By Bug 89409, we started to store unmodified form control state. However we don't need to make such state for some types. For example, we don't need to save state of type=password controls at all.
Created attachment 151676 [details]
Comment on attachment 151676 [details]
Clearing flags on attachment: 151676
Committed r122414: <http://trac.webkit.org/changeset/122414>
All reviewed patches have been landed. Closing bug.