[webmessaging-tests] WebMessaging__3rd param not Transferable should throw TypeError (#1439)

- with-ports 025, 026 should throw TypeError when the 3rd param isn't
Transferable;
- without-ports 025, dont mean to fix the case. Remove the unused var
obj to avoid confusion in the future.

View on GitHub: https://github.com/w3c/web-platform-tests/pull/1439

Received on Wednesday, 3 December 2014 11:10:53 UTC