Require internal recipe tryjob

infra/config/cq.cfg

 # Commit Queue configuration file. The documentation of the format can be found
 # at http://luci-config.appspot.com/schemas/projects/refs:cq.cfg.
 
 version: 1
 cq_name: "depot_tools"
 cq_status_url: "https://chromium-cq-status.appspot.com"
 git_repo_url: "https://chromium.googlesource.com/chromium/tools/depot_tools"
 
 gerrit {}
 rietveld {
@@ skipping 13 matching lines @@
         name: "Depot Tools Presubmit"
       }
       builders {
         name: "Depot Tools Presubmit (Swarming)"
         experiment_percentage: 100
       }
       builders {
         name: "Recipe Roll Downstream Tester"
       }
     }
+    buckets {
+      name: "master.internal.infra.try"
+      builders { name: "build-internal-recipe-downstream-tryjob" }
+    }
   }
 }