afdo_metadata: Publish new profiles for Chrome.

Update benchmark from chromeos-chrome-amd64-79.0.3931.2_rc-r1.afdo to chromeos-chrome-amd64-79.0.3940.0_rc-r1.afdo

Change-Id: I55ff822fc36645fd0bbfdb0b9441f9d2a59f2e80
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/1865836
diff --git a/afdo_metadata/chrome_afdo.json b/afdo_metadata/chrome_afdo.json
index 3debcd8..e46e05f 100644
--- a/afdo_metadata/chrome_afdo.json
+++ b/afdo_metadata/chrome_afdo.json
@@ -3,7 +3,7 @@
         "name": "R79-3928.0-1571049528.afdo"
     }, 
     "benchmark": {
-        "name": "chromeos-chrome-amd64-79.0.3931.2_rc-r1.afdo"
+        "name": "chromeos-chrome-amd64-79.0.3940.0_rc-r1.afdo"
     }, 
     "airmont": {
         "name": "R79-3931.2-1571054549.afdo"