Port e1fde266

R=neis@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=v8:6048
LOG=N

Review-Url: https://codereview.chromium.org/2739813002
Cr-Commit-Position: refs/heads/master@{#43676}