Several test cases started failing after r142112: compositing/iframes/iframe-composited-scrolling.html compositing/layer-creation/fixed-position-in-view-dynamic.html compositing/layer-creation/fixed-position-out-of-view-dynamic.html compositing/layer-creation/fixed-position-out-of-view-scroll-reason.html compositing/layer-creation/no-compositing-for-fixed-position-under-transform.html The diff looks like: -PASS +FAIL: Has viewport constrained objects without supporting fixed layers
http://build.webkit.org/results/EFL%20Linux%2064-bit%20Release%20WK2/r142112%20(4280)/results.html
The layer-creation/ ones are passing as of r148005.
compositing/iframes/iframe-composited-scrolling.html started to pass after r163614 <http://trac.webkit.org/changeset/163614>