[webmessaging-tests] fix structured-cloning with getter properties (#1438)

Getter property would not be copied during structured-cloning, no Error
is mentioned in the spec (infrastructure.html#structured-clone). The
original case contained 2 independent cases, which can be separated.

View on GitHub: https://github.com/w3c/web-platform-tests/pull/1438

Received on Tuesday, 2 December 2014 13:43:30 UTC