R=littledan@chromium.org
BUG=v8:3715, v8:4528
LOG=Y

Committed: https://crrev.com/60e8877e161fe6175e19fafce2d6ed1c3999cdb1
Cr-Commit-Position: refs/heads/master@{#31753}

Review URL: https://codereview.chromium.org/1419823010

Cr-Commit-Position: refs/heads/master@{#31773}