Hide warning sign for Active Directory pods

ui/login/account_picker/user_pod_row.js

Index: ui/login/account_picker/user_pod_row.js
diff --git a/ui/login/account_picker/user_pod_row.js b/ui/login/account_picker/user_pod_row.js
index 37746d01d1efa4ca6f00b54c99bd84c96be7a1a9..cf092570bcf68313bf524cf32f93120cdd69a51d 100644
--- a/ui/login/account_picker/user_pod_row.js
+++ b/ui/login/account_picker/user_pod_row.js
@@ -780,6 +780,9 @@ cr.define('login', function() {
           AUTH_TYPE.OFFLINE_PASSWORD;
       this.setAuthType(initialAuthType, null);
 
+      if (this.user.isActiveDirectory)
+        this.setAttribute('is-active-directory', '');
+
       this.userClickAuthAllowed_ = false;
 
       // Lazy load the assets needed for the polymer submit button.