Roll v8/ 278633dc7..340416187 (254 commits)

https://chromium.googlesource.com/v8/v8.git/+log/278633dc7c77..340416187182

Version 10.8.12

Created with:
  roll-dep v8

Change-Id: I43b616fc09078049850866f4824e0bc9c5337641
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/98230
Reviewed-by: Nigi <nigi@chromium.org>
Commit-Queue: Nigi <nigi@chromium.org>
Auto-Submit: Lei Zhang <thestig@chromium.org>
diff --git a/DEPS b/DEPS
index cb6da85..7185232 100644
--- a/DEPS
+++ b/DEPS
@@ -150,7 +150,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling v8
   # and whatever else without interference from each other.
-  'v8_revision': '278633dc7c7780c32534be8919b92d1832b4a642',
+  'v8_revision': '340416187182ada2249945ca0bae0777f253ccad',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling zlib
   # and whatever else without interference from each other.