Migrate webkit/browser/ to storage/browser/

webkit/browser/database/database_tracker.cc

Index: webkit/browser/database/database_tracker.cc
diff --git a/webkit/browser/database/database_tracker.cc b/webkit/browser/database/database_tracker.cc
deleted file mode 100644
index 257e25059ada5098384c3d2f30b50d3d39e9a266..0000000000000000000000000000000000000000
--- a/webkit/browser/database/database_tracker.cc
+++ /dev/null
@@ -1,869 +0,0 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "webkit/browser/database/database_tracker.h"
-
-#include <algorithm>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/bind.h"
-#include "base/file_util.h"
-#include "base/files/file.h"
-#include "base/files/file_enumerator.h"
-#include "base/message_loop/message_loop_proxy.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/utf_string_conversions.h"
-#include "net/base/net_errors.h"
-#include "sql/connection.h"
-#include "sql/meta_table.h"
-#include "sql/transaction.h"
-#include "third_party/sqlite/sqlite3.h"
-#include "webkit/browser/database/database_quota_client.h"
-#include "webkit/browser/database/database_util.h"
-#include "webkit/browser/database/databases_table.h"
-#include "webkit/browser/quota/quota_manager_proxy.h"
-#include "webkit/browser/quota/special_storage_policy.h"
-#include "webkit/common/database/database_identifier.h"
-
-namespace storage {
-
-const base::FilePath::CharType kDatabaseDirectoryName[] =
-    FILE_PATH_LITERAL("databases");
-const base::FilePath::CharType kIncognitoDatabaseDirectoryName[] =
-    FILE_PATH_LITERAL("databases-incognito");
-const base::FilePath::CharType kTrackerDatabaseFileName[] =
-    FILE_PATH_LITERAL("Databases.db");
-static const int kCurrentVersion = 2;
-static const int kCompatibleVersion = 1;
-
-const base::FilePath::CharType kTemporaryDirectoryPrefix[] =
-    FILE_PATH_LITERAL("DeleteMe");
-const base::FilePath::CharType kTemporaryDirectoryPattern[] =
-    FILE_PATH_LITERAL("DeleteMe*");
-
-OriginInfo::OriginInfo()
-    : total_size_(0) {}
-
-OriginInfo::OriginInfo(const OriginInfo& origin_info)
-    : origin_identifier_(origin_info.origin_identifier_),
-      total_size_(origin_info.total_size_),
-      database_info_(origin_info.database_info_) {}
-
-OriginInfo::~OriginInfo() {}
-
-void OriginInfo::GetAllDatabaseNames(
-    std::vector<base::string16>* databases) const {
-  for (DatabaseInfoMap::const_iterator it = database_info_.begin();
-       it != database_info_.end(); it++) {
-    databases->push_back(it->first);
-  }
-}
-
-int64 OriginInfo::GetDatabaseSize(const base::string16& database_name) const {
-  DatabaseInfoMap::const_iterator it = database_info_.find(database_name);
-  if (it != database_info_.end())
-    return it->second.first;
-  return 0;
-}
-
-base::string16 OriginInfo::GetDatabaseDescription(
-    const base::string16& database_name) const {
-  DatabaseInfoMap::const_iterator it = database_info_.find(database_name);
-  if (it != database_info_.end())
-    return it->second.second;
-  return base::string16();
-}
-
-OriginInfo::OriginInfo(const std::string& origin_identifier, int64 total_size)
-    : origin_identifier_(origin_identifier), total_size_(total_size) {}
-
-DatabaseTracker::DatabaseTracker(
-    const base::FilePath& profile_path,
-    bool is_incognito,
-    storage::SpecialStoragePolicy* special_storage_policy,
-    storage::QuotaManagerProxy* quota_manager_proxy,
-    base::MessageLoopProxy* db_tracker_thread)
-    : is_initialized_(false),
-      is_incognito_(is_incognito),
-      force_keep_session_state_(false),
-      shutting_down_(false),
-      profile_path_(profile_path),
-      db_dir_(is_incognito_
-                  ? profile_path_.Append(kIncognitoDatabaseDirectoryName)
-                  : profile_path_.Append(kDatabaseDirectoryName)),
-      db_(new sql::Connection()),
-      special_storage_policy_(special_storage_policy),
-      quota_manager_proxy_(quota_manager_proxy),
-      db_tracker_thread_(db_tracker_thread),
-      incognito_origin_directories_generator_(0) {
-  if (quota_manager_proxy) {
-    quota_manager_proxy->RegisterClient(
-        new DatabaseQuotaClient(db_tracker_thread, this));
-  }
-}
-
-DatabaseTracker::~DatabaseTracker() {
-  DCHECK(dbs_to_be_deleted_.empty());
-  DCHECK(deletion_callbacks_.empty());
-}
-
-void DatabaseTracker::DatabaseOpened(const std::string& origin_identifier,
-                                     const base::string16& database_name,
-                                     const base::string16& database_description,
-                                     int64 estimated_size,
-                                     int64* database_size) {
-  if (shutting_down_ || !LazyInit()) {
-    *database_size = 0;
-    return;
-  }
-
-  if (quota_manager_proxy_.get())
-    quota_manager_proxy_->NotifyStorageAccessed(
-        storage::QuotaClient::kDatabase,
-        storage::GetOriginFromIdentifier(origin_identifier),
-        storage::kStorageTypeTemporary);
-
-  InsertOrUpdateDatabaseDetails(origin_identifier, database_name,
-                                database_description, estimated_size);
-  if (database_connections_.AddConnection(origin_identifier, database_name)) {
-    *database_size = SeedOpenDatabaseInfo(origin_identifier,
-                                          database_name,
-                                          database_description);
-    return;
-  }
-  *database_size  = UpdateOpenDatabaseInfoAndNotify(origin_identifier,
-                                                    database_name,
-                                                    &database_description);
-}
-
-void DatabaseTracker::DatabaseModified(const std::string& origin_identifier,
-                                       const base::string16& database_name) {
-  if (!LazyInit())
-    return;
-  UpdateOpenDatabaseSizeAndNotify(origin_identifier, database_name);
-}
-
-void DatabaseTracker::DatabaseClosed(const std::string& origin_identifier,
-                                     const base::string16& database_name) {
-  if (database_connections_.IsEmpty()) {
-    DCHECK(!is_initialized_);
-    return;
-  }
-
-  // We call NotifiyStorageAccessed when a db is opened and also when
-  // closed because we don't call it for read while open.
-  if (quota_manager_proxy_.get())
-    quota_manager_proxy_->NotifyStorageAccessed(
-        storage::QuotaClient::kDatabase,
-        storage::GetOriginFromIdentifier(origin_identifier),
-        storage::kStorageTypeTemporary);
-
-  UpdateOpenDatabaseSizeAndNotify(origin_identifier, database_name);
-  if (database_connections_.RemoveConnection(origin_identifier, database_name))
-    DeleteDatabaseIfNeeded(origin_identifier, database_name);
-}
-
-void DatabaseTracker::HandleSqliteError(
-    const std::string& origin_identifier,
-    const base::string16& database_name,
-    int error) {
-  // We only handle errors that indicate corruption and we
-  // do so with a heavy hand, we delete it. Any renderers/workers
-  // with this database open will receive a message to close it
-  // immediately, once all have closed, the files will be deleted.
-  // In the interim, all attempts to open a new connection to that
-  // database will fail.
-  // Note: the client-side filters out all but these two errors as
-  // a small optimization, see WebDatabaseObserverImpl::HandleSqliteError.
-  if (error == SQLITE_CORRUPT || error == SQLITE_NOTADB) {
-    DeleteDatabase(origin_identifier, database_name,
-                   net::CompletionCallback());
-  }
-}
-
-void DatabaseTracker::CloseDatabases(const DatabaseConnections& connections) {
-  if (database_connections_.IsEmpty()) {
-    DCHECK(!is_initialized_ || connections.IsEmpty());
-    return;
-  }
-
-  // When being closed by this route, there's a chance that
-  // the tracker missed some DatabseModified calls. This method is used
-  // when a renderer crashes to cleanup its open resources.
-  // We need to examine what we have in connections for the
-  // size of each open databases and notify any differences between the
-  // actual file sizes now.
-  std::vector<std::pair<std::string, base::string16> > open_dbs;
-  connections.ListConnections(&open_dbs);
-  for (std::vector<std::pair<std::string, base::string16> >::iterator it =
-           open_dbs.begin(); it != open_dbs.end(); ++it)
-    UpdateOpenDatabaseSizeAndNotify(it->first, it->second);
-
-  std::vector<std::pair<std::string, base::string16> > closed_dbs;
-  database_connections_.RemoveConnections(connections, &closed_dbs);
-  for (std::vector<std::pair<std::string, base::string16> >::iterator it =
-           closed_dbs.begin(); it != closed_dbs.end(); ++it) {
-    DeleteDatabaseIfNeeded(it->first, it->second);
-  }
-}
-
-void DatabaseTracker::DeleteDatabaseIfNeeded(
-    const std::string& origin_identifier,
-    const base::string16& database_name) {
-  DCHECK(!database_connections_.IsDatabaseOpened(origin_identifier,
-                                                 database_name));
-  if (IsDatabaseScheduledForDeletion(origin_identifier, database_name)) {
-    DeleteClosedDatabase(origin_identifier, database_name);
-    dbs_to_be_deleted_[origin_identifier].erase(database_name);
-    if (dbs_to_be_deleted_[origin_identifier].empty())
-      dbs_to_be_deleted_.erase(origin_identifier);
-
-    PendingDeletionCallbacks::iterator callback = deletion_callbacks_.begin();
-    while (callback != deletion_callbacks_.end()) {
-      DatabaseSet::iterator found_origin =
-          callback->second.find(origin_identifier);
-      if (found_origin != callback->second.end()) {
-        std::set<base::string16>& databases = found_origin->second;
-        databases.erase(database_name);
-        if (databases.empty()) {
-          callback->second.erase(found_origin);
-          if (callback->second.empty()) {
-            net::CompletionCallback cb = callback->first;
-            cb.Run(net::OK);
-            callback = deletion_callbacks_.erase(callback);
-            continue;
-          }
-        }
-      }
-
-      ++callback;
-    }
-  }
-}
-
-void DatabaseTracker::AddObserver(Observer* observer) {
-  observers_.AddObserver(observer);
-}
-
-void DatabaseTracker::RemoveObserver(Observer* observer) {
-  // When we remove a listener, we do not know which cached information
-  // is still needed and which information can be discarded. So we just
-  // clear all caches and re-populate them as needed.
-  observers_.RemoveObserver(observer);
-  ClearAllCachedOriginInfo();
-}
-
-void DatabaseTracker::CloseTrackerDatabaseAndClearCaches() {
-  ClearAllCachedOriginInfo();
-
-  if (!is_incognito_) {
-    meta_table_.reset(NULL);
-    databases_table_.reset(NULL);
-    db_->Close();
-    is_initialized_ = false;
-  }
-}
-
-base::string16 DatabaseTracker::GetOriginDirectory(
-    const std::string& origin_identifier) {
-  if (!is_incognito_)
-    return base::UTF8ToUTF16(origin_identifier);
-
-  OriginDirectoriesMap::const_iterator it =
-      incognito_origin_directories_.find(origin_identifier);
-  if (it != incognito_origin_directories_.end())
-    return it->second;
-
-  base::string16 origin_directory =
-      base::IntToString16(incognito_origin_directories_generator_++);
-  incognito_origin_directories_[origin_identifier] = origin_directory;
-  return origin_directory;
-}
-
-base::FilePath DatabaseTracker::GetFullDBFilePath(
-    const std::string& origin_identifier,
-    const base::string16& database_name) {
-  DCHECK(!origin_identifier.empty());
-  if (!LazyInit())
-    return base::FilePath();
-
-  int64 id = databases_table_->GetDatabaseID(origin_identifier, database_name);
-  if (id < 0)
-    return base::FilePath();
-
-  return db_dir_.Append(base::FilePath::FromUTF16Unsafe(
-      GetOriginDirectory(origin_identifier))).AppendASCII(
-          base::Int64ToString(id));
-}
-
-bool DatabaseTracker::GetOriginInfo(const std::string& origin_identifier,
-                                    OriginInfo* info) {
-  DCHECK(info);
-  CachedOriginInfo* cached_info = GetCachedOriginInfo(origin_identifier);
-  if (!cached_info)
-    return false;
-  *info = OriginInfo(*cached_info);
-  return true;
-}
-
-bool DatabaseTracker::GetAllOriginIdentifiers(
-    std::vector<std::string>* origin_identifiers) {
-  DCHECK(origin_identifiers);
-  DCHECK(origin_identifiers->empty());
-  if (!LazyInit())
-    return false;
-  return databases_table_->GetAllOriginIdentifiers(origin_identifiers);
-}
-
-bool DatabaseTracker::GetAllOriginsInfo(
-    std::vector<OriginInfo>* origins_info) {
-  DCHECK(origins_info);
-  DCHECK(origins_info->empty());
-
-  std::vector<std::string> origins;
-  if (!GetAllOriginIdentifiers(&origins))
-    return false;
-
-  for (std::vector<std::string>::const_iterator it = origins.begin();
-       it != origins.end(); it++) {
-    CachedOriginInfo* origin_info = GetCachedOriginInfo(*it);
-    if (!origin_info) {
-      // Restore 'origins_info' to its initial state.
-      origins_info->clear();
-      return false;
-    }
-    origins_info->push_back(OriginInfo(*origin_info));
-  }
-
-  return true;
-}
-
-bool DatabaseTracker::DeleteClosedDatabase(
-    const std::string& origin_identifier,
-    const base::string16& database_name) {
-  if (!LazyInit())
-    return false;
-
-  // Check if the database is opened by any renderer.
-  if (database_connections_.IsDatabaseOpened(origin_identifier, database_name))
-    return false;
-
-  int64 db_file_size = quota_manager_proxy_.get()
-                           ? GetDBFileSize(origin_identifier, database_name)
-                           : 0;
-
-  // Try to delete the file on the hard drive.
-  base::FilePath db_file = GetFullDBFilePath(origin_identifier, database_name);
-  if (!sql::Connection::Delete(db_file))
-    return false;
-
-  if (quota_manager_proxy_.get() && db_file_size)
-    quota_manager_proxy_->NotifyStorageModified(
-        storage::QuotaClient::kDatabase,
-        storage::GetOriginFromIdentifier(origin_identifier),
-        storage::kStorageTypeTemporary,
-        -db_file_size);
-
-  // Clean up the main database and invalidate the cached record.
-  databases_table_->DeleteDatabaseDetails(origin_identifier, database_name);
-  origins_info_map_.erase(origin_identifier);
-
-  std::vector<DatabaseDetails> details;
-  if (databases_table_->GetAllDatabaseDetailsForOriginIdentifier(
-          origin_identifier, &details) && details.empty()) {
-    // Try to delete the origin in case this was the last database.
-    DeleteOrigin(origin_identifier, false);
-  }
-  return true;
-}
-
-bool DatabaseTracker::DeleteOrigin(const std::string& origin_identifier,
-                                   bool force) {
-  if (!LazyInit())
-    return false;
-
-  // Check if any database in this origin is opened by any renderer.
-  if (database_connections_.IsOriginUsed(origin_identifier) && !force)
-    return false;
-
-  int64 deleted_size = 0;
-  if (quota_manager_proxy_.get()) {
-    CachedOriginInfo* origin_info = GetCachedOriginInfo(origin_identifier);
-    if (origin_info)
-      deleted_size = origin_info->TotalSize();
-  }
-
-  origins_info_map_.erase(origin_identifier);
-  base::FilePath origin_dir = db_dir_.AppendASCII(origin_identifier);
-
-  // Create a temporary directory to move possibly still existing databases to,
-  // as we can't delete the origin directory on windows if it contains opened
-  // files.
-  base::FilePath new_origin_dir;
-  base::CreateTemporaryDirInDir(db_dir_,
-                                kTemporaryDirectoryPrefix,
-                                &new_origin_dir);
-  base::FileEnumerator databases(
-      origin_dir,
-      false,
-      base::FileEnumerator::FILES);
-  for (base::FilePath database = databases.Next(); !database.empty();
-       database = databases.Next()) {
-    base::FilePath new_file = new_origin_dir.Append(database.BaseName());
-    base::Move(database, new_file);
-  }
-  base::DeleteFile(origin_dir, true);
-  base::DeleteFile(new_origin_dir, true); // might fail on windows.
-
-  databases_table_->DeleteOriginIdentifier(origin_identifier);
-
-  if (quota_manager_proxy_.get() && deleted_size) {
-    quota_manager_proxy_->NotifyStorageModified(
-        storage::QuotaClient::kDatabase,
-        storage::GetOriginFromIdentifier(origin_identifier),
-        storage::kStorageTypeTemporary,
-        -deleted_size);
-  }
-
-  return true;
-}
-
-bool DatabaseTracker::IsDatabaseScheduledForDeletion(
-    const std::string& origin_identifier,
-    const base::string16& database_name) {
-  DatabaseSet::iterator it = dbs_to_be_deleted_.find(origin_identifier);
-  if (it == dbs_to_be_deleted_.end())
-    return false;
-
-  std::set<base::string16>& databases = it->second;
-  return (databases.find(database_name) != databases.end());
-}
-
-bool DatabaseTracker::LazyInit() {
-  if (!is_initialized_ && !shutting_down_) {
-    DCHECK(!db_->is_open());
-    DCHECK(!databases_table_.get());
-    DCHECK(!meta_table_.get());
-
-    // If there are left-over directories from failed deletion attempts, clean
-    // them up.
-    if (base::DirectoryExists(db_dir_)) {
-      base::FileEnumerator directories(
-          db_dir_,
-          false,
-          base::FileEnumerator::DIRECTORIES,
-          kTemporaryDirectoryPattern);
-      for (base::FilePath directory = directories.Next(); !directory.empty();
-           directory = directories.Next()) {
-        base::DeleteFile(directory, true);
-      }
-    }
-
-    // If the tracker database exists, but it's corrupt or doesn't
-    // have a meta table, delete the database directory.
-    const base::FilePath kTrackerDatabaseFullPath =
-        db_dir_.Append(base::FilePath(kTrackerDatabaseFileName));
-    if (base::DirectoryExists(db_dir_) &&
-        base::PathExists(kTrackerDatabaseFullPath) &&
-        (!db_->Open(kTrackerDatabaseFullPath) ||
-         !sql::MetaTable::DoesTableExist(db_.get()))) {
-      db_->Close();
-      if (!base::DeleteFile(db_dir_, true))
-        return false;
-    }
-
-    db_->set_histogram_tag("DatabaseTracker");
-
-    databases_table_.reset(new DatabasesTable(db_.get()));
-    meta_table_.reset(new sql::MetaTable());
-
-    is_initialized_ =
-        base::CreateDirectory(db_dir_) &&
-        (db_->is_open() ||
-         (is_incognito_ ? db_->OpenInMemory() :
-          db_->Open(kTrackerDatabaseFullPath))) &&
-        UpgradeToCurrentVersion();
-    if (!is_initialized_) {
-      databases_table_.reset(NULL);
-      meta_table_.reset(NULL);
-      db_->Close();
-    }
-  }
-  return is_initialized_;
-}
-
-bool DatabaseTracker::UpgradeToCurrentVersion() {
-  sql::Transaction transaction(db_.get());
-  if (!transaction.Begin() ||
-      !meta_table_->Init(db_.get(), kCurrentVersion, kCompatibleVersion) ||
-      (meta_table_->GetCompatibleVersionNumber() > kCurrentVersion) ||
-      !databases_table_->Init())
-    return false;
-
-  if (meta_table_->GetVersionNumber() < kCurrentVersion)
-    meta_table_->SetVersionNumber(kCurrentVersion);
-
-  return transaction.Commit();
-}
-
-void DatabaseTracker::InsertOrUpdateDatabaseDetails(
-    const std::string& origin_identifier,
-    const base::string16& database_name,
-    const base::string16& database_description,
-    int64 estimated_size) {
-  DatabaseDetails details;
-  if (!databases_table_->GetDatabaseDetails(
-          origin_identifier, database_name, &details)) {
-    details.origin_identifier = origin_identifier;
-    details.database_name = database_name;
-    details.description = database_description;
-    details.estimated_size = estimated_size;
-    databases_table_->InsertDatabaseDetails(details);
-  } else if ((details.description != database_description) ||
-             (details.estimated_size != estimated_size)) {
-    details.description = database_description;
-    details.estimated_size = estimated_size;
-    databases_table_->UpdateDatabaseDetails(details);
-  }
-}
-
-void DatabaseTracker::ClearAllCachedOriginInfo() {
-  origins_info_map_.clear();
-}
-
-DatabaseTracker::CachedOriginInfo* DatabaseTracker::MaybeGetCachedOriginInfo(
-    const std::string& origin_identifier, bool create_if_needed) {
-  if (!LazyInit())
-    return NULL;
-
-  // Populate the cache with data for this origin if needed.
-  if (origins_info_map_.find(origin_identifier) == origins_info_map_.end()) {
-    if (!create_if_needed)
-      return NULL;
-
-    std::vector<DatabaseDetails> details;
-    if (!databases_table_->GetAllDatabaseDetailsForOriginIdentifier(
-            origin_identifier, &details)) {
-      return NULL;
-    }
-
-    CachedOriginInfo& origin_info = origins_info_map_[origin_identifier];
-    origin_info.SetOriginIdentifier(origin_identifier);
-    for (std::vector<DatabaseDetails>::const_iterator it = details.begin();
-         it != details.end(); it++) {
-      int64 db_file_size;
-      if (database_connections_.IsDatabaseOpened(
-              origin_identifier, it->database_name)) {
-        db_file_size = database_connections_.GetOpenDatabaseSize(
-            origin_identifier, it->database_name);
-      } else {
-        db_file_size = GetDBFileSize(origin_identifier, it->database_name);
-      }
-      origin_info.SetDatabaseSize(it->database_name, db_file_size);
-      origin_info.SetDatabaseDescription(it->database_name, it->description);
-    }
-  }
-
-  return &origins_info_map_[origin_identifier];
-}
-
-int64 DatabaseTracker::GetDBFileSize(const std::string& origin_identifier,
-                                     const base::string16& database_name) {
-  base::FilePath db_file_name = GetFullDBFilePath(origin_identifier,
-                                                  database_name);
-  int64 db_file_size = 0;
-  if (!base::GetFileSize(db_file_name, &db_file_size))
-    db_file_size = 0;
-  return db_file_size;
-}
-
-int64 DatabaseTracker::SeedOpenDatabaseInfo(
-    const std::string& origin_id, const base::string16& name,
-    const base::string16& description) {
-  DCHECK(database_connections_.IsDatabaseOpened(origin_id, name));
-  int64 size = GetDBFileSize(origin_id, name);
-  database_connections_.SetOpenDatabaseSize(origin_id, name,  size);
-  CachedOriginInfo* info = MaybeGetCachedOriginInfo(origin_id, false);
-  if (info) {
-    info->SetDatabaseSize(name, size);
-    info->SetDatabaseDescription(name, description);
-  }
-  return size;
-}
-
-int64 DatabaseTracker::UpdateOpenDatabaseInfoAndNotify(
-    const std::string& origin_id, const base::string16& name,
-    const base::string16* opt_description) {
-  DCHECK(database_connections_.IsDatabaseOpened(origin_id, name));
-  int64 new_size = GetDBFileSize(origin_id, name);
-  int64 old_size = database_connections_.GetOpenDatabaseSize(origin_id, name);
-  CachedOriginInfo* info = MaybeGetCachedOriginInfo(origin_id, false);
-  if (info && opt_description)
-    info->SetDatabaseDescription(name, *opt_description);
-  if (old_size != new_size) {
-    database_connections_.SetOpenDatabaseSize(origin_id, name, new_size);
-    if (info)
-      info->SetDatabaseSize(name, new_size);
-    if (quota_manager_proxy_.get())
-      quota_manager_proxy_->NotifyStorageModified(
-          storage::QuotaClient::kDatabase,
-          storage::GetOriginFromIdentifier(origin_id),
-          storage::kStorageTypeTemporary,
-          new_size - old_size);
-    FOR_EACH_OBSERVER(Observer, observers_, OnDatabaseSizeChanged(
-        origin_id, name, new_size));
-  }
-  return new_size;
-}
-
-void DatabaseTracker::ScheduleDatabaseForDeletion(
-    const std::string& origin_identifier,
-    const base::string16& database_name) {
-  DCHECK(database_connections_.IsDatabaseOpened(origin_identifier,
-                                                database_name));
-  dbs_to_be_deleted_[origin_identifier].insert(database_name);
-  FOR_EACH_OBSERVER(Observer, observers_, OnDatabaseScheduledForDeletion(
-      origin_identifier, database_name));
-}
-
-void DatabaseTracker::ScheduleDatabasesForDeletion(
-    const DatabaseSet& databases,
-    const net::CompletionCallback& callback) {
-  DCHECK(!databases.empty());
-
-  if (!callback.is_null())
-    deletion_callbacks_.push_back(std::make_pair(callback, databases));
-  for (DatabaseSet::const_iterator ori = databases.begin();
-       ori != databases.end(); ++ori) {
-    for (std::set<base::string16>::const_iterator db = ori->second.begin();
-         db != ori->second.end(); ++db)
-      ScheduleDatabaseForDeletion(ori->first, *db);
-  }
-}
-
-int DatabaseTracker::DeleteDatabase(const std::string& origin_identifier,
-                                    const base::string16& database_name,
-                                    const net::CompletionCallback& callback) {
-  if (!LazyInit())
-    return net::ERR_FAILED;
-
-  if (database_connections_.IsDatabaseOpened(origin_identifier,
-                                             database_name)) {
-    if (!callback.is_null()) {
-      DatabaseSet set;
-      set[origin_identifier].insert(database_name);
-      deletion_callbacks_.push_back(std::make_pair(callback, set));
-    }
-    ScheduleDatabaseForDeletion(origin_identifier, database_name);
-    return net::ERR_IO_PENDING;
-  }
-  DeleteClosedDatabase(origin_identifier, database_name);
-  return net::OK;
-}
-
-int DatabaseTracker::DeleteDataModifiedSince(
-    const base::Time& cutoff,
-    const net::CompletionCallback& callback) {
-  if (!LazyInit())
-    return net::ERR_FAILED;
-
-  DatabaseSet to_be_deleted;
-
-  std::vector<std::string> origins_identifiers;
-  if (!databases_table_->GetAllOriginIdentifiers(&origins_identifiers))
-    return net::ERR_FAILED;
-  int rv = net::OK;
-  for (std::vector<std::string>::const_iterator ori =
-           origins_identifiers.begin();
-       ori != origins_identifiers.end(); ++ori) {
-    if (special_storage_policy_.get() &&
-        special_storage_policy_->IsStorageProtected(
-            storage::GetOriginFromIdentifier(*ori))) {
-      continue;
-    }
-
-    std::vector<DatabaseDetails> details;
-    if (!databases_table_->
-            GetAllDatabaseDetailsForOriginIdentifier(*ori, &details))
-      rv = net::ERR_FAILED;
-    for (std::vector<DatabaseDetails>::const_iterator db = details.begin();
-         db != details.end(); ++db) {
-      base::FilePath db_file = GetFullDBFilePath(*ori, db->database_name);
-      base::File::Info file_info;
-      base::GetFileInfo(db_file, &file_info);
-      if (file_info.last_modified < cutoff)
-        continue;
-
-      // Check if the database is opened by any renderer.
-      if (database_connections_.IsDatabaseOpened(*ori, db->database_name))
-        to_be_deleted[*ori].insert(db->database_name);
-      else
-        DeleteClosedDatabase(*ori, db->database_name);
-    }
-  }
-
-  if (rv != net::OK)
-    return rv;
-
-  if (!to_be_deleted.empty()) {
-    ScheduleDatabasesForDeletion(to_be_deleted, callback);
-    return net::ERR_IO_PENDING;
-  }
-  return net::OK;
-}
-
-int DatabaseTracker::DeleteDataForOrigin(
-    const std::string& origin, const net::CompletionCallback& callback) {
-  if (!LazyInit())
-    return net::ERR_FAILED;
-
-  DatabaseSet to_be_deleted;
-
-  std::vector<DatabaseDetails> details;
-  if (!databases_table_->
-          GetAllDatabaseDetailsForOriginIdentifier(origin, &details))
-    return net::ERR_FAILED;
-  for (std::vector<DatabaseDetails>::const_iterator db = details.begin();
-       db != details.end(); ++db) {
-    // Check if the database is opened by any renderer.
-    if (database_connections_.IsDatabaseOpened(origin, db->database_name))
-      to_be_deleted[origin].insert(db->database_name);
-    else
-      DeleteClosedDatabase(origin, db->database_name);
-  }
-
-  if (!to_be_deleted.empty()) {
-    ScheduleDatabasesForDeletion(to_be_deleted, callback);
-    return net::ERR_IO_PENDING;
-  }
-  return net::OK;
-}
-
-const base::File* DatabaseTracker::GetIncognitoFile(
-    const base::string16& vfs_file_name) const {
-  DCHECK(is_incognito_);
-  FileHandlesMap::const_iterator it =
-      incognito_file_handles_.find(vfs_file_name);
-  if (it != incognito_file_handles_.end())
-    return it->second;
-
-  return NULL;
-}
-
-const base::File* DatabaseTracker::SaveIncognitoFile(
-    const base::string16& vfs_file_name,
-    base::File file) {
-  DCHECK(is_incognito_);
-  if (!file.IsValid())
-    return NULL;
-
-  base::File* to_insert = new base::File(file.Pass());
-  std::pair<FileHandlesMap::iterator, bool> rv =
-      incognito_file_handles_.insert(std::make_pair(vfs_file_name, to_insert));
-  DCHECK(rv.second);
-  return rv.first->second;
-}
-
-void DatabaseTracker::CloseIncognitoFileHandle(
-    const base::string16& vfs_file_name) {
-  DCHECK(is_incognito_);
-  DCHECK(incognito_file_handles_.find(vfs_file_name) !=
-         incognito_file_handles_.end());
-
-  FileHandlesMap::iterator it = incognito_file_handles_.find(vfs_file_name);
-  if (it != incognito_file_handles_.end()) {
-    delete it->second;
-    incognito_file_handles_.erase(it);
-  }
-}
-
-bool DatabaseTracker::HasSavedIncognitoFileHandle(
-    const base::string16& vfs_file_name) const {
-  return (incognito_file_handles_.find(vfs_file_name) !=
-          incognito_file_handles_.end());
-}
-
-void DatabaseTracker::DeleteIncognitoDBDirectory() {
-  is_initialized_ = false;
-
-  for (FileHandlesMap::iterator it = incognito_file_handles_.begin();
-       it != incognito_file_handles_.end(); it++) {
-    delete it->second;
-  }
-
-  base::FilePath incognito_db_dir =
-      profile_path_.Append(kIncognitoDatabaseDirectoryName);
-  if (base::DirectoryExists(incognito_db_dir))
-    base::DeleteFile(incognito_db_dir, true);
-}
-
-void DatabaseTracker::ClearSessionOnlyOrigins() {
-  bool has_session_only_databases =
-      special_storage_policy_.get() &&
-      special_storage_policy_->HasSessionOnlyOrigins();
-
-  // Clearing only session-only databases, and there are none.
-  if (!has_session_only_databases)
-    return;
-
-  if (!LazyInit())
-    return;
-
-  std::vector<std::string> origin_identifiers;
-  GetAllOriginIdentifiers(&origin_identifiers);
-
-  for (std::vector<std::string>::iterator origin =
-           origin_identifiers.begin();
-       origin != origin_identifiers.end(); ++origin) {
-    GURL origin_url = storage::GetOriginFromIdentifier(*origin);
-    if (!special_storage_policy_->IsStorageSessionOnly(origin_url))
-      continue;
-    if (special_storage_policy_->IsStorageProtected(origin_url))
-      continue;
-    storage::OriginInfo origin_info;
-    std::vector<base::string16> databases;
-    GetOriginInfo(*origin, &origin_info);
-    origin_info.GetAllDatabaseNames(&databases);
-
-    for (std::vector<base::string16>::iterator database = databases.begin();
-         database != databases.end(); ++database) {
-      base::File file(GetFullDBFilePath(*origin, *database),
-                      base::File::FLAG_OPEN_ALWAYS |
-                          base::File::FLAG_SHARE_DELETE |
-                          base::File::FLAG_DELETE_ON_CLOSE |
-                          base::File::FLAG_READ);
-    }
-    DeleteOrigin(*origin, true);
-  }
-}
-
-
-void DatabaseTracker::Shutdown() {
-  DCHECK(db_tracker_thread_.get());
-  DCHECK(db_tracker_thread_->BelongsToCurrentThread());
-  if (shutting_down_) {
-    NOTREACHED();
-    return;
-  }
-  shutting_down_ = true;
-  if (is_incognito_)
-    DeleteIncognitoDBDirectory();
-  else if (!force_keep_session_state_)
-    ClearSessionOnlyOrigins();
-  CloseTrackerDatabaseAndClearCaches();
-}
-
-void DatabaseTracker::SetForceKeepSessionState() {
-  DCHECK(db_tracker_thread_.get());
-  if (!db_tracker_thread_->BelongsToCurrentThread()) {
-    db_tracker_thread_->PostTask(
-        FROM_HERE,
-        base::Bind(&DatabaseTracker::SetForceKeepSessionState, this));
-    return;
-  }
-  force_keep_session_state_ = true;
-}
-
-}  // namespace storage