BUG=v8:5402,v8:6921

Change-Id: Iab2509554718a6beca73217f80cafedf650bd066
Reviewed-on: https://chromium-review.googlesource.com/718741Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48629}