Add database recovery for FileSystemOriginDatabase

webkit/fileapi/file_system_directory_database.h

 // Copyright (c) 2011 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.
 
 #ifndef WEBKIT_FILEAPI_FILE_SYSTEM_DIRECTORY_DATABASE_H_
 #define WEBKIT_FILEAPI_FILE_SYSTEM_DIRECTORY_DATABASE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 69 matching lines @@
   bool OverwritingMoveFile(FileId src_file_id, FileId dest_file_id);
 
   // This produces the series 0, 1, 2..., starting at 0 when the underlying
   // filesystem is first created, and maintaining state across
   // creation/destruction of FileSystemDirectoryDatabase objects.
   bool GetNextInteger(int64* next);
 
   static bool DestroyDatabase(const FilePath& path);
 
  private:
-  bool Init();
+  enum RecoveryOption {
+    DELETE_ON_CORRUPTION,
+    FAIL_ON_CORRUPTION,

[ericu, 2012/03/19 16:50:05]

We should also attempt to repair here before deleting.

[tzik, 2012/03/21 08:59:21]

To avoid web apps facing inconsistency, we can't simply use RepairDB, like the
origins database.
IMO, we should repair database, check its consistency, and delete all if it was
inconsistent.
But, checking consistency needs some more work.

How about disabling DELETE_ON_CORRUPTION, and enable with fsck code in next CL?

[ericu, 2012/03/22 03:54:17]

Sounds good.

+  };
+
+  bool Init(RecoveryOption recovery_option);
   bool StoreDefaultValues();
   bool GetLastFileId(FileId* file_id);
   bool VerifyIsDirectory(FileId file_id);
   bool AddFileInfoHelper(
       const FileInfo& info, FileId file_id, leveldb::WriteBatch* batch);
   bool RemoveFileInfoHelper(FileId file_id, leveldb::WriteBatch* batch);
   void HandleError(const tracked_objects::Location& from_here,
                    leveldb::Status status);
 
-  std::string path_;
+  FilePath sandbox_directory_;
   scoped_ptr<leveldb::DB> db_;
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_FILE_SYSTEM_DIRECTORY_DATABASE_H_