Disallow repeated PushManager.subscribes with different sender ids

chrome/test/data/push_messaging/push_test.js

Index: chrome/test/data/push_messaging/push_test.js
diff --git a/chrome/test/data/push_messaging/push_test.js b/chrome/test/data/push_messaging/push_test.js
index d4790fa35890c0c0f6dee09caa5e61f95b0e30b2..6dad4b3f1f3cd4934130479af904a04618559567 100644
--- a/chrome/test/data/push_messaging/push_test.js
+++ b/chrome/test/data/push_messaging/push_test.js
@@ -144,10 +144,10 @@ function workerSubscribePushNoKey() {
       {command: 'workerSubscribeNoKey'});
 }
 
-function workerSubscribePushWithNumericKey() {
-  // Send the message to the worker for it to subscribe
+function workerSubscribePushWithNumericKey(numericKey = '1234567890') {
+  // Send the message to the worker for it to subscribe with the given key
   navigator.serviceWorker.controller.postMessage(
-      {command: 'workerSubscribeWithNumericKey'});
+      {command: 'workerSubscribeWithNumericKey', key: numericKey});
 }
 
 function GetP256dh() {