In RenderLayerCompositor, track layer bounds and the haveComputedBounds flag together in a struct
Created attachment 248178 [details] Patch
Created attachment 248179 [details] Patch
Comment on attachment 248179 [details] Patch r=me
Comment on attachment 248179 [details] Patch Clearing flags on attachment: 248179 Committed r181245: <http://trac.webkit.org/changeset/181245>
All reviewed patches have been landed. Closing bug.