Automated Commit: LKGM 12872.0.0 for chromeos.

CQ_INCLUDE_TRYBOTS=luci.chrome.try:chromeos-betty-chrome
CQ_INCLUDE_TRYBOTS=luci.chrome.try:chromeos-betty-pi-arc-chrome
CQ_INCLUDE_TRYBOTS=luci.chrome.try:chromeos-eve-compile-chrome
CQ_INCLUDE_TRYBOTS=luci.chrome.try:chromeos-kevin-compile-chrome

BUG=762641
TBR=chrome-os-gardeners@google.com

Change-Id: I39ad34496c80d7234c7432b2e39a089846aaefa7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2034243
Reviewed-by: ChromeOS bot <3su6n15k.default@developer.gserviceaccount.com>
Commit-Queue: ChromeOS bot <3su6n15k.default@developer.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#737605}
diff --git a/chromeos/CHROMEOS_LKGM b/chromeos/CHROMEOS_LKGM
index 7252663..881ad3f 100644
--- a/chromeos/CHROMEOS_LKGM
+++ b/chromeos/CHROMEOS_LKGM
@@ -1 +1 @@
-12871.0.0
\ No newline at end of file
+12872.0.0
\ No newline at end of file