Start turning up the new CrOS bots in the CQ.

We will replace
  - chromeos_amd64-generic_chromium_compile_only_ng
  - chromeos_daisy_chromium_compile_only_ng
  - linux_chromium_chromeos_rel_ng
with
  - chromeos-amd64-generic-rel
  - chromeos-daisy-rel
  - linux-chromeos-rel
respectively.

R=smut@google.com
BUG=732531

Change-Id: Ia053a859666456319c2248caa31b23e8f619aa3a
Reviewed-on: https://chromium-review.googlesource.com/731768
Reviewed-by: smut <smut@google.com>
Commit-Queue: Dirk Pranke <dpranke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#511320}

infra/config/cq.cfg

@@ -34,6 +34,23 @@ verifiers {
       builders { name: "cast_shell_android" }
       builders { name: "linux_android_rel_ng" }
     }
+    buckets {
+      # TODO(crbug.com/732531) Replace the CrOS builders
+      # on master.tryserver.chromium.linux with these.
+      name: "master.tryserver.chromium.chromiumos"
+      builders {
+        name: "chromeos-amd64-generic-rel"
+        experiment_percentage: 3
+      }
+      builders {
+        name: "chromeos-daisy-rel"
+        experiment_percentage: 3
+      }
+      builders {
+        name: "linux-chromeos-rel"
+        experiment_percentage: 3
+      }
+    }
     buckets {
       name: "master.tryserver.chromium.linux"
       builders { name: "cast_shell_linux" }