* SUMMARY Each test should run with its own clean data store. This would be useful so that tests that create IndexedDB or WebSQL databases do not affect other tests testing IndexedDB/WebSQL. * NOTES See LayoutTests/inspector/indexeddb/requestDatabaseNames.html which has to deal with fallout from fast/history tests that create an IndexedDB.
The key consideration here is that tests shouldn't become slower because of the cleanup.