Port 82ca2a41

Original commit message:
    This is preferable because in TurboFan we need to call it, and can't pass
    untagged external pointers on the stack.

R=mvstanton@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1553143002

Cr-Commit-Position: refs/heads/master@{#33092}