Remove reference to PropertyCellSpace from include/v8.h
Remove reference to PropertyCellSpace from include/v8.h

BUG=

Review URL: https://codereview.chromium.org/1009123003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#27371}

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