These functions have been marked V8_DEPRECATE_SOON for a long time,
now all uses have been removed from Chrome, mark them as deprecated.

BUG=v8:7287,v8:8238

Change-Id: I47b23588231ca510ec2475cb476e4134c05e162a
Reviewed-on: https://chromium-review.googlesource.com/c/1356517Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58154}