[mojo-edk] Reset Port::send_on_proxy_removal after sending message.

If two threads try to call Node::MaybeRemoveProxy_Locked and both end up
trying to send the proxy removal message, the second attempt will result
in a null message since the first one moved it into ForwardMessage.

BUG=619522

Review-Url: https://codereview.chromium.org/2063113002
Cr-Commit-Position: refs/heads/master@{#399664}


CrOS-Libchrome-Original-Commit: 2bb5f5da90bf2584f7f971fed962ce6a564bc3be
2 files changed
tree: e8a5a5fa776f7519506627b859ff229c258491a0
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/