chromeos: Check validity of loaded data in DriveResourceMetadataStorageDB::Initialize

chrome/browser/chromeos/drive/drive_resource_metadata_storage.h

 // Copyright 2013 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 CHROME_BROWSER_CHROMEOS_DRIVE_DRIVE_RESOURCE_METADATA_STORAGE_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_DRIVE_RESOURCE_METADATA_STORAGE_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 144 matching lines @@
 
  private:
   friend class DriveResourceMetadataStorageTest;
 
   // Puts header.
   void PutHeader(const DriveResourceMetadataHeader& header);
 
   // Gets header.
   scoped_ptr<DriveResourceMetadataHeader> GetHeader();
 
+  // Checks validity of the data.
+  bool CheckValidity();
+
   // Path to the directory where the data is stored.
   base::FilePath directory_path_;
 
   // Entries stored in this storage.
   scoped_ptr<leveldb::DB> resource_map_;
 
   // Parent-child relationship between entries.
   scoped_ptr<leveldb::DB> child_map_;
 
   DISALLOW_COPY_AND_ASSIGN(DriveResourceMetadataStorageDB);
 };
 
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_DRIVE_RESOURCE_METADATA_STORAGE_H_