[TexMap] Drop RefCounted inheritance off of TextureMapperBackingStore
Created attachment 338401 [details] Patch
Created attachment 338569 [details] Patch for landing
Comment on attachment 338569 [details] Patch for landing Clearing flags on attachment: 338569 Committed r230906: <https://trac.webkit.org/changeset/230906>
All reviewed patches have been landed. Closing bug.
<rdar://problem/39638450>