Use fewer raw pointers and more const correctness in Frame.h
Created attachment 413234 [details] Patch
Created attachment 413238 [details] Patch
Created attachment 413241 [details] Patch
Created attachment 413246 [details] Patch
Committed r269434: <https://trac.webkit.org/changeset/269434> All reviewed patches have been landed. Closing bug and clearing flags on attachment 413246 [details].
<rdar://problem/71079618>