[webkit-reviews] review requested: [Bug 130984] Synchronize Web process remote layer tree commits with CoreAnimation commits in the UI process : [Attachment 228193] patch

[bugzilla-daemon at webkit.org]

Tim Horton <thorton at apple.com> has asked  for review:
Bug 130984: Synchronize Web process remote layer tree commits with
CoreAnimation commits in the UI process
https://bugs.webkit.org/show_bug.cgi?id=130984

Attachment 228193: patch
https://bugs.webkit.org/attachment.cgi?id=228193&action=review

------- Additional Comments from Tim Horton <thorton at apple.com>
There's no reason for the Web process to paint faster than the UI process
can apply to and commit the CoreAnimation layer tree.

Also, once we get proper double-buffering and purgeable back buffers, we
will need the ability to make some assumptions about in-use surfaces.

Unfortunately, we can't actually tell when the render server commits, 
as this is an asynchronous operation in a process we don't control, so
for now, this is only an approximation.

This also means that the assumptions we would like to make won't be
strong guarantees yet.