BUG=v8:6325,v8:5402

Change-Id: If0c975fe377c0178c488fc1bedd02f9c8289ebbc
Reviewed-on: https://chromium-review.googlesource.com/490086Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44979}