Enable led launched tasks for the try-m85 bucket.

Bug: 1128877
Change-Id: I28384ff12cb87aa62d4bed9e83ef6163aef25de0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2414835
Auto-Submit: Garrett Beaty <gbeaty@chromium.org>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Commit-Queue: Garrett Beaty <gbeaty@chromium.org>
Cr-Commit-Position: refs/heads/master@{#807612}

infra/config/generated/realms.cfg

@@ -272,6 +272,11 @@ realms {
     principals: "user:findit-for-me@appspot.gserviceaccount.com"
     principals: "user:tricium-prod@appspot.gserviceaccount.com"
   }
+  bindings {
+    role: "role/swarming.taskTriggerer"
+    principals: "group:chromium-led-users"
+    principals: "user:infra-try-recipes-tester@chops-service-accounts.iam.gserviceaccount.com"
+  }
 }
 realms {
   name: "webrtc"

infra/config/swarming.star

@@ -83,6 +83,20 @@ swarming.task_triggerers(
     ],
 )
 
+# LED users that can trigger try builds via LED.
+swarming.task_triggerers(
+    builder_realm = "try-m85",
+    pool_realm = "pools/try",
+    groups = [
+        "chromium-led-users",
+    ],
+    users = [
+        # An account used by "Build Recipes Tester" builder infra/try bucket
+        # used to tests changes to Chromium recipes using LED before commit.
+        "infra-try-recipes-tester@chops-service-accounts.iam.gserviceaccount.com",
+    ],
+)
+
 # Realm with bots that run isolated tests.
 #
 # Tasks here are triggered directly on Swarming (not via Buildbucket) by various