tree b4a84a4932346add89ad1791bf8dadfbd5f9bcc0
parent 29b6745752aefdfad58304e1f7a1ba807f1282b0
author Michael Ryleev <gmar@google.com> 1490120810 -0700
committer Michael Ryleev <gmar@google.com> 1517444245 -0800

[tipc] Rework how IPC chan handles gets destroyed

Stop registering shutdown callback for ports and channels.
Instead invoke corresponding shutdown code when last
reference to handle goes away. This way, handle_close is
effectively just decrements handle ref. Stop using handle_close
in favor of handle_decref where appropriate.

Change-Id: I8dff9182bc886f1187cb43c8320ae2c5400eeaee