BUG=v8:8751,v8:8752

Change-Id: Ib99d5b9c399d5f2ab616399fdd3c7f190e2d0399
Reviewed-on: https://chromium-review.googlesource.com/c/1445971Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59203}