Code to migrate a single directory from the old sandbox to the new.

webkit/fileapi/file_system_directory_database.cc

 // 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.
 
 #include "webkit/fileapi/file_system_directory_database.h"
 
 #include <math.h>
 
 #include "base/pickle.h"
 #include "base/string_number_conversions.h"
@@ skipping 371 matching lines @@
     HandleError(status);
     return false;
   }
   // The database must not yet exist; initialize it.
   if (!StoreDefaultValues())
     return false;
 
   return GetNextInteger(next);
 }
 
+// static
+bool FileSystemDirectoryDatabase::DestroyDatabase(const FilePath& path) {
+  std::string name;
+#if defined(OS_POSIX)
+  name = path.value();
+#elif defined(OS_WIN)
+  name = base::SysWideToUTF8(path.value());
+#endif
+  leveldb::Status status = leveldb::DestroyDB(name, leveldb::Options());
+  if (status.ok())
+    return true;
+  LOG(WARNING) << "Failed to destroy a database with status " <<
+      status.ToString();
+  return false;
+}
+
 bool FileSystemDirectoryDatabase::Init() {
  if (db_.get())
    return true;
 
  leveldb::Options options;
  options.create_if_missing = true;
  leveldb::DB* db;
  leveldb::Status status = leveldb::DB::Open(options, path_, &db);
  if (status.ok()) {
    db_.reset(db);
@@ skipping 111 matching lines @@
   return true;
 }
 
 void FileSystemDirectoryDatabase::HandleError(leveldb::Status status) {
   LOG(ERROR) << "FileSystemDirectoryDatabase failed with error: " <<
       status.ToString();
   db_.reset();
 }
 
 }  // namespace fileapi