Fixed int vs. uintptr_t confusion (plus some cleanup on the way).
Fixed int vs. uintptr_t confusion (plus some cleanup on the way).

BUG=v8:3556
LOG=y
R=jochen@chromium.org

Review URL: https://codereview.chromium.org/567573004

git-svn-id: f98b9d40cb02301bc76fa9e1b46ee668158567fd@23966 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

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