Address the TODOs in the PushMessagingBrowserTest for the endpoint merge.

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 b58c0023555b5e255ba959c005edb5cd51b60fc9..dda5908647dfbf90ac3ee112f3ecfc1f2d871669 100644
--- a/chrome/test/data/push_messaging/push_test.js
+++ b/chrome/test/data/push_messaging/push_test.js
@@ -97,8 +97,7 @@ function subscribePush() {
     return swRegistration.pushManager.subscribe()
         .then(function(subscription) {
           pushSubscription = subscription;
-          sendResultToTest(
-              subscription.endpoint + ' - ' + subscription.subscriptionId);
+          sendResultToTest(subscription.endpoint);
         });
   }).catch(sendErrorToTest);
 }