Update V8 to version 7.1.163.

Summary of changes available at:
https://chromium.googlesource.com/v8/v8/+log/8994403e..2f22d111

Please follow these instructions for assigning/CC'ing issues:
https://github.com/v8/v8/wiki/Triaging%20issues

Please close rolling in case of a roll revert:
https://v8-roll.appspot.com/
This only works with a Google account.

CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel;luci.chromium.try:android_optional_gpu_tests_rel

TBR=hablich@chromium.org,v8-waterfall-sheriff@grotations.appspotmail.com

Change-Id: I33f96a3637ec00461294c67acb3a34a06ef7c3bb
Reviewed-on: https://chromium-review.googlesource.com/1239723
Reviewed-by: V8 Autoroller <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: V8 Autoroller <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#593424}
diff --git a/DEPS b/DEPS
index 24b8d2f..4985d3f 100644
--- a/DEPS
+++ b/DEPS
@@ -109,7 +109,7 @@
   # 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': '8994403ed673c0a2ce5a953328add1f4755d369f',
+  'v8_revision': '2f22d11156ccb1f88587896c27151944cad48cba',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling swarming_client
   # and whatever else without interference from each other.