Namely: make RemoteRenderingBackend the ItemBufferReadingClient, so that we don't need to static_cast image buffers to their concrete classes in RemoteRenderingBackend.
Created attachment 413532 [details] Patch
Comment on attachment 413532 [details] Patch Thanks for the review!
Committed r269564: <https://trac.webkit.org/changeset/269564> All reviewed patches have been landed. Closing bug and clearing flags on attachment 413532 [details].