commit ebcf9595bf908b515ffcd31374b071697a69faed
author Raymond Toy <rtoy@chromium.org> Mon Jan 22 17:03:07 2018
committer Commit Bot <commit-bot@chromium.org> Mon Jan 22 17:03:07 2018
tree 1c091f3d8fa9487911278b912132e3ece3d6d14c
parent ee539faa0097eef30896260458f02039b979125b

Keep AudioHandlers alive until they can be safely deleted.

When an AudioNode is disposed, the handler is also disposed.  But add
the handler to the orphan list so that the handler stays alive until
the context can safely delete it.  If we don't do this, the handler
may get deleted while the audio thread is processing the handler (due
to, say, channel count changes and such).

For an realtime context, save the handler if the context is not closed.
(Nothing will clean up the handler if the context is closed.)

For an offline context, only need to do this when the context is
running because the context is guaranteed to be stopped if we're not
in the running state.  Hence, there's no possibility of deleting the
handler while the graph is running.

Bug: 780919
Change-Id: Id8ba47f48504c5681121facebfc5acb85b05de87
Reviewed-on: https://chromium-review.googlesource.com/868841
Reviewed-by: Hongchan Choi <hongchan@chromium.org>
Commit-Queue: Raymond Toy <rtoy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#530892}