tree cfe6aceeba47e8d12293375c85f4fc8f2d31e66c
parent 8aa927f08f6b92808976b0c22fa4a45850279987
author Thomas Van Lenten <thomasvl@google.com> 1492535452 -0400
committer Thomas Van Lenten <thomasvl@google.com> 1492535452 -0400

Tighten up class usage/checks.

- Ensure extensions resolution/wiring is happening directly on the
  messageClass (incase someone is doing odd things our out classes).
- Make the extension message check match the other class checks in
  for mergeFrom/isEqual/etc.