Add using WTF::isInBounds to CheckedArithmetic.h. It's already being used outside of CheckedArithmetic.h. See: <https://bugs.webkit.org/show_bug.cgi?id=210227#c9>
Created attachment 395996 [details] Patch v1
Committed r259833: <https://trac.webkit.org/changeset/259833> All reviewed patches have been landed. Closing bug and clearing flags on attachment 395996 [details].
<rdar://problem/61542847>