Const-ify some IDB code
Noticed in upcoming, bigger patches that these 5 IDB methods should've taken const references as arguments instead of non-const references.
Created attachment 277948 [details]
Comment on attachment 277948 [details]
Clearing flags on attachment: 277948
Committed r200352: <http://trac.webkit.org/changeset/200352>
All reviewed patches have been landed. Closing bug.