Currently CoordinatedGraphicsLayer marks the AnimatedBackingStoreClient as changed with each layer flush, even if the layer doesn't require a client (and the value is null). Modify this so layers that don't require those clients don't modify them.
Created attachment 417534 [details] Patch
zan@falconsigh.net does not have reviewer permissions according to https://svn.webkit.org/repository/webkit/trunk/Tools/Scripts/webkitpy/common/config/contributors.json. Rejecting attachment 417534 [details] from commit queue.
Committed r271576: <https://trac.webkit.org/changeset/271576> All reviewed patches have been landed. Closing bug and clearing flags on attachment 417534 [details].