R=jkummerow@chromium.org

Bug: v8:6791
Change-Id: I55c11c1328c92983286a8173795ce38f0b1e9e8e
TBR: yangguo@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/735322Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48897}