See
https://clang.llvm.org/extra/clang-tidy/checks/google-readability-casting.html
and https://google.github.io/styleguide/cppguide.html#Casting.

Change-Id: Ib5a3bb8873bc6d050c4d0abe36a3ae813bbd448a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2233987Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68301}