Roll v8/ 270b6f4e1..867a6e526 (268 commits)

https://chromium.googlesource.com/v8/v8.git/+log/270b6f4e13c0..867a6e52620f

Version 12.9.71

Created with:
  roll-dep v8

Change-Id: I37b2b1e360cd303a03bbe91ece4ee387e023fb60
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/122830
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/DEPS b/DEPS
index 5979e51..dbf4218 100644
--- a/DEPS
+++ b/DEPS
@@ -206,7 +206,7 @@
   # 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': '270b6f4e13c01d7d3224ac38a24b6826b26d8f4f',
+  'v8_revision': '867a6e52620ff06a859f71d3dc5c474cded76c06',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling zlib
   # and whatever else without interference from each other.