Migrate webkit/browser/ to storage/browser/

webkit/browser/fileapi/obfuscated_file_util.cc

Index: webkit/browser/fileapi/obfuscated_file_util.cc
diff --git a/webkit/browser/fileapi/obfuscated_file_util.cc b/webkit/browser/fileapi/obfuscated_file_util.cc
deleted file mode 100644
index da58125325158bfc7c11ea4cd0a47922e315beff..0000000000000000000000000000000000000000
--- a/webkit/browser/fileapi/obfuscated_file_util.cc
+++ /dev/null
@@ -1,1424 +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/fileapi/obfuscated_file_util.h"
-
-#include <queue>
-#include <string>
-#include <vector>
-
-#include "base/file_util.h"
-#include "base/format_macros.h"
-#include "base/logging.h"
-#include "base/message_loop/message_loop.h"
-#include "base/metrics/histogram.h"
-#include "base/stl_util.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/stringprintf.h"
-#include "base/strings/sys_string_conversions.h"
-#include "base/strings/utf_string_conversions.h"
-#include "base/time/time.h"
-#include "url/gurl.h"
-#include "webkit/browser/fileapi/file_observers.h"
-#include "webkit/browser/fileapi/file_system_context.h"
-#include "webkit/browser/fileapi/file_system_operation_context.h"
-#include "webkit/browser/fileapi/file_system_url.h"
-#include "webkit/browser/fileapi/native_file_util.h"
-#include "webkit/browser/fileapi/sandbox_file_system_backend.h"
-#include "webkit/browser/fileapi/sandbox_isolated_origin_database.h"
-#include "webkit/browser/fileapi/sandbox_origin_database.h"
-#include "webkit/browser/fileapi/sandbox_prioritized_origin_database.h"
-#include "webkit/browser/fileapi/timed_task_helper.h"
-#include "webkit/browser/quota/quota_manager.h"
-#include "webkit/common/database/database_identifier.h"
-#include "webkit/common/fileapi/file_system_util.h"
-
-// Example of various paths:
-//   void ObfuscatedFileUtil::DoSomething(const FileSystemURL& url) {
-//     base::FilePath virtual_path = url.path();
-//     base::FilePath local_path = GetLocalFilePath(url);
-//
-//     NativeFileUtil::DoSomething(local_path);
-//     file_util::DoAnother(local_path);
-//  }
-
-namespace storage {
-
-namespace {
-
-typedef SandboxDirectoryDatabase::FileId FileId;
-typedef SandboxDirectoryDatabase::FileInfo FileInfo;
-
-void InitFileInfo(
-    SandboxDirectoryDatabase::FileInfo* file_info,
-    SandboxDirectoryDatabase::FileId parent_id,
-    const base::FilePath::StringType& file_name) {
-  DCHECK(file_info);
-  file_info->parent_id = parent_id;
-  file_info->name = file_name;
-}
-
-// Costs computed as per crbug.com/86114, based on the LevelDB implementation of
-// path storage under Linux.  It's not clear if that will differ on Windows, on
-// which base::FilePath uses wide chars [since they're converted to UTF-8 for
-// storage anyway], but as long as the cost is high enough that one can't cheat
-// on quota by storing data in paths, it doesn't need to be all that accurate.
-const int64 kPathCreationQuotaCost = 146;  // Bytes per inode, basically.
-const int64 kPathByteQuotaCost = 2;  // Bytes per byte of path length in UTF-8.
-
-int64 UsageForPath(size_t length) {
-  return kPathCreationQuotaCost +
-      static_cast<int64>(length) * kPathByteQuotaCost;
-}
-
-bool AllocateQuota(FileSystemOperationContext* context, int64 growth) {
-  if (context->allowed_bytes_growth() == storage::QuotaManager::kNoLimit)
-    return true;
-
-  int64 new_quota = context->allowed_bytes_growth() - growth;
-  if (growth > 0 && new_quota < 0)
-    return false;
-  context->set_allowed_bytes_growth(new_quota);
-  return true;
-}
-
-void UpdateUsage(
-    FileSystemOperationContext* context,
-    const FileSystemURL& url,
-    int64 growth) {
-  context->update_observers()->Notify(
-      &FileUpdateObserver::OnUpdate, MakeTuple(url, growth));
-}
-
-void TouchDirectory(SandboxDirectoryDatabase* db, FileId dir_id) {
-  DCHECK(db);
-  if (!db->UpdateModificationTime(dir_id, base::Time::Now()))
-    NOTREACHED();
-}
-
-enum IsolatedOriginStatus {
-  kIsolatedOriginMatch,
-  kIsolatedOriginDontMatch,
-  kIsolatedOriginStatusMax,
-};
-
-}  // namespace
-
-class ObfuscatedFileEnumerator
-    : public FileSystemFileUtil::AbstractFileEnumerator {
- public:
-  ObfuscatedFileEnumerator(
-      SandboxDirectoryDatabase* db,
-      FileSystemOperationContext* context,
-      ObfuscatedFileUtil* obfuscated_file_util,
-      const FileSystemURL& root_url,
-      bool recursive)
-      : db_(db),
-        context_(context),
-        obfuscated_file_util_(obfuscated_file_util),
-        root_url_(root_url),
-        recursive_(recursive),
-        current_file_id_(0) {
-    base::FilePath root_virtual_path = root_url.path();
-    FileId file_id;
-
-    if (!db_->GetFileWithPath(root_virtual_path, &file_id))
-      return;
-
-    FileRecord record = { file_id, root_virtual_path };
-    recurse_queue_.push(record);
-  }
-
-  virtual ~ObfuscatedFileEnumerator() {}
-
-  virtual base::FilePath Next() OVERRIDE {
-    ProcessRecurseQueue();
-    if (display_stack_.empty())
-      return base::FilePath();
-
-    current_file_id_ = display_stack_.back();
-    display_stack_.pop_back();
-
-    FileInfo file_info;
-    base::FilePath platform_file_path;
-    base::File::Error error =
-        obfuscated_file_util_->GetFileInfoInternal(
-            db_, context_, root_url_, current_file_id_,
-            &file_info, &current_platform_file_info_, &platform_file_path);
-    if (error != base::File::FILE_OK)
-      return Next();
-
-    base::FilePath virtual_path =
-        current_parent_virtual_path_.Append(file_info.name);
-    if (recursive_ && file_info.is_directory()) {
-      FileRecord record = { current_file_id_, virtual_path };
-      recurse_queue_.push(record);
-    }
-    return virtual_path;
-  }
-
-  virtual int64 Size() OVERRIDE {
-    return current_platform_file_info_.size;
-  }
-
-  virtual base::Time LastModifiedTime() OVERRIDE {
-    return current_platform_file_info_.last_modified;
-  }
-
-  virtual bool IsDirectory() OVERRIDE {
-    return current_platform_file_info_.is_directory;
-  }
-
- private:
-  typedef SandboxDirectoryDatabase::FileId FileId;
-  typedef SandboxDirectoryDatabase::FileInfo FileInfo;
-
-  struct FileRecord {
-    FileId file_id;
-    base::FilePath virtual_path;
-  };
-
-  void ProcessRecurseQueue() {
-    while (display_stack_.empty() && !recurse_queue_.empty()) {
-      FileRecord entry = recurse_queue_.front();
-      recurse_queue_.pop();
-      if (!db_->ListChildren(entry.file_id, &display_stack_)) {
-        display_stack_.clear();
-        return;
-      }
-      current_parent_virtual_path_ = entry.virtual_path;
-    }
-  }
-
-  SandboxDirectoryDatabase* db_;
-  FileSystemOperationContext* context_;
-  ObfuscatedFileUtil* obfuscated_file_util_;
-  FileSystemURL root_url_;
-  bool recursive_;
-
-  std::queue<FileRecord> recurse_queue_;
-  std::vector<FileId> display_stack_;
-  base::FilePath current_parent_virtual_path_;
-
-  FileId current_file_id_;
-  base::File::Info current_platform_file_info_;
-};
-
-class ObfuscatedOriginEnumerator
-    : public ObfuscatedFileUtil::AbstractOriginEnumerator {
- public:
-  typedef SandboxOriginDatabase::OriginRecord OriginRecord;
-  ObfuscatedOriginEnumerator(
-      SandboxOriginDatabaseInterface* origin_database,
-      const base::FilePath& base_file_path)
-      : base_file_path_(base_file_path) {
-    if (origin_database)
-      origin_database->ListAllOrigins(&origins_);
-  }
-
-  virtual ~ObfuscatedOriginEnumerator() {}
-
-  // Returns the next origin.  Returns empty if there are no more origins.
-  virtual GURL Next() OVERRIDE {
-    OriginRecord record;
-    if (!origins_.empty()) {
-      record = origins_.back();
-      origins_.pop_back();
-    }
-    current_ = record;
-    return storage::GetOriginFromIdentifier(record.origin);
-  }
-
-  // Returns the current origin's information.
-  virtual bool HasTypeDirectory(const std::string& type_string) const OVERRIDE {
-    if (current_.path.empty())
-      return false;
-    if (type_string.empty()) {
-      NOTREACHED();
-      return false;
-    }
-    base::FilePath path =
-        base_file_path_.Append(current_.path).AppendASCII(type_string);
-    return base::DirectoryExists(path);
-  }
-
- private:
-  std::vector<OriginRecord> origins_;
-  OriginRecord current_;
-  base::FilePath base_file_path_;
-};
-
-ObfuscatedFileUtil::ObfuscatedFileUtil(
-    storage::SpecialStoragePolicy* special_storage_policy,
-    const base::FilePath& file_system_directory,
-    leveldb::Env* env_override,
-    base::SequencedTaskRunner* file_task_runner,
-    const GetTypeStringForURLCallback& get_type_string_for_url,
-    const std::set<std::string>& known_type_strings,
-    SandboxFileSystemBackendDelegate* sandbox_delegate)
-    : special_storage_policy_(special_storage_policy),
-      file_system_directory_(file_system_directory),
-      env_override_(env_override),
-      db_flush_delay_seconds_(10 * 60),  // 10 mins.
-      file_task_runner_(file_task_runner),
-      get_type_string_for_url_(get_type_string_for_url),
-      known_type_strings_(known_type_strings),
-      sandbox_delegate_(sandbox_delegate) {
-}
-
-ObfuscatedFileUtil::~ObfuscatedFileUtil() {
-  DropDatabases();
-}
-
-base::File ObfuscatedFileUtil::CreateOrOpen(
-    FileSystemOperationContext* context,
-    const FileSystemURL& url, int file_flags) {
-  base::File file = CreateOrOpenInternal(context, url, file_flags);
-  if (file.IsValid() && file_flags & base::File::FLAG_WRITE &&
-      context->quota_limit_type() == storage::kQuotaLimitTypeUnlimited &&
-      sandbox_delegate_) {
-    sandbox_delegate_->StickyInvalidateUsageCache(url.origin(), url.type());
-  }
-  return file.Pass();
-}
-
-base::File::Error ObfuscatedFileUtil::EnsureFileExists(
-    FileSystemOperationContext* context,
-    const FileSystemURL& url,
-    bool* created) {
-  SandboxDirectoryDatabase* db = GetDirectoryDatabase(url, true);
-  if (!db)
-    return base::File::FILE_ERROR_FAILED;
-
-  FileId file_id;
-  if (db->GetFileWithPath(url.path(), &file_id)) {
-    FileInfo file_info;
-    if (!db->GetFileInfo(file_id, &file_info)) {
-      NOTREACHED();
-      return base::File::FILE_ERROR_FAILED;
-    }
-    if (file_info.is_directory())
-      return base::File::FILE_ERROR_NOT_A_FILE;
-    if (created)
-      *created = false;
-    return base::File::FILE_OK;
-  }
-  FileId parent_id;
-  if (!db->GetFileWithPath(VirtualPath::DirName(url.path()), &parent_id))
-    return base::File::FILE_ERROR_NOT_FOUND;
-
-  FileInfo file_info;
-  InitFileInfo(&file_info, parent_id,
-               VirtualPath::BaseName(url.path()).value());
-
-  int64 growth = UsageForPath(file_info.name.size());
-  if (!AllocateQuota(context, growth))
-    return base::File::FILE_ERROR_NO_SPACE;
-  base::File::Error error = CreateFile(context, base::FilePath(), url,
-                                       &file_info);
-  if (created && base::File::FILE_OK == error) {
-    *created = true;
-    UpdateUsage(context, url, growth);
-    context->change_observers()->Notify(
-        &FileChangeObserver::OnCreateFile, MakeTuple(url));
-  }
-  return error;
-}
-
-base::File::Error ObfuscatedFileUtil::CreateDirectory(
-    FileSystemOperationContext* context,
-    const FileSystemURL& url,
-    bool exclusive,
-    bool recursive) {
-  SandboxDirectoryDatabase* db = GetDirectoryDatabase(url, true);
-  if (!db)
-    return base::File::FILE_ERROR_FAILED;
-
-  FileId file_id;
-  if (db->GetFileWithPath(url.path(), &file_id)) {
-    FileInfo file_info;
-    if (exclusive)
-      return base::File::FILE_ERROR_EXISTS;
-    if (!db->GetFileInfo(file_id, &file_info)) {
-      NOTREACHED();
-      return base::File::FILE_ERROR_FAILED;
-    }
-    if (!file_info.is_directory())
-      return base::File::FILE_ERROR_NOT_A_DIRECTORY;
-    return base::File::FILE_OK;
-  }
-
-  std::vector<base::FilePath::StringType> components;
-  VirtualPath::GetComponents(url.path(), &components);
-  FileId parent_id = 0;
-  size_t index;
-  for (index = 0; index < components.size(); ++index) {
-    base::FilePath::StringType name = components[index];
-    if (name == FILE_PATH_LITERAL("/"))
-      continue;
-    if (!db->GetChildWithName(parent_id, name, &parent_id))
-      break;
-  }
-  if (!db->IsDirectory(parent_id))
-    return base::File::FILE_ERROR_NOT_A_DIRECTORY;
-  if (!recursive && components.size() - index > 1)
-    return base::File::FILE_ERROR_NOT_FOUND;
-  bool first = true;
-  for (; index < components.size(); ++index) {
-    FileInfo file_info;
-    file_info.name = components[index];
-    if (file_info.name == FILE_PATH_LITERAL("/"))
-      continue;
-    file_info.modification_time = base::Time::Now();
-    file_info.parent_id = parent_id;
-    int64 growth = UsageForPath(file_info.name.size());
-    if (!AllocateQuota(context, growth))
-      return base::File::FILE_ERROR_NO_SPACE;
-    base::File::Error error = db->AddFileInfo(file_info, &parent_id);
-    if (error != base::File::FILE_OK)
-      return error;
-    UpdateUsage(context, url, growth);
-    context->change_observers()->Notify(
-        &FileChangeObserver::OnCreateDirectory, MakeTuple(url));
-    if (first) {
-      first = false;
-      TouchDirectory(db, file_info.parent_id);
-    }
-  }
-  return base::File::FILE_OK;
-}
-
-base::File::Error ObfuscatedFileUtil::GetFileInfo(
-    FileSystemOperationContext* context,
-    const FileSystemURL& url,
-    base::File::Info* file_info,
-    base::FilePath* platform_file_path) {
-  SandboxDirectoryDatabase* db = GetDirectoryDatabase(url, false);
-  if (!db)
-    return base::File::FILE_ERROR_NOT_FOUND;
-  FileId file_id;
-  if (!db->GetFileWithPath(url.path(), &file_id))
-    return base::File::FILE_ERROR_NOT_FOUND;
-  FileInfo local_info;
-  return GetFileInfoInternal(db, context, url,
-                             file_id, &local_info,
-                             file_info, platform_file_path);
-}
-
-scoped_ptr<FileSystemFileUtil::AbstractFileEnumerator>
-    ObfuscatedFileUtil::CreateFileEnumerator(
-    FileSystemOperationContext* context,
-    const FileSystemURL& root_url) {
-  return CreateFileEnumerator(context, root_url, false /* recursive */);
-}
-
-base::File::Error ObfuscatedFileUtil::GetLocalFilePath(
-    FileSystemOperationContext* context,
-    const FileSystemURL& url,
-    base::FilePath* local_path) {
-  SandboxDirectoryDatabase* db = GetDirectoryDatabase(url, false);
-  if (!db)
-    return base::File::FILE_ERROR_NOT_FOUND;
-  FileId file_id;
-  if (!db->GetFileWithPath(url.path(), &file_id))
-    return base::File::FILE_ERROR_NOT_FOUND;
-  FileInfo file_info;
-  if (!db->GetFileInfo(file_id, &file_info) || file_info.is_directory()) {
-    NOTREACHED();
-    // Directories have no local file path.
-    return base::File::FILE_ERROR_NOT_FOUND;
-  }
-  *local_path = DataPathToLocalPath(url, file_info.data_path);
-
-  if (local_path->empty())
-    return base::File::FILE_ERROR_NOT_FOUND;
-  return base::File::FILE_OK;
-}
-
-base::File::Error ObfuscatedFileUtil::Touch(
-    FileSystemOperationContext* context,
-    const FileSystemURL& url,
-    const base::Time& last_access_time,
-    const base::Time& last_modified_time) {
-  SandboxDirectoryDatabase* db = GetDirectoryDatabase(url, false);
-  if (!db)
-    return base::File::FILE_ERROR_NOT_FOUND;
-  FileId file_id;
-  if (!db->GetFileWithPath(url.path(), &file_id))
-    return base::File::FILE_ERROR_NOT_FOUND;
-
-  FileInfo file_info;
-  if (!db->GetFileInfo(file_id, &file_info)) {
-    NOTREACHED();
-    return base::File::FILE_ERROR_FAILED;
-  }
-  if (file_info.is_directory()) {
-    if (!db->UpdateModificationTime(file_id, last_modified_time))
-      return base::File::FILE_ERROR_FAILED;
-    return base::File::FILE_OK;
-  }
-  return NativeFileUtil::Touch(
-      DataPathToLocalPath(url, file_info.data_path),
-      last_access_time, last_modified_time);
-}
-
-base::File::Error ObfuscatedFileUtil::Truncate(
-    FileSystemOperationContext* context,
-    const FileSystemURL& url,
-    int64 length) {
-  base::File::Info file_info;
-  base::FilePath local_path;
-  base::File::Error error =
-      GetFileInfo(context, url, &file_info, &local_path);
-  if (error != base::File::FILE_OK)
-    return error;
-
-  int64 growth = length - file_info.size;
-  if (!AllocateQuota(context, growth))
-    return base::File::FILE_ERROR_NO_SPACE;
-  error = NativeFileUtil::Truncate(local_path, length);
-  if (error == base::File::FILE_OK) {
-    UpdateUsage(context, url, growth);
-    context->change_observers()->Notify(
-        &FileChangeObserver::OnModifyFile, MakeTuple(url));
-  }
-  return error;
-}
-
-base::File::Error ObfuscatedFileUtil::CopyOrMoveFile(
-    FileSystemOperationContext* context,
-    const FileSystemURL& src_url,
-    const FileSystemURL& dest_url,
-    CopyOrMoveOption option,
-    bool copy) {
-  // Cross-filesystem copies and moves should be handled via CopyInForeignFile.
-  DCHECK(src_url.origin() == dest_url.origin());
-  DCHECK(src_url.type() == dest_url.type());
-
-  SandboxDirectoryDatabase* db = GetDirectoryDatabase(src_url, true);
-  if (!db)
-    return base::File::FILE_ERROR_FAILED;
-
-  FileId src_file_id;
-  if (!db->GetFileWithPath(src_url.path(), &src_file_id))
-    return base::File::FILE_ERROR_NOT_FOUND;
-
-  FileId dest_file_id;
-  bool overwrite = db->GetFileWithPath(dest_url.path(),
-                                       &dest_file_id);
-
-  FileInfo src_file_info;
-  base::File::Info src_platform_file_info;
-  base::FilePath src_local_path;
-  base::File::Error error = GetFileInfoInternal(
-      db, context, src_url, src_file_id,
-      &src_file_info, &src_platform_file_info, &src_local_path);
-  if (error != base::File::FILE_OK)
-    return error;
-  if (src_file_info.is_directory())
-    return base::File::FILE_ERROR_NOT_A_FILE;
-
-  FileInfo dest_file_info;
-  base::File::Info dest_platform_file_info;  // overwrite case only
-  base::FilePath dest_local_path;  // overwrite case only
-  if (overwrite) {
-    base::File::Error error = GetFileInfoInternal(
-        db, context, dest_url, dest_file_id,
-        &dest_file_info, &dest_platform_file_info, &dest_local_path);
-    if (error == base::File::FILE_ERROR_NOT_FOUND)
-      overwrite = false;  // fallback to non-overwrite case
-    else if (error != base::File::FILE_OK)
-      return error;
-    else if (dest_file_info.is_directory())
-      return base::File::FILE_ERROR_INVALID_OPERATION;
-  }
-  if (!overwrite) {
-    FileId dest_parent_id;
-    if (!db->GetFileWithPath(VirtualPath::DirName(dest_url.path()),
-                             &dest_parent_id)) {
-      return base::File::FILE_ERROR_NOT_FOUND;
-    }
-
-    dest_file_info = src_file_info;
-    dest_file_info.parent_id = dest_parent_id;
-    dest_file_info.name =
-        VirtualPath::BaseName(dest_url.path()).value();
-  }
-
-  int64 growth = 0;
-  if (copy)
-    growth += src_platform_file_info.size;
-  else
-    growth -= UsageForPath(src_file_info.name.size());
-  if (overwrite)
-    growth -= dest_platform_file_info.size;
-  else
-    growth += UsageForPath(dest_file_info.name.size());
-  if (!AllocateQuota(context, growth))
-    return base::File::FILE_ERROR_NO_SPACE;
-
-  /*
-   * Copy-with-overwrite
-   *  Just overwrite data file
-   * Copy-without-overwrite
-   *  Copy backing file
-   *  Create new metadata pointing to new backing file.
-   * Move-with-overwrite
-   *  transaction:
-   *    Remove source entry.
-   *    Point target entry to source entry's backing file.
-   *  Delete target entry's old backing file
-   * Move-without-overwrite
-   *  Just update metadata
-   */
-  error = base::File::FILE_ERROR_FAILED;
-  if (copy) {
-    if (overwrite) {
-      error = NativeFileUtil::CopyOrMoveFile(
-          src_local_path,
-          dest_local_path,
-          option,
-          storage::NativeFileUtil::CopyOrMoveModeForDestination(
-              dest_url, true /* copy */));
-    } else {  // non-overwrite
-      error = CreateFile(context, src_local_path, dest_url, &dest_file_info);
-    }
-  } else {
-    if (overwrite) {
-      if (db->OverwritingMoveFile(src_file_id, dest_file_id)) {
-        if (base::File::FILE_OK !=
-            NativeFileUtil::DeleteFile(dest_local_path))
-          LOG(WARNING) << "Leaked a backing file.";
-        error = base::File::FILE_OK;
-      } else {
-        error = base::File::FILE_ERROR_FAILED;
-      }
-    } else {  // non-overwrite
-      if (db->UpdateFileInfo(src_file_id, dest_file_info))
-        error = base::File::FILE_OK;
-      else
-        error = base::File::FILE_ERROR_FAILED;
-    }
-  }
-
-  if (error != base::File::FILE_OK)
-    return error;
-
-  if (overwrite) {
-    context->change_observers()->Notify(
-        &FileChangeObserver::OnModifyFile,
-        MakeTuple(dest_url));
-  } else {
-    context->change_observers()->Notify(
-        &FileChangeObserver::OnCreateFileFrom,
-        MakeTuple(dest_url, src_url));
-  }
-
-  if (!copy) {
-    context->change_observers()->Notify(
-        &FileChangeObserver::OnRemoveFile, MakeTuple(src_url));
-    TouchDirectory(db, src_file_info.parent_id);
-  }
-
-  TouchDirectory(db, dest_file_info.parent_id);
-
-  UpdateUsage(context, dest_url, growth);
-  return error;
-}
-
-base::File::Error ObfuscatedFileUtil::CopyInForeignFile(
-    FileSystemOperationContext* context,
-    const base::FilePath& src_file_path,
-    const FileSystemURL& dest_url) {
-  SandboxDirectoryDatabase* db = GetDirectoryDatabase(dest_url, true);
-  if (!db)
-    return base::File::FILE_ERROR_FAILED;
-
-  base::File::Info src_platform_file_info;
-  if (!base::GetFileInfo(src_file_path, &src_platform_file_info))
-    return base::File::FILE_ERROR_NOT_FOUND;
-
-  FileId dest_file_id;
-  bool overwrite = db->GetFileWithPath(dest_url.path(),
-                                       &dest_file_id);
-
-  FileInfo dest_file_info;
-  base::File::Info dest_platform_file_info;  // overwrite case only
-  if (overwrite) {
-    base::FilePath dest_local_path;
-    base::File::Error error = GetFileInfoInternal(
-        db, context, dest_url, dest_file_id,
-        &dest_file_info, &dest_platform_file_info, &dest_local_path);
-    if (error == base::File::FILE_ERROR_NOT_FOUND)
-      overwrite = false;  // fallback to non-overwrite case
-    else if (error != base::File::FILE_OK)
-      return error;
-    else if (dest_file_info.is_directory())
-      return base::File::FILE_ERROR_INVALID_OPERATION;
-  }
-  if (!overwrite) {
-    FileId dest_parent_id;
-    if (!db->GetFileWithPath(VirtualPath::DirName(dest_url.path()),
-                             &dest_parent_id)) {
-      return base::File::FILE_ERROR_NOT_FOUND;
-    }
-    if (!dest_file_info.is_directory())
-      return base::File::FILE_ERROR_FAILED;
-    InitFileInfo(&dest_file_info, dest_parent_id,
-                 VirtualPath::BaseName(dest_url.path()).value());
-  }
-
-  int64 growth = src_platform_file_info.size;
-  if (overwrite)
-    growth -= dest_platform_file_info.size;
-  else
-    growth += UsageForPath(dest_file_info.name.size());
-  if (!AllocateQuota(context, growth))
-    return base::File::FILE_ERROR_NO_SPACE;
-
-  base::File::Error error;
-  if (overwrite) {
-    base::FilePath dest_local_path =
-        DataPathToLocalPath(dest_url, dest_file_info.data_path);
-    error = NativeFileUtil::CopyOrMoveFile(
-        src_file_path,
-        dest_local_path,
-        FileSystemOperation::OPTION_NONE,
-        storage::NativeFileUtil::CopyOrMoveModeForDestination(dest_url,
-                                                              true /* copy */));
-  } else {
-    error = CreateFile(context, src_file_path, dest_url, &dest_file_info);
-  }
-
-  if (error != base::File::FILE_OK)
-    return error;
-
-  if (overwrite) {
-    context->change_observers()->Notify(
-        &FileChangeObserver::OnModifyFile, MakeTuple(dest_url));
-  } else {
-    context->change_observers()->Notify(
-        &FileChangeObserver::OnCreateFile, MakeTuple(dest_url));
-  }
-
-  UpdateUsage(context, dest_url, growth);
-  TouchDirectory(db, dest_file_info.parent_id);
-  return base::File::FILE_OK;
-}
-
-base::File::Error ObfuscatedFileUtil::DeleteFile(
-    FileSystemOperationContext* context,
-    const FileSystemURL& url) {
-  SandboxDirectoryDatabase* db = GetDirectoryDatabase(url, true);
-  if (!db)
-    return base::File::FILE_ERROR_FAILED;
-  FileId file_id;
-  if (!db->GetFileWithPath(url.path(), &file_id))
-    return base::File::FILE_ERROR_NOT_FOUND;
-
-  FileInfo file_info;
-  base::File::Info platform_file_info;
-  base::FilePath local_path;
-  base::File::Error error = GetFileInfoInternal(
-      db, context, url, file_id, &file_info, &platform_file_info, &local_path);
-  if (error != base::File::FILE_ERROR_NOT_FOUND &&
-      error != base::File::FILE_OK)
-    return error;
-
-  if (file_info.is_directory())
-    return base::File::FILE_ERROR_NOT_A_FILE;
-
-  int64 growth = -UsageForPath(file_info.name.size()) - platform_file_info.size;
-  AllocateQuota(context, growth);
-  if (!db->RemoveFileInfo(file_id)) {
-    NOTREACHED();
-    return base::File::FILE_ERROR_FAILED;
-  }
-  UpdateUsage(context, url, growth);
-  TouchDirectory(db, file_info.parent_id);
-
-  context->change_observers()->Notify(
-      &FileChangeObserver::OnRemoveFile, MakeTuple(url));
-
-  if (error == base::File::FILE_ERROR_NOT_FOUND)
-    return base::File::FILE_OK;
-
-  error = NativeFileUtil::DeleteFile(local_path);
-  if (base::File::FILE_OK != error)
-    LOG(WARNING) << "Leaked a backing file.";
-  return base::File::FILE_OK;
-}
-
-base::File::Error ObfuscatedFileUtil::DeleteDirectory(
-    FileSystemOperationContext* context,
-    const FileSystemURL& url) {
-  SandboxDirectoryDatabase* db = GetDirectoryDatabase(url, true);
-  if (!db)
-    return base::File::FILE_ERROR_FAILED;
-
-  FileId file_id;
-  if (!db->GetFileWithPath(url.path(), &file_id))
-    return base::File::FILE_ERROR_NOT_FOUND;
-  FileInfo file_info;
-  if (!db->GetFileInfo(file_id, &file_info)) {
-    NOTREACHED();
-    return base::File::FILE_ERROR_FAILED;
-  }
-  if (!file_info.is_directory())
-    return base::File::FILE_ERROR_NOT_A_DIRECTORY;
-  if (!db->RemoveFileInfo(file_id))
-    return base::File::FILE_ERROR_NOT_EMPTY;
-  int64 growth = -UsageForPath(file_info.name.size());
-  AllocateQuota(context, growth);
-  UpdateUsage(context, url, growth);
-  TouchDirectory(db, file_info.parent_id);
-  context->change_observers()->Notify(
-      &FileChangeObserver::OnRemoveDirectory, MakeTuple(url));
-  return base::File::FILE_OK;
-}
-
-storage::ScopedFile ObfuscatedFileUtil::CreateSnapshotFile(
-    FileSystemOperationContext* context,
-    const FileSystemURL& url,
-    base::File::Error* error,
-    base::File::Info* file_info,
-    base::FilePath* platform_path) {
-  // We're just returning the local file information.
-  *error = GetFileInfo(context, url, file_info, platform_path);
-  if (*error == base::File::FILE_OK && file_info->is_directory) {
-    *file_info = base::File::Info();
-    *error = base::File::FILE_ERROR_NOT_A_FILE;
-  }
-  return storage::ScopedFile();
-}
-
-scoped_ptr<FileSystemFileUtil::AbstractFileEnumerator>
-    ObfuscatedFileUtil::CreateFileEnumerator(
-    FileSystemOperationContext* context,
-    const FileSystemURL& root_url,
-    bool recursive) {
-  SandboxDirectoryDatabase* db = GetDirectoryDatabase(root_url, false);
-  if (!db) {
-    return scoped_ptr<AbstractFileEnumerator>(new EmptyFileEnumerator());
-  }
-  return scoped_ptr<AbstractFileEnumerator>(
-      new ObfuscatedFileEnumerator(db, context, this, root_url, recursive));
-}
-
-bool ObfuscatedFileUtil::IsDirectoryEmpty(
-    FileSystemOperationContext* context,
-    const FileSystemURL& url) {
-  SandboxDirectoryDatabase* db = GetDirectoryDatabase(url, false);
-  if (!db)
-    return true;  // Not a great answer, but it's what others do.
-  FileId file_id;
-  if (!db->GetFileWithPath(url.path(), &file_id))
-    return true;  // Ditto.
-  FileInfo file_info;
-  if (!db->GetFileInfo(file_id, &file_info)) {
-    DCHECK(!file_id);
-    // It's the root directory and the database hasn't been initialized yet.
-    return true;
-  }
-  if (!file_info.is_directory())
-    return true;
-  std::vector<FileId> children;
-  // TODO(ericu): This could easily be made faster with help from the database.
-  if (!db->ListChildren(file_id, &children))
-    return true;
-  return children.empty();
-}
-
-base::FilePath ObfuscatedFileUtil::GetDirectoryForOriginAndType(
-    const GURL& origin,
-    const std::string& type_string,
-    bool create,
-    base::File::Error* error_code) {
-  base::FilePath origin_dir = GetDirectoryForOrigin(origin, create, error_code);
-  if (origin_dir.empty())
-    return base::FilePath();
-  if (type_string.empty())
-    return origin_dir;
-  base::FilePath path = origin_dir.AppendASCII(type_string);
-  base::File::Error error = base::File::FILE_OK;
-  if (!base::DirectoryExists(path) &&
-      (!create || !base::CreateDirectory(path))) {
-    error = create ?
-          base::File::FILE_ERROR_FAILED :
-          base::File::FILE_ERROR_NOT_FOUND;
-  }
-
-  if (error_code)
-    *error_code = error;
-  return path;
-}
-
-bool ObfuscatedFileUtil::DeleteDirectoryForOriginAndType(
-    const GURL& origin,
-    const std::string& type_string) {
-  base::File::Error error = base::File::FILE_OK;
-  base::FilePath origin_type_path = GetDirectoryForOriginAndType(
-      origin, type_string, false, &error);
-  if (origin_type_path.empty())
-    return true;
-  if (error != base::File::FILE_ERROR_NOT_FOUND) {
-    // TODO(dmikurube): Consider the return value of DestroyDirectoryDatabase.
-    // We ignore its error now since 1) it doesn't matter the final result, and
-    // 2) it always returns false in Windows because of LevelDB's
-    // implementation.
-    // Information about failure would be useful for debugging.
-    if (!type_string.empty())
-      DestroyDirectoryDatabase(origin, type_string);
-    if (!base::DeleteFile(origin_type_path, true /* recursive */))
-      return false;
-  }
-
-  base::FilePath origin_path = VirtualPath::DirName(origin_type_path);
-  DCHECK_EQ(origin_path.value(),
-            GetDirectoryForOrigin(origin, false, NULL).value());
-
-  if (!type_string.empty()) {
-    // At this point we are sure we had successfully deleted the origin/type
-    // directory (i.e. we're ready to just return true).
-    // See if we have other directories in this origin directory.
-    for (std::set<std::string>::iterator iter = known_type_strings_.begin();
-         iter != known_type_strings_.end();
-         ++iter) {
-      if (*iter == type_string)
-        continue;
-      if (base::DirectoryExists(origin_path.AppendASCII(*iter))) {
-        // Other type's directory exists; just return true here.
-        return true;
-      }
-    }
-  }
-
-  // No other directories seem exist. Try deleting the entire origin directory.
-  InitOriginDatabase(origin, false);
-  if (origin_database_) {
-    origin_database_->RemovePathForOrigin(
-        storage::GetIdentifierFromOrigin(origin));
-  }
-  if (!base::DeleteFile(origin_path, true /* recursive */))
-    return false;
-
-  return true;
-}
-
-ObfuscatedFileUtil::AbstractOriginEnumerator*
-ObfuscatedFileUtil::CreateOriginEnumerator() {
-  std::vector<SandboxOriginDatabase::OriginRecord> origins;
-
-  InitOriginDatabase(GURL(), false);
-  return new ObfuscatedOriginEnumerator(
-      origin_database_.get(), file_system_directory_);
-}
-
-bool ObfuscatedFileUtil::DestroyDirectoryDatabase(
-    const GURL& origin,
-    const std::string& type_string) {
-  std::string key = GetDirectoryDatabaseKey(origin, type_string);
-  if (key.empty())
-    return true;
-  DirectoryMap::iterator iter = directories_.find(key);
-  if (iter != directories_.end()) {
-    SandboxDirectoryDatabase* database = iter->second;
-    directories_.erase(iter);
-    delete database;
-  }
-
-  base::File::Error error = base::File::FILE_OK;
-  base::FilePath path = GetDirectoryForOriginAndType(
-      origin, type_string, false, &error);
-  if (path.empty() || error == base::File::FILE_ERROR_NOT_FOUND)
-    return true;
-  return SandboxDirectoryDatabase::DestroyDatabase(path, env_override_);
-}
-
-// static
-int64 ObfuscatedFileUtil::ComputeFilePathCost(const base::FilePath& path) {
-  return UsageForPath(VirtualPath::BaseName(path).value().size());
-}
-
-void ObfuscatedFileUtil::MaybePrepopulateDatabase(
-    const std::vector<std::string>& type_strings_to_prepopulate) {
-  SandboxPrioritizedOriginDatabase database(file_system_directory_,
-                                            env_override_);
-  std::string origin_string = database.GetPrimaryOrigin();
-  if (origin_string.empty() || !database.HasOriginPath(origin_string))
-    return;
-  const GURL origin = storage::GetOriginFromIdentifier(origin_string);
-
-  // Prepopulate the directory database(s) if and only if this instance
-  // has primary origin and the directory database is already there.
-  for (size_t i = 0; i < type_strings_to_prepopulate.size(); ++i) {
-    const std::string type_string = type_strings_to_prepopulate[i];
-    // Only handles known types.
-    if (!ContainsKey(known_type_strings_, type_string))
-      continue;
-    base::File::Error error = base::File::FILE_ERROR_FAILED;
-    base::FilePath path = GetDirectoryForOriginAndType(
-        origin, type_string, false, &error);
-    if (error != base::File::FILE_OK)
-      continue;
-    scoped_ptr<SandboxDirectoryDatabase> db(
-        new SandboxDirectoryDatabase(path, env_override_));
-    if (db->Init(SandboxDirectoryDatabase::FAIL_ON_CORRUPTION)) {
-      directories_[GetDirectoryDatabaseKey(origin, type_string)] = db.release();
-      MarkUsed();
-      // Don't populate more than one database, as it may rather hurt
-      // performance.
-      break;
-    }
-  }
-}
-
-base::FilePath ObfuscatedFileUtil::GetDirectoryForURL(
-    const FileSystemURL& url,
-    bool create,
-    base::File::Error* error_code) {
-  return GetDirectoryForOriginAndType(
-      url.origin(), CallGetTypeStringForURL(url), create, error_code);
-}
-
-std::string ObfuscatedFileUtil::CallGetTypeStringForURL(
-    const FileSystemURL& url) {
-  DCHECK(!get_type_string_for_url_.is_null());
-  return get_type_string_for_url_.Run(url);
-}
-
-base::File::Error ObfuscatedFileUtil::GetFileInfoInternal(
-    SandboxDirectoryDatabase* db,
-    FileSystemOperationContext* context,
-    const FileSystemURL& url,
-    FileId file_id,
-    FileInfo* local_info,
-    base::File::Info* file_info,
-    base::FilePath* platform_file_path) {
-  DCHECK(db);
-  DCHECK(context);
-  DCHECK(file_info);
-  DCHECK(platform_file_path);
-
-  if (!db->GetFileInfo(file_id, local_info)) {
-    NOTREACHED();
-    return base::File::FILE_ERROR_FAILED;
-  }
-
-  if (local_info->is_directory()) {
-    file_info->size = 0;
-    file_info->is_directory = true;
-    file_info->is_symbolic_link = false;
-    file_info->last_modified = local_info->modification_time;
-    *platform_file_path = base::FilePath();
-    // We don't fill in ctime or atime.
-    return base::File::FILE_OK;
-  }
-  if (local_info->data_path.empty())
-    return base::File::FILE_ERROR_INVALID_OPERATION;
-  base::FilePath local_path = DataPathToLocalPath(url, local_info->data_path);
-  base::File::Error error = NativeFileUtil::GetFileInfo(
-      local_path, file_info);
-  // We should not follow symbolic links in sandboxed file system.
-  if (base::IsLink(local_path)) {
-    LOG(WARNING) << "Found a symbolic file.";
-    error = base::File::FILE_ERROR_NOT_FOUND;
-  }
-  if (error == base::File::FILE_OK) {
-    *platform_file_path = local_path;
-  } else if (error == base::File::FILE_ERROR_NOT_FOUND) {
-    LOG(WARNING) << "Lost a backing file.";
-    InvalidateUsageCache(context, url.origin(), url.type());
-    if (!db->RemoveFileInfo(file_id))
-      return base::File::FILE_ERROR_FAILED;
-  }
-  return error;
-}
-
-base::File ObfuscatedFileUtil::CreateAndOpenFile(
-    FileSystemOperationContext* context,
-    const FileSystemURL& dest_url,
-    FileInfo* dest_file_info, int file_flags) {
-  SandboxDirectoryDatabase* db = GetDirectoryDatabase(dest_url, true);
-
-  base::FilePath root, dest_local_path;
-  base::File::Error error = GenerateNewLocalPath(db, context, dest_url, &root,
-                                                 &dest_local_path);
-  if (error != base::File::FILE_OK)
-    return base::File(error);
-
-  if (base::PathExists(dest_local_path)) {
-    if (!base::DeleteFile(dest_local_path, true /* recursive */))
-      return base::File(base::File::FILE_ERROR_FAILED);
-    LOG(WARNING) << "A stray file detected";
-    InvalidateUsageCache(context, dest_url.origin(), dest_url.type());
-  }
-
-  base::File file = NativeFileUtil::CreateOrOpen(dest_local_path, file_flags);
-  if (!file.IsValid())
-    return file.Pass();
-
-  if (!file.created()) {
-    file.Close();
-    base::DeleteFile(dest_local_path, false /* recursive */);
-    return base::File(base::File::FILE_ERROR_FAILED);
-  }
-
-  error = CommitCreateFile(root, dest_local_path, db, dest_file_info);
-  if (error != base::File::FILE_OK) {
-    file.Close();
-    base::DeleteFile(dest_local_path, false /* recursive */);
-    return base::File(error);
-  }
-
-  return file.Pass();
-}
-
-base::File::Error ObfuscatedFileUtil::CreateFile(
-    FileSystemOperationContext* context,
-    const base::FilePath& src_file_path,
-    const FileSystemURL& dest_url,
-    FileInfo* dest_file_info) {
-  SandboxDirectoryDatabase* db = GetDirectoryDatabase(dest_url, true);
-
-  base::FilePath root, dest_local_path;
-  base::File::Error error = GenerateNewLocalPath(db, context, dest_url, &root,
-                                                 &dest_local_path);
-  if (error != base::File::FILE_OK)
-    return error;
-
-  bool created = false;
-  if (src_file_path.empty()) {
-    if (base::PathExists(dest_local_path)) {
-      if (!base::DeleteFile(dest_local_path, true /* recursive */))
-        return base::File::FILE_ERROR_FAILED;
-      LOG(WARNING) << "A stray file detected";
-      InvalidateUsageCache(context, dest_url.origin(), dest_url.type());
-    }
-
-    error = NativeFileUtil::EnsureFileExists(dest_local_path, &created);
-  } else {
-    error = NativeFileUtil::CopyOrMoveFile(
-        src_file_path,
-        dest_local_path,
-        FileSystemOperation::OPTION_NONE,
-        storage::NativeFileUtil::CopyOrMoveModeForDestination(dest_url,
-                                                              true /* copy */));
-    created = true;
-  }
-  if (error != base::File::FILE_OK)
-    return error;
-  if (!created)
-    return base::File::FILE_ERROR_FAILED;
-
-  return CommitCreateFile(root, dest_local_path, db, dest_file_info);
-}
-
-base::File::Error ObfuscatedFileUtil::CommitCreateFile(
-    const base::FilePath& root,
-    const base::FilePath& local_path,
-    SandboxDirectoryDatabase* db,
-    FileInfo* dest_file_info) {
-  // This removes the root, including the trailing slash, leaving a relative
-  // path.
-  dest_file_info->data_path = base::FilePath(
-      local_path.value().substr(root.value().length() + 1));
-
-  FileId file_id;
-  base::File::Error error = db->AddFileInfo(*dest_file_info, &file_id);
-  if (error != base::File::FILE_OK)
-    return error;
-
-  TouchDirectory(db, dest_file_info->parent_id);
-  return base::File::FILE_OK;
-}
-
-base::FilePath ObfuscatedFileUtil::DataPathToLocalPath(
-    const FileSystemURL& url, const base::FilePath& data_path) {
-  base::File::Error error = base::File::FILE_OK;
-  base::FilePath root = GetDirectoryForURL(url, false, &error);
-  if (error != base::File::FILE_OK)
-    return base::FilePath();
-  return root.Append(data_path);
-}
-
-std::string ObfuscatedFileUtil::GetDirectoryDatabaseKey(
-    const GURL& origin, const std::string& type_string) {
-  if (type_string.empty()) {
-    LOG(WARNING) << "Unknown filesystem type requested:" << type_string;
-    return std::string();
-  }
-  // For isolated origin we just use a type string as a key.
-  return storage::GetIdentifierFromOrigin(origin) + type_string;
-}
-
-// TODO(ericu): How to do the whole validation-without-creation thing?
-// We may not have quota even to create the database.
-// Ah, in that case don't even get here?
-// Still doesn't answer the quota issue, though.
-SandboxDirectoryDatabase* ObfuscatedFileUtil::GetDirectoryDatabase(
-    const FileSystemURL& url, bool create) {
-  std::string key = GetDirectoryDatabaseKey(
-      url.origin(), CallGetTypeStringForURL(url));
-  if (key.empty())
-    return NULL;
-
-  DirectoryMap::iterator iter = directories_.find(key);
-  if (iter != directories_.end()) {
-    MarkUsed();
-    return iter->second;
-  }
-
-  base::File::Error error = base::File::FILE_OK;
-  base::FilePath path = GetDirectoryForURL(url, create, &error);
-  if (error != base::File::FILE_OK) {
-    LOG(WARNING) << "Failed to get origin+type directory: "
-                 << url.DebugString() << " error:" << error;
-    return NULL;
-  }
-  MarkUsed();
-  SandboxDirectoryDatabase* database =
-      new SandboxDirectoryDatabase(path, env_override_);
-  directories_[key] = database;
-  return database;
-}
-
-base::FilePath ObfuscatedFileUtil::GetDirectoryForOrigin(
-    const GURL& origin, bool create, base::File::Error* error_code) {
-  if (!InitOriginDatabase(origin, create)) {
-    if (error_code) {
-      *error_code = create ?
-          base::File::FILE_ERROR_FAILED :
-          base::File::FILE_ERROR_NOT_FOUND;
-    }
-    return base::FilePath();
-  }
-  base::FilePath directory_name;
-  std::string id = storage::GetIdentifierFromOrigin(origin);
-
-  bool exists_in_db = origin_database_->HasOriginPath(id);
-  if (!exists_in_db && !create) {
-    if (error_code)
-      *error_code = base::File::FILE_ERROR_NOT_FOUND;
-    return base::FilePath();
-  }
-  if (!origin_database_->GetPathForOrigin(id, &directory_name)) {
-    if (error_code)
-      *error_code = base::File::FILE_ERROR_FAILED;
-    return base::FilePath();
-  }
-
-  base::FilePath path = file_system_directory_.Append(directory_name);
-  bool exists_in_fs = base::DirectoryExists(path);
-  if (!exists_in_db && exists_in_fs) {
-    if (!base::DeleteFile(path, true)) {
-      if (error_code)
-        *error_code = base::File::FILE_ERROR_FAILED;
-      return base::FilePath();
-    }
-    exists_in_fs = false;
-  }
-
-  if (!exists_in_fs) {
-    if (!create || !base::CreateDirectory(path)) {
-      if (error_code)
-        *error_code = create ?
-            base::File::FILE_ERROR_FAILED :
-            base::File::FILE_ERROR_NOT_FOUND;
-      return base::FilePath();
-    }
-  }
-
-  if (error_code)
-    *error_code = base::File::FILE_OK;
-
-  return path;
-}
-
-void ObfuscatedFileUtil::InvalidateUsageCache(
-    FileSystemOperationContext* context,
-    const GURL& origin,
-    FileSystemType type) {
-  if (sandbox_delegate_)
-    sandbox_delegate_->InvalidateUsageCache(origin, type);
-}
-
-void ObfuscatedFileUtil::MarkUsed() {
-  if (!timer_)
-    timer_.reset(new TimedTaskHelper(file_task_runner_.get()));
-
-  if (timer_->IsRunning()) {
-    timer_->Reset();
-  } else {
-    timer_->Start(FROM_HERE,
-                  base::TimeDelta::FromSeconds(db_flush_delay_seconds_),
-                  base::Bind(&ObfuscatedFileUtil::DropDatabases,
-                             base::Unretained(this)));
-  }
-}
-
-void ObfuscatedFileUtil::DropDatabases() {
-  origin_database_.reset();
-  STLDeleteContainerPairSecondPointers(
-      directories_.begin(), directories_.end());
-  directories_.clear();
-  timer_.reset();
-}
-
-bool ObfuscatedFileUtil::InitOriginDatabase(const GURL& origin_hint,
-                                            bool create) {
-  if (origin_database_)
-    return true;
-
-  if (!create && !base::DirectoryExists(file_system_directory_))
-    return false;
-  if (!base::CreateDirectory(file_system_directory_)) {
-    LOG(WARNING) << "Failed to create FileSystem directory: " <<
-        file_system_directory_.value();
-    return false;
-  }
-
-  SandboxPrioritizedOriginDatabase* prioritized_origin_database =
-      new SandboxPrioritizedOriginDatabase(file_system_directory_,
-                                           env_override_);
-  origin_database_.reset(prioritized_origin_database);
-
-  if (origin_hint.is_empty() || !HasIsolatedStorage(origin_hint))
-    return true;
-
-  const std::string isolated_origin_string =
-      storage::GetIdentifierFromOrigin(origin_hint);
-
-  // TODO(kinuko): Deprecate this after a few release cycles, e.g. around M33.
-  base::FilePath isolated_origin_dir = file_system_directory_.Append(
-      SandboxIsolatedOriginDatabase::kObsoleteOriginDirectory);
-  if (base::DirectoryExists(isolated_origin_dir) &&
-      prioritized_origin_database->GetSandboxOriginDatabase()) {
-    SandboxIsolatedOriginDatabase::MigrateBackFromObsoleteOriginDatabase(
-        isolated_origin_string,
-        file_system_directory_,
-        prioritized_origin_database->GetSandboxOriginDatabase());
-  }
-
-  prioritized_origin_database->InitializePrimaryOrigin(
-      isolated_origin_string);
-
-  return true;
-}
-
-base::File::Error ObfuscatedFileUtil::GenerateNewLocalPath(
-    SandboxDirectoryDatabase* db,
-    FileSystemOperationContext* context,
-    const FileSystemURL& url,
-    base::FilePath* root,
-    base::FilePath* local_path) {
-  DCHECK(local_path);
-  int64 number;
-  if (!db || !db->GetNextInteger(&number))
-    return base::File::FILE_ERROR_FAILED;
-
-  base::File::Error error = base::File::FILE_OK;
-  *root = GetDirectoryForURL(url, false, &error);
-  if (error != base::File::FILE_OK)
-    return error;
-
-  // We use the third- and fourth-to-last digits as the directory.
-  int64 directory_number = number % 10000 / 100;
-  base::FilePath new_local_path = root->AppendASCII(
-      base::StringPrintf("%02" PRId64, directory_number));
-
-  error = NativeFileUtil::CreateDirectory(
-      new_local_path, false /* exclusive */, false /* recursive */);
-  if (error != base::File::FILE_OK)
-    return error;
-
-  *local_path =
-      new_local_path.AppendASCII(base::StringPrintf("%08" PRId64, number));
-  return base::File::FILE_OK;
-}
-
-base::File ObfuscatedFileUtil::CreateOrOpenInternal(
-    FileSystemOperationContext* context,
-    const FileSystemURL& url, int file_flags) {
-  DCHECK(!(file_flags & (base::File::FLAG_DELETE_ON_CLOSE |
-        base::File::FLAG_HIDDEN | base::File::FLAG_EXCLUSIVE_READ |
-        base::File::FLAG_EXCLUSIVE_WRITE)));
-  SandboxDirectoryDatabase* db = GetDirectoryDatabase(url, true);
-  if (!db)
-    return base::File(base::File::FILE_ERROR_FAILED);
-  FileId file_id;
-  if (!db->GetFileWithPath(url.path(), &file_id)) {
-    // The file doesn't exist.
-    if (!(file_flags & (base::File::FLAG_CREATE |
-        base::File::FLAG_CREATE_ALWAYS | base::File::FLAG_OPEN_ALWAYS))) {
-      return base::File(base::File::FILE_ERROR_NOT_FOUND);
-    }
-    FileId parent_id;
-    if (!db->GetFileWithPath(VirtualPath::DirName(url.path()), &parent_id))
-      return base::File(base::File::FILE_ERROR_NOT_FOUND);
-    FileInfo file_info;
-    InitFileInfo(&file_info, parent_id,
-                 VirtualPath::BaseName(url.path()).value());
-
-    int64 growth = UsageForPath(file_info.name.size());
-    if (!AllocateQuota(context, growth))
-      return base::File(base::File::FILE_ERROR_NO_SPACE);
-    base::File file = CreateAndOpenFile(context, url, &file_info, file_flags);
-    if (file.IsValid()) {
-      UpdateUsage(context, url, growth);
-      context->change_observers()->Notify(
-          &FileChangeObserver::OnCreateFile, MakeTuple(url));
-    }
-    return file.Pass();
-  }
-
-  if (file_flags & base::File::FLAG_CREATE)
-    return base::File(base::File::FILE_ERROR_EXISTS);
-
-  base::File::Info platform_file_info;
-  base::FilePath local_path;
-  FileInfo file_info;
-  base::File::Error error = GetFileInfoInternal(
-      db, context, url, file_id, &file_info, &platform_file_info, &local_path);
-  if (error != base::File::FILE_OK)
-    return base::File(error);
-  if (file_info.is_directory())
-    return base::File(base::File::FILE_ERROR_NOT_A_FILE);
-
-  int64 delta = 0;
-  if (file_flags & (base::File::FLAG_CREATE_ALWAYS |
-                    base::File::FLAG_OPEN_TRUNCATED)) {
-    // The file exists and we're truncating.
-    delta = -platform_file_info.size;
-    AllocateQuota(context, delta);
-  }
-
-  base::File file = NativeFileUtil::CreateOrOpen(local_path, file_flags);
-  if (!file.IsValid()) {
-    error = file.error_details();
-    if (error == base::File::FILE_ERROR_NOT_FOUND) {
-      // TODO(tzik): Also invalidate on-memory usage cache in UsageTracker.
-      // TODO(tzik): Delete database entry after ensuring the file lost.
-      InvalidateUsageCache(context, url.origin(), url.type());
-      LOG(WARNING) << "Lost a backing file.";
-      return base::File(base::File::FILE_ERROR_FAILED);
-    }
-    return file.Pass();
-  }
-
-  // If truncating we need to update the usage.
-  if (delta) {
-    UpdateUsage(context, url, delta);
-    context->change_observers()->Notify(
-        &FileChangeObserver::OnModifyFile, MakeTuple(url));
-  }
-  return file.Pass();
-}
-
-bool ObfuscatedFileUtil::HasIsolatedStorage(const GURL& origin) {
-  return special_storage_policy_.get() &&
-      special_storage_policy_->HasIsolatedStorage(origin);
-}
-
-}  // namespace storage