BUG=v8:7754

Change-Id: Id04fddb65c7943e9cb394c700eda45c6c6f7ebfd
Reviewed-on: https://chromium-review.googlesource.com/1147746
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54660}