/indexed_db_context_impl.h"
   6
   7 #include <algorithm>
   8 #include <utility>
   9
  10 #include "base/bind.h"
  11 #include "base/command_line.h"
  12 #include "base/files/file_enumerator.h"
  13 #include "base/files/file_util.h"
  14 #include "base/logging.h"
  15 #include "base/metrics/histogram.h"
  16 #include "base/sequenced_task_runner.h"
  17 #include "base/strings/string_util.h"
  18 #include "base/strings/utf_string_conversions.h"
  19 #include "base/threading/thread_restrictions.h"
  20 #include "base/time/time.h"
  21 #include "base/values.h"
  22 #include "content/browser/browser_main_loop.h"
  23 #include "content/browser/indexed_db/indexed_db_connection.h"
  24 #include "content/browser/indexed_db/indexed_db_database.h"
  25 #include "content/browser/indexed_db/indexed_db_dispatcher_host.h"
  26 #include "content/browser/indexed_db/indexed_db_factory_impl.h"
  27 #include "content/browser/indexed_db/indexed_db_quota_client.h"
  28 #include "content/browser/indexed_db/indexed_db_tracing.h"
  29 #include "content/browser/indexed_db/indexed_db_transaction.h"
  30 #include "content/public/browser/browser_thread.h"
  31 #include "content/public/browser/indexed_db_info.h"
  32 #include "content/public/common/content_switches.h"
  33 #include "storage/browser/database/database_util.h"
  34 #include "storage/browser/quota/quota_manager_proxy.h"
  35 #include "storage/browser/quota/special_storage_policy.h"
  36 #include "storage/common/database/database_identifier.h"
  37 #include "ui/base/text/bytes_formatting.h"
  38
  39 using base::DictionaryValue;
  40 using base::ListValue;
  41 using storage::DatabaseUtil;
  42
  43 namespace content {
  44 const base::FilePath::CharType IndexedDBContextImpl::kIndexedDBDirectory[] =
  45     FILE_PATH_LITERAL("IndexedDB");
  46
  47 static const base::FilePath::CharType kBlobExtension[] =
  48     FILE_PATH_LITERAL(".blob");
  49
  50 static const base::FilePath::CharType kIndexedDBExtension[] =
  51     FILE_PATH_LITERAL(".indexeddb");
  52
  53 static const base::FilePath::CharType kLevelDBExtension[] =
  54     FILE_PATH_LITERAL(".leveldb");
  55
  56 namespace {
  57
  58 // This may be called after the IndexedDBContext is destroyed.
  59 void GetAllOriginsAndPaths(const base::FilePath& indexeddb_path,
  60                            std::vector<GURL>* origins,
  61                            std::vector<base::FilePath>* file_paths) {
  62   // TODO(jsbell): DCHECK that this is running on an IndexedDB thread,
  63   // if a global handle to it is ever available.
  64   if (indexeddb_path.empty())
  65     return;
  66   base::FileEnumerator file_enumerator(
  67       indexeddb_path, false, base::FileEnumerator::DIRECTORIES);
  68   for (base::FilePath file_path = file_enumerator.Next(); !file_path.empty();
  69        file_path = file_enumerator.Next()) {
  70     if (file_path.Extension() == kLevelDBExtension &&
  71         file_path.RemoveExtension().Extension() == kIndexedDBExtension) {
  72       std::string origin_id = file_path.BaseName().RemoveExtension()
  73           .RemoveExtension().MaybeAsASCII();
  74       origins->push_back(storage::GetOriginFromIdentifier(origin_id));
  75       if (file_paths)
  76         file_paths->push_back(file_path);
  77     }
  78   }
  79 }
  80
  81 // This will be called after the IndexedDBContext is destroyed.
  82 void ClearSessionOnlyOrigins(
  83     const base::FilePath& indexeddb_path,
  84     scoped_refptr<storage::SpecialStoragePolicy> special_storage_policy) {
  85   // TODO(jsbell): DCHECK that this is running on an IndexedDB thread,
  86   // if a global handle to it is ever available.
  87   std::vector<GURL> origins;
  88   std::vector<base::FilePath> file_paths;
  89   GetAllOriginsAndPaths(indexeddb_path, &origins, &file_paths);
  90   DCHECK_EQ(origins.size(), file_paths.size());
  91   std::vector<base::FilePath>::const_iterator file_path_iter =
  92       file_paths.begin();
  93   for (std::vector<GURL>::const_iterator iter = origins.begin();
  94        iter != origins.end();
  95        ++iter, ++file_path_iter) {
  96     if (!special_storage_policy->IsStorageSessionOnly(*iter))
  97       continue;
  98     if (special_storage_policy->IsStorageProtected(*iter))
  99       continue;
 100     base::DeleteFile(*file_path_iter, true);
 101   }
 102 }
 103
 104 }  // namespace
 105
 106 IndexedDBContextImpl::IndexedDBContextImpl(
 107     const base::FilePath& data_path,
 108     storage::SpecialStoragePolicy* special_storage_policy,
 109     storage::QuotaManagerProxy* quota_manager_proxy,
 110     base::SequencedTaskRunner* task_runner)
 111     : force_keep_session_state_(false),
 112       special_storage_policy_(special_storage_policy),
 113       quota_manager_proxy_(quota_manager_proxy),
 114       task_runner_(task_runner) {
 115   IDB_TRACE("init");
 116   if (!data_path.empty())
 117     data_path_ = data_path.Append(kIndexedDBDirectory);
 118   if (quota_manager_proxy) {
 119     quota_manager_proxy->RegisterClient(new IndexedDBQuotaClient(this));
 120   }
 121 }
 122
 123 IndexedDBFactory* IndexedDBContextImpl::GetIDBFactory() {
 124   DCHECK(TaskRunner()->RunsTasksOnCurrentThread());
 125   if (!factory_.get()) {
 126     // Prime our cache of origins with existing databases so we can
 127     // detect when dbs are newly created.
 128     GetOriginSet();
 129     factory_ = new IndexedDBFactoryImpl(this);
 130   }
 131   return factory_.get();
 132 }
 133
 134 std::vector<GURL> IndexedDBContextImpl::GetAllOrigins() {
 135   DCHECK(TaskRunner()->RunsTasksOnCurrentThread());
 136   std::set<GURL>* origins_set = GetOriginSet();
 137   return std::vector<GURL>(origins_set->begin(), origins_set->end());
 138 }
 139
 140 std::vector<IndexedDBInfo> IndexedDBContextImpl::GetAllOriginsInfo() {
 141   DCHECK(TaskRunner()->RunsTasksOnCurrentThread());
 142   std::vector<GURL> origins = GetAllOrigins();
 143   std::vector<IndexedDBInfo> result;
 144   for (const auto& origin_url : origins) {
 145     base::FilePath idb_directory = GetLevelDBPath(origin_url);
 146     size_t connection_count = GetConnectionCount(origin_url);
 147     result.push_back(IndexedDBInfo(origin_url,
 148                                    GetOriginDiskUsage(origin_url),
 149                                    GetOriginLastModified(origin_url),
 150                                    idb_directory,
 151                                    connection_count));
 152   }
 153   return result;
 154 }
 155
 156 static bool HostNameComparator(const GURL& i, const GURL& j) {
 157   return i.host() < j.host();
 158 }
 159
 160 base::ListValue* IndexedDBContextImpl::GetAllOriginsDetails() {
 161   DCHECK(TaskRunner()->RunsTasksOnCurrentThread());
 162   std::vector<GURL> origins = GetAllOrigins();
 163
 164   std::sort(origins.begin(), origins.end(), HostNameComparator);
 165
 166   scoped_ptr<base::ListValue> list(new base::ListValue());
 167   for (const auto& origin_url : origins) {
 168     scoped_ptr<base::DictionaryValue> info(new base::DictionaryValue());
 169     info->SetString("url", origin_url.spec());
 170     info->SetString("size", ui::FormatBytes(GetOriginDiskUsage(origin_url)));
 171     info->SetDouble("last_modified",
 172                     GetOriginLastModified(origin_url).ToJsTime());
 173     if (!is_incognito()) {
 174       scoped_ptr<base::ListValue> paths(new base::ListValue());
 175       for (const base::FilePath& path : GetStoragePaths(origin_url))
 176         paths->AppendString(path.value());
 177       info->Set("paths", paths.release());
 178     }
 179     info->SetDouble("connection_count", GetConnectionCount(origin_url));
 180
 181     // This ends up being O(n^2) since we iterate over all open databases
 182     // to extract just those in the origin, and we're iterating over all
 183     // origins in the outer loop.
 184
 185     if (factory_.get()) {
 186       std::pair<IndexedDBFactory::OriginDBMapIterator,
 187                 IndexedDBFactory::OriginDBMapIterator> range =
 188           factory_->GetOpenDatabasesForOrigin(origin_url);
 189       // TODO(jsbell): Sort by name?
 190       scoped_ptr<base::ListValue> database_list(new base::ListValue());
 191
 192       for (IndexedDBFactory::OriginDBMapIterator it = range.first;
 193            it != range.second;
 194            ++it) {
 195         const IndexedDBDatabase* db = it->second;
 196         scoped_ptr<base::DictionaryValue> db_info(new base::DictionaryValue());
 197
 198         db_info->SetString("name", db->name());
 199         db_info->SetDouble("pending_opens", db->PendingOpenCount());
 200         db_info->SetDouble("pending_upgrades", db->PendingUpgradeCount());
 201         db_info->SetDouble("running_upgrades", db->RunningUpgradeCount());
 202         db_info->SetDouble("pending_deletes", db->PendingDeleteCount());
 203         db_info->SetDouble("connection_count",
 204                            db->ConnectionCount() - db->PendingUpgradeCount() -
 205                                db->RunningUpgradeCount());
 206
 207         scoped_ptr<base::ListValue> transaction_list(new base::ListValue());
 208         std::vector<const IndexedDBTransaction*> transactions =
 209             db->transaction_coordinator().GetTransactions();
 210         for (const auto* transaction : transactions) {
 211           scoped_ptr<base::DictionaryValue> transaction_info(
 212               new base::DictionaryValue());
 213
 214           const char* kModes[] = { "readonly", "readwrite", "versionchange" };
 215           transaction_info->SetString("mode", kModes[transaction->mode()]);
 216           switch (transaction->state()) {
 217             case IndexedDBTransaction::CREATED:
 218               transaction_info->SetString("status", "blocked");
 219               break;
 220             case IndexedDBTransaction::STARTED:
 221               if (transaction->diagnostics().tasks_scheduled > 0)
 222                 transaction_info->SetString("status", "running");
 223               else
 224                 transaction_info->SetString("status", "started");
 225               break;
 226             case IndexedDBTransaction::COMMITTING:
 227               transaction_info->SetString("status", "committing");
 228               break;
 229             case IndexedDBTransaction::FINISHED:
 230               transaction_info->SetString("status", "finished");
 231               break;
 232           }
 233
 234           transaction_info->SetDouble(
 235               "pid",
 236               IndexedDBDispatcherHost::TransactionIdToProcessId(
 237                   transaction->id()));
 238           transaction_info->SetDouble(
 239               "tid",
 240               IndexedDBDispatcherHost::TransactionIdToRendererTransactionId(
 241                   transaction->id()));
 242           transaction_info->SetDouble(
 243               "age",
 244               (base::Time::Now() - transaction->diagnostics().creation_time)
 245                   .InMillisecondsF());
 246           transaction_info->SetDouble(
 247               "runtime",
 248               (base::Time::Now() - transaction->diagnostics().start_time)
 249                   .InMillisecondsF());
 250           transaction_info->SetDouble(
 251               "tasks_scheduled", transaction->diagnostics().tasks_scheduled);
 252           transaction_info->SetDouble(
 253               "tasks_completed", transaction->diagnostics().tasks_completed);
 254
 255           scoped_ptr<base::ListValue> scope(new base::ListValue());
 256           for (const auto& id : transaction->scope()) {
 257             IndexedDBDatabaseMetadata::ObjectStoreMap::const_iterator it =
 258                 db->metadata().object_stores.find(id);
 259             if (it != db->metadata().object_stores.end())
 260               scope->AppendString(it->second.name);
 261           }
 262
 263           transaction_info->Set("scope", scope.release());
 264           transaction_list->Append(transaction_info.release());
 265         }
 266         db_info->Set("transactions", transaction_list.release());
 267
 268         database_list->Append(db_info.release());
 269       }
 270       info->Set("databases", database_list.release());
 271     }
 272
 273     list->Append(info.release());
 274   }
 275   return list.release();
 276 }
 277
 278 int64 IndexedDBContextImpl::GetOriginDiskUsage(const GURL& origin_url) {
 279   DCHECK(TaskRunner()->RunsTasksOnCurrentThread());
 280   if (data_path_.empty() || !IsInOriginSet(origin_url))
 281     return 0;
 282   EnsureDiskUsageCacheInitialized(origin_url);
 283   return origin_size_map_[origin_url];
 284 }
 285
 286 base::Time IndexedDBContextImpl::GetOriginLastModified(const GURL& origin_url) {
 287   DCHECK(TaskRunner()->RunsTasksOnCurrentThread());
 288   if (data_path_.empty() || !IsInOriginSet(origin_url))
 289     return base::Time();
 290   base::FilePath idb_directory = GetLevelDBPath(origin_url);
 291   base::File::Info file_info;
 292   if (!base::GetFileInfo(idb_directory, &file_info))
 293     return base::Time();
 294   return file_info.last_modified;
 295 }
 296
 297 void IndexedDBContextImpl::DeleteForOrigin(const GURL& origin_url) {
 298   DCHECK(TaskRunner()->RunsTasksOnCurrentThread());
 299   ForceClose(origin_url, FORCE_CLOSE_DELETE_ORIGIN);
 300   if (data_path_.empty() || !IsInOriginSet(origin_url))
 301     return;
 302
 303   base::FilePath idb_directory = GetLevelDBPath(origin_url);
 304   EnsureDiskUsageCacheInitialized(origin_url);
 305   leveldb::Status s = LevelDBDatabase::Destroy(idb_directory);
 306   if (!s.ok()) {
 307     LOG(WARNING) << "Failed to delete LevelDB database: "
 308                  << idb_directory.AsUTF8Unsafe();
 309   } else {
 310     // LevelDB does not delete empty directories; work around this.
 311     // TODO(jsbell): Remove when upstream bug is fixed.
 312     // https://code.google.com/p/leveldb/issues/detail?id=209
 313     const bool kNonRecursive = false;
 314     base::DeleteFile(idb_directory, kNonRecursive);
 315   }
 316   base::DeleteFile(GetBlobPath(storage::GetIdentifierFromOrigin(origin_url)),
 317                    true /* recursive */);
 318   QueryDiskAndUpdateQuotaUsage(origin_url);
 319   if (s.ok()) {
 320     RemoveFromOriginSet(origin_url);
 321     origin_size_map_.erase(origin_url);
 322     space_available_map_.erase(origin_url);
 323   }
 324 }
 325
 326 void IndexedDBContextImpl::ForceClose(const GURL origin_url,
 327                                       ForceCloseReason reason) {
 328   DCHECK(TaskRunner()->RunsTasksOnCurrentThread());
 329   UMA_HISTOGRAM_ENUMERATION("WebCore.IndexedDB.Context.ForceCloseReason",
 330                             reason,
 331                             FORCE_CLOSE_REASON_MAX);
 332
 333   if (data_path_.empty() || !IsInOriginSet(origin_url))
 334     return;
 335
 336   if (factory_.get())
 337     factory_->ForceClose(origin_url);
 338   DCHECK_EQ(0UL, GetConnectionCount(origin_url));
 339 }
 340
 341 size_t IndexedDBContextImpl::GetConnectionCount(const GURL& origin_url) {
 342   DCHECK(TaskRunner()->RunsTasksOnCurrentThread());
 343   if (data_path_.empty() || !IsInOriginSet(origin_url))
 344     return 0;
 345
 346   if (!factory_.get())
 347     return 0;
 348
 349   return factory_->GetConnectionCount(origin_url);
 350 }
 351
 352 base::FilePath IndexedDBContextImpl::GetLevelDBPath(
 353     const GURL& origin_url) const {
 354   std::string origin_id = storage::GetIdentifierFromOrigin(origin_url);
 355   return GetLevelDBPath(origin_id);
 356 }
 357
 358 std::vector<base::FilePath> IndexedDBContextImpl::GetStoragePaths(
 359     const GURL& origin_url) const {
 360   std::string origin_id = storage::GetIdentifierFromOrigin(origin_url);
 361   std::vector<base::FilePath> paths;
 362   paths.push_back(GetLevelDBPath(origin_id));
 363   paths.push_back(GetBlobPath(origin_id));
 364   return paths;
 365 }
 366
 367 base::FilePath IndexedDBContextImpl::GetFilePathForTesting(
 368     const std::string& origin_id) const {
 369   return GetLevelDBPath(origin_id);
 370 }
 371
 372 void IndexedDBContextImpl::SetTaskRunnerForTesting(
 373     base::SequencedTaskRunner* task_runner) {
 374   DCHECK(!task_runner_.get());
 375   task_runner_ = task_runner;
 376 }
 377
 378 void IndexedDBContextImpl::ConnectionOpened(const GURL& origin_url,
 379                                             IndexedDBConnection* connection) {
 380   DCHECK(TaskRunner()->RunsTasksOnCurrentThread());
 381   if (quota_manager_proxy()) {
 382     quota_manager_proxy()->NotifyStorageAccessed(
 383         storage::QuotaClient::kIndexedDatabase,
 384         origin_url,
 385         storage::kStorageTypeTemporary);
 386   }
 387   if (AddToOriginSet(origin_url)) {
 388     // A newly created db, notify the quota system.
 389     QueryDiskAndUpdateQuotaUsage(origin_url);
 390   } else {
 391     EnsureDiskUsageCacheInitialized(origin_url);
 392   }
 393   QueryAvailableQuota(origin_url);
 394 }
 395
 396 void IndexedDBContextImpl::ConnectionClosed(const GURL& origin_url,
 397                                             IndexedDBConnection* connection) {
 398   DCHECK(TaskRunner()->RunsTasksOnCurrentThread());
 399   if (quota_manager_proxy()) {
 400     quota_manager_proxy()->NotifyStorageAccessed(
 401         storage::QuotaClient::kIndexedDatabase,
 402         origin_url,
 403         storage::kStorageTypeTemporary);
 404   }
 405   if (factory_.get() && factory_->GetConnectionCount(origin_url) == 0)
 406     QueryDiskAndUpdateQuotaUsage(origin_url);
 407 }
 408
 409 void IndexedDBContextImpl::TransactionComplete(const GURL& origin_url) {
 410   DCHECK(!factory_.get() || factory_->GetConnectionCount(origin_url) > 0);
 411   QueryDiskAndUpdateQuotaUsage(origin_url);
 412   QueryAvailableQuota(origin_url);
 413 }
 414
 415 void IndexedDBContextImpl::DatabaseDeleted(const GURL& origin_url) {
 416   AddToOriginSet(origin_url);
 417   QueryDiskAndUpdateQuotaUsage(origin_url);
 418   QueryAvailableQuota(origin_url);
 419 }
 420
 421 bool IndexedDBContextImpl::WouldBeOverQuota(const GURL& origin_url,
 422                                             int64 additional_bytes) {
 423   if (space_available_map_.find(origin_url) == space_available_map_.end()) {
 424     // We haven't heard back from the QuotaManager yet, just let it through.
 425     return false;
 426   }
 427   bool over_quota = additional_bytes > space_available_map_[origin_url];
 428   return over_quota;
 429 }
 430
 431 bool IndexedDBContextImpl::IsOverQuota(const GURL& origin_url) {
 432   const int kOneAdditionalByte = 1;
 433   return WouldBeOverQuota(origin_url, kOneAdditionalByte);
 434 }
 435
 436 storage::QuotaManagerProxy* IndexedDBContextImpl::quota_manager_proxy() {
 437   return quota_manager_proxy_.get();
 438 }
 439
 440 IndexedDBContextImpl::~IndexedDBContextImpl() {
 441   if (factory_.get()) {
 442     TaskRunner()->PostTask(
 443         FROM_HERE, base::Bind(&IndexedDBFactory::ContextDestroyed, factory_));
 444     factory_ = NULL;
 445   }
 446
 447   if (data_path_.empty())
 448     return;
 449
 450   if (force_keep_session_state_)
 451     return;
 452
 453   bool has_session_only_databases =
 454       special_storage_policy_.get() &&
 455       special_storage_policy_->HasSessionOnlyOrigins();
 456
 457   // Clearing only session-only databases, and there are none.
 458   if (!has_session_only_databases)
 459     return;
 460
 461   TaskRunner()->PostTask(
 462       FROM_HERE,
 463       base::Bind(
 464           &ClearSessionOnlyOrigins, data_path_, special_storage_policy_));
 465 }
 466
 467 base::FilePath IndexedDBContextImpl::GetBlobPath(
 468     const std::string& origin_id) const {
 469   DCHECK(!data_path_.empty());
 470   return data_path_.AppendASCII(origin_id).AddExtension(kIndexedDBExtension)
 471       .AddExtension(kBlobExtension);
 472 }
 473
 474 base::FilePath IndexedDBContextImpl::GetLevelDBPath(
 475     const std::string& origin_id) const {
 476   DCHECK(!data_path_.empty());
 477   return data_path_.AppendASCII(origin_id).AddExtension(kIndexedDBExtension)
 478       .AddExtension(kLevelDBExtension);
 479 }
 480
 481 int64 IndexedDBContextImpl::ReadUsageFromDisk(const GURL& origin_url) const {
 482   if (data_path_.empty())
 483     return 0;
 484   int64 total_size = 0;
 485   for (const base::FilePath& path : GetStoragePaths(origin_url))
 486     total_size += base::ComputeDirectorySize(path);
 487   return total_size;
 488 }
 489
 490 void IndexedDBContextImpl::EnsureDiskUsageCacheInitialized(
 491     const GURL& origin_url) {
 492   if (origin_size_map_.find(origin_url) == origin_size_map_.end())
 493     origin_size_map_[origin_url] = ReadUsageFromDisk(origin_url);
 494 }
 495
 496 void IndexedDBContextImpl::QueryDiskAndUpdateQuotaUsage(
 497     const GURL& origin_url) {
 498   int64 former_disk_usage = origin_size_map_[origin_url];
 499   int64 current_disk_usage = ReadUsageFromDisk(origin_url);
 500   int64 difference = current_disk_usage - former_disk_usage;
 501   if (difference) {
 502     origin_size_map_[origin_url] = current_disk_usage;
 503     // quota_manager_proxy() is NULL in unit tests.
 504     if (quota_manager_proxy()) {
 505       quota_manager_proxy()->NotifyStorageModified(
 506           storage::QuotaClient::kIndexedDatabase,
 507           origin_url,
 508           storage::kStorageTypeTemporary,
 509           difference);
 510     }
 511   }
 512 }
 513
 514 void IndexedDBContextImpl::GotUsageAndQuota(const GURL& origin_url,
 515                                             storage::QuotaStatusCode status,
 516                                             int64 usage,
 517                                             int64 quota) {
 518   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 519   DCHECK(status == storage::kQuotaStatusOk ||
 520          status == storage::kQuotaErrorAbort)
 521       << "status was " << status;
 522   if (status == storage::kQuotaErrorAbort) {
 523     // We seem to no longer care to wait around for the answer.
 524     return;
 525   }
 526   TaskRunner()->PostTask(FROM_HERE,
 527                          base::Bind(&IndexedDBContextImpl::GotUpdatedQuota,
 528                                     this,
 529                                     origin_url,
 530                                     usage,
 531                                     quota));
 532 }
 533
 534 void IndexedDBContextImpl::GotUpdatedQuota(const GURL& origin_url,
 535                                            int64 usage,
 536                                            int64 quota) {
 537   DCHECK(TaskRunner()->RunsTasksOnCurrentThread());
 538   space_available_map_[origin_url] = quota - usage;
 539 }
 540
 541 void IndexedDBContextImpl::QueryAvailableQuota(const GURL& origin_url) {
 542   if (!BrowserThread::CurrentlyOn(BrowserThread::IO)) {
 543     DCHECK(TaskRunner()->RunsTasksOnCurrentThread());
 544     if (quota_manager_proxy()) {
 545       BrowserThread::PostTask(
 546           BrowserThread::IO,
 547           FROM_HERE,
 548           base::Bind(
 549               &IndexedDBContextImpl::QueryAvailableQuota, this, origin_url));
 550     }
 551     return;
 552   }
 553   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 554   if (!quota_manager_proxy() || !quota_manager_proxy()->quota_manager())
 555     return;
 556   quota_manager_proxy()->quota_manager()->GetUsageAndQuota(
 557       origin_url,
 558       storage::kStorageTypeTemporary,
 559       base::Bind(&IndexedDBContextImpl::GotUsageAndQuota, this, origin_url));
 560 }
 561
 562 std::set<GURL>* IndexedDBContextImpl::GetOriginSet() {
 563   if (!origin_set_) {
 564     std::vector<GURL> origins;
 565     GetAllOriginsAndPaths(data_path_, &origins, NULL);
 566     origin_set_.reset(new std::set<GURL>(origins.begin(), origins.end()));
 567   }
 568   return origin_set_.get();
 569 }
 570
 571 void IndexedDBContextImpl::ResetCaches() {
 572   origin_set_.reset();
 573   origin_size_map_.clear();
 574   space_available_map_.clear();
 575 }
 576
 577 base::SequencedTaskRunner* IndexedDBContextImpl::TaskRunner() const {
 578   return task_runner_.get();
 579 }
 580
 581 }  // namespace content