Adds blimp browser tests to run on Chromium.linux.

infra/config/cq.cfg

Index: infra/config/cq.cfg
diff --git a/infra/config/cq.cfg b/infra/config/cq.cfg
index 764536020d4a9c5b295edd01c3f2e3364d966021..cbd3508227d7f83f913caa3598ae9cf9f1c7c384 100644
--- a/infra/config/cq.cfg
+++ b/infra/config/cq.cfg
@@ -41,6 +41,10 @@ verifiers {
     }
     buckets {
       name: "tryserver.chromium.linux"
+      builders {
+        name: "blimp_linux_dbg"
+        experiment_percentage: 10
+      }
       builders { name: "cast_shell_linux" }
       builders { name: "chromeos_amd64-generic_chromium_compile_only_ng" }
       builders { name: "chromeos_daisy_chromium_compile_only_ng" }