FileSystem: Make SandboxDirectoryDatabase::DestroyDatabase non-static for cleanup

storage/browser/fileapi/sandbox_directory_database.h

Index: storage/browser/fileapi/sandbox_directory_database.h
diff --git a/storage/browser/fileapi/sandbox_directory_database.h b/storage/browser/fileapi/sandbox_directory_database.h
index a966811e051865eecb73df65b772e55e03f8c933..7918d121d9ff8c266393ce0df9cd01a63540ee81 100644
--- a/storage/browser/fileapi/sandbox_directory_database.h
+++ b/storage/browser/fileapi/sandbox_directory_database.h
@@ -99,8 +99,8 @@ class STORAGE_EXPORT_PRIVATE SandboxDirectoryDatabase {
   // Returns true if the database looks consistent with local filesystem.
   bool IsFileSystemConsistent();
 
-  static bool DestroyDatabase(const base::FilePath& path,
-                              leveldb::Env* env_override);
+  // Completely deletes contents of the database.
+  bool DestroyDatabase();
 
  private:
   enum RecoveryOption {