FileSystem: Prevent iterator from being deleted after database.

storage/browser/fileapi/sandbox_origin_database.h

Index: storage/browser/fileapi/sandbox_origin_database.h
diff --git a/storage/browser/fileapi/sandbox_origin_database.h b/storage/browser/fileapi/sandbox_origin_database.h
index 0562385ebd6849e518dab8940479674772edb753..c1bd7a3646cc6b127dcc7b64eca01b8658e185e1 100644
--- a/storage/browser/fileapi/sandbox_origin_database.h
+++ b/storage/browser/fileapi/sandbox_origin_database.h
@@ -61,6 +61,8 @@ class STORAGE_EXPORT SandboxOriginDatabase
 
   bool Init(InitOption init_option, RecoveryOption recovery_option);
   bool RepairDatabase(const std::string& db_path);
+  // Close the database. Before this, all iterators associated with the database
+  // must be deleted.
   void HandleError(const tracked_objects::Location& from_here,
                    const leveldb::Status& status);
   void ReportInitStatus(const leveldb::Status& status);