Add experimental Swarming builders

config/cq.cfg

Index: config/cq.cfg
diff --git a/config/cq.cfg b/config/cq.cfg
index ad5bd6394cb2ff3fc9896f87a51d3b8c96fc268b..a845a3325b19d42234e7e546f38852a87a06f8e1 100644
--- a/config/cq.cfg
+++ b/config/cq.cfg
@@ -57,6 +57,27 @@ verifiers {
       builders {
         name: "Infra Win Tester"
       }
+
+      builders {
+        name: "Infra Presubmit (Swarming)"
+        experiment_percentage: 100
+      }
+      builders {
+        name: "Infra Linux Trusty 64 Tester (Swarming)"
+        experiment_percentage: 100
+      }
+      builders {
+        name: "Infra Linux Precise 32 Tester (Swarming)"
+        experiment_percentage: 100
+      }
+      builders {
+        name: "Infra Mac Tester (Swarming)"
+        experiment_percentage: 100
+      }
+      builders {
+        name: "Infra Win Tester (Swarming)"
+        experiment_percentage: 100
+      }
     }
   }
   sign_cla {}