Add database recovery for FileSystemDirectoryDatabase.

webkit/fileapi/file_system_usage_cache.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_USAGE_CACHE_H_
 #define WEBKIT_FILEAPI_FILE_SYSTEM_USAGE_CACHE_H_
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
 
@@ skipping 24 matching lines @@
   static int UpdateUsage(const FilePath& usage_file_path, int64 fs_usage);
 
   // Updates the size described in the .usage file by delta with keeping dirty
   // even if dirty > 0.
   static int AtomicUpdateUsageByDelta(
       const FilePath& usage_file_path, int64 delta);
 
   static bool Exists(const FilePath& usage_file_path);
   static bool Delete(const FilePath& usage_file_path);
 
-  static const char kUsageFileName[];
+  static const FilePath::CharType kUsageFileName[];
   static const char kUsageFileHeader[];
   static const int kUsageFileSize;
   static const int kUsageFileHeaderSize;
 
  private:
   // Read the size, validity and the "dirty" entry described in the .usage file.
   // Returns less than zero if no .usage file is available.
   static int64 Read(const FilePath& usage_file_path,
                     bool* is_valid,
                     uint32* dirty);
 
   static int Write(const FilePath& usage_file_path,
                    bool is_valid,
                    uint32 dirty,
                    int64 fs_usage);
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_FILE_SYSTEM_USAGE_CACHE_H_