R=ulan@chromium.org

Bug: v8:7141
Change-Id: I21b82f5c3f6a2cd5f6e525d267d6c6819b1370fb
Reviewed-on: https://chromium-review.googlesource.com/796370
Commit-Queue: Yang Guo <yangguo@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49784}