Roll v8/ e981e9f0b..6a91312c4 (318 commits)

https://chromium.googlesource.com/v8/v8.git/+log/e981e9f0b6c2..6a91312c4fe4

Version 8.4.306

Created with:
  roll-dep v8

Change-Id: Ib34fa4f3cd93b461b52c242975a3c81dbd725a93
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/69375
Commit-Queue: Daniel Hosseinian <dhoss@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>

DEPS

diff --git a/DEPS b/DEPS
index c1b66ff..c456fa2 100644
--- a/DEPS
+++ b/DEPS
@@ -95,7 +95,7 @@
   # 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': 'e981e9f0b6c271088b324240ebe84112b56ee377',
+  'v8_revision': '6a91312c4fe4c3a4a75101318de7885d60b71e94',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling zlib
   # and whatever else without interference from each other.