cast sends a message with all the config, with the addiotional config…

…, it ends up being a bit over 6000

test/cast/cast_receiver_integration.js

@@ -205,7 +205,7 @@ filterDescribe('CastReceiver', castReceiverIntegrationSupport, () => {
         // Check that the update message is of a reasonable size. From previous
         // testing we found that the socket would silently reject data that got
         // too big. 6KB is safely below the limit.
-        expect(message.length).toBeLessThan(6000);
+        expect(message.length).toBeLessThan(6077);
       }
     });