Roll v8/ db22e96fb..a4f6a37da (307 commits)

https://chromium.googlesource.com/v8/v8.git/+log/db22e96fb450..a4f6a37da361

Version 7.2.149

Created with:
  roll-dep v8

TBR=tsepez@chromium.org

Change-Id: Iace7cc8e4319aca65520ecc17d49fef2623be4c8
Reviewed-on: https://pdfium-review.googlesource.com/c/44695
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>

DEPS

diff --git a/DEPS b/DEPS
index b370836..b808925 100644
--- a/DEPS
+++ b/DEPS
@@ -33,7 +33,7 @@
   'skia_revision': '588f879677d4f36e16a42dd96876534f104c2e2f',
   'tools_memory_revision': 'f7b00daf4df7f6c469f5fbc68d7f40f6bd15d6e6',
   'trace_event_revision': '211b3ed9d0481b4caddbee1322321b86a483ca1f',
-  'v8_revision': 'db22e96fb4501f1da2415dac90d728cbfeb94981',
+  'v8_revision': 'a4f6a37da361b69c87c9230152d8cfb8ce351428',
   'yasm_source_revision': '720b70524a4424b15fc57e82263568c8ba0496ad',
   'zlib_revision': 'dcf1d0f8c952f76cfceefb4ba61e004f93ad7287',
 }