It's needed by code-stubs.h and it was defined in objects-inl.h.
That cannot work without violating the include rules.

BUG=v8:5402
R=mstarzinger@chromium.org

Change-Id: Icb84b97de5622df8cf76e9fc4d117982901c99d9
Reviewed-on: https://chromium-review.googlesource.com/441845
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43195}