Disable job-based sweeping in predictable mode.
Disable job-based sweeping in predictable mode.

BUG=v8:3563
LOG=N
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/604283002

git-svn-id: f98b9d40cb02301bc76fa9e1b46ee668158567fd@24254 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh