This roll includes:
8515c2a1c UBSan fix
9977c471b (does not touch files imported into V8)
9cba74155 (does not touch files imported into V8)

Bug: v8:3770
Change-Id: If5ae5e7c6a7a81a246c8376545c4437cacaf1dc3
Reviewed-on: https://chromium-review.googlesource.com/c/1436230Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59103}