UserProfile should add to an existing userprofile #342
Description
If you specify a user profile at the beginning of a script and don't visit some of the origins, when you export the user profile again, it will not included IndexedDb or local storage in the export.
User Profiles should accumulate changes to match the way cookies behave.
In addition, look into streaming changes as they occur so we can better restore sessions:
- DOMStorage.enable to track local/session storage
- Storage.trackIndexedDBForOrigin to track index db for a url