tree 2e2d14e7962fcce7e300aa6dbf10bd4d240771ff
parent 4d5f30d9dbaae495c5a4f34c50b460e5d5c935eb
author Mark D. Roth <roth@google.com> 1498153981 -0700
committer Mark D. Roth <roth@google.com> 1498153981 -0700

Add support for Trailers-Only responses.

- When receiving a Trailers-Only response, return the metadata as
  trailing metadata instead of initial metadata.
- Send Trailers-Only response when we have no non-default initial metadata,
  no message to send, and trailing metadata to send.