Roll v8/ 28729333e..64478f20c (74 commits)

https://chromium.googlesource.com/v8/v8.git/+log/28729333e160..64478f20cfc0

Version 9.2.12

Created with:
  roll-dep v8

Change-Id: I76b98fbf8246bebcfb5aeab8eafd1b139d2545a0
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/79252
Auto-Submit: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Daniel Hosseinian <dhoss@chromium.org>
diff --git a/DEPS b/DEPS
index 510c3f0..70bf5b3 100644
--- a/DEPS
+++ b/DEPS
@@ -127,7 +127,7 @@
   # 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': '28729333e160c8ce3440db840be38a6c62b91857',
+  'v8_revision': '64478f20cfc01191c2173ac646f73e599c9f3f69',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling zlib
   # and whatever else without interference from each other.