Rent-A-Codec: Reference count the shared iSAC bandwidth estimation state

Rent-A-Codec: Reference count the shared iSAC bandwidth estimation state

Now that the Rent-A-Codec no longer owns the encoders and decoders it
produces, they may outlive it. It's thus no longer correct for the
Rent-A-Codec to own the bandwidth estimation state; all of the
involved objects need to share ownership.

BUG=webrtc:5028
Committed: https://crrev.com/0d05da7ee65f19b5ccc67c9d6567ac1ef63c13c8
Cr-Commit-Position: refs/heads/master@{#12159}

[kwiberg-webrtc, 2016-03-21 09:19:37]

kwiberg@webrtc.org changed reviewers:
+ henrik.lundin@webrtc.org

[kwiberg-webrtc, 2016-03-21 09:19:38]

This should have been done at the same time as the change that made the
Rent-A-Codec give away ownership of the encoders it creates. It's about to
become more important, now that use of the Rent-A-Codec is about to leave the
confines of the ACM.

[hlundin-webrtc, 2016-03-29 19:48:09]

lgtm

[kwiberg-webrtc, 2016-03-30 10:10:43]

The CQ bit was checked by kwiberg@webrtc.org

[commit-bot: I haz the power, 2016-03-30 10:10:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1821513003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1821513003/1

[commit-bot: I haz the power, 2016-03-30 11:10:16]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-30 11:10:23]

Description was changed from

==========
Rent-A-Codec: Reference count the shared iSAC bandwidth estimation state

Now that the Rent-A-Codec no longer owns the encoders and decoders it
produces, they may outlive it. It's thus no longer correct for the
Rent-A-Codec to own the bandwidth estimation state; all of the
involved objects need to share ownership.

BUG=webrtc:5028
==========

to

==========
Rent-A-Codec: Reference count the shared iSAC bandwidth estimation state

Now that the Rent-A-Codec no longer owns the encoders and decoders it
produces, they may outlive it. It's thus no longer correct for the
Rent-A-Codec to own the bandwidth estimation state; all of the
involved objects need to share ownership.

BUG=webrtc:5028

Committed: https://crrev.com/0d05da7ee65f19b5ccc67c9d6567ac1ef63c13c8
Cr-Commit-Position: refs/heads/master@{#12159}
==========

[commit-bot: I haz the power, 2016-03-30 11:10:24]

Patchset 1 (id:??) landed as
https://crrev.com/0d05da7ee65f19b5ccc67c9d6567ac1ef63c13c8
Cr-Commit-Position: refs/heads/master@{#12159}