Fix several small compile problems which causes by
https://crrev.com/c/1585737.

Change-Id: I78a07d597db9d81d4a99aac08e257f380be8f7e6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1589202Reviewed-by: Dan Elphick <delphick@chromium.org>
Commit-Queue: Yu Yin <xwafish@gmail.com>
Cr-Commit-Position: refs/heads/master@{#61120}