Add gerrit to cq.cfg

infra/config/cq.cfg

Index: infra/config/cq.cfg
diff --git a/infra/config/cq.cfg b/infra/config/cq.cfg
index e12f3c3096e10ad2fac6062674eeb14485624df9..d93843851947bf942478cd256a77f589744ba7c7 100644
--- a/infra/config/cq.cfg
+++ b/infra/config/cq.cfg
@@ -4,9 +4,11 @@
 version: 1
 cq_name: "webrtc"
 cq_status_url: "https://chromium-cq-status.appspot.com"
+git_repo_url: "https://chromium.googlesource.com/external/webrtc"
 commit_burst_delay: 60
 max_commit_burst: 1
 
+gerrit {}
 rietveld {
   url: "https://codereview.webrtc.org"
 }
@@ -18,6 +20,11 @@ verifiers {
     dry_run_access_list: "project-webrtc-tryjob-access"
   }
 
+  gerrit_cq_ability {
+    committer_list: "project-webrtc-committers"
+    dry_run_access_list: "project-webrtc-tryjob-access"
+  }
+
   tree_status {
     tree_status_url: "https://webrtc-status.appspot.com"
   }