Add database recovery for FileSystemOriginDatabase

webkit/fileapi/file_system_directory_database.h

Index: webkit/fileapi/file_system_directory_database.h
diff --git a/webkit/fileapi/file_system_directory_database.h b/webkit/fileapi/file_system_directory_database.h
index 1c760b8e3fd8c487e708a8830553f0c576a625ce..8308a39bace866975267697bb26d32dc473c97ab 100644
--- a/webkit/fileapi/file_system_directory_database.h
+++ b/webkit/fileapi/file_system_directory_database.h
@@ -18,6 +18,7 @@ class Location;
 }
 
 namespace leveldb {
+class Status;
 class WriteBatch;
 }
 
@@ -87,7 +88,8 @@ class FileSystemDirectoryDatabase {
   static bool DestroyDatabase(const FilePath& path);
 
  private:
-  bool Init();
+  bool Init(bool cleanup_if_corrupted);
+  bool CheckIfDatabaseCorrupted(const leveldb::Status& status) const;
   bool StoreDefaultValues();
   bool GetLastFileId(FileId* file_id);
   bool VerifyIsDirectory(FileId file_id);