Reintroduce convenience CheckedInt*, CheckedUint* types
Created attachment 207637 [details] Patch
As per https://bugs.webkit.org/show_bug.cgi?id=119022#c9.
Comment on attachment 207637 [details] Patch Clearing flags on attachment: 207637 Committed r153440: <http://trac.webkit.org/changeset/153440>
All reviewed patches have been landed. Closing bug.