Refactor WVoE DTMF handling #1

- Remove cricket::VoiceChannel::PressDtmf(); AFAICT unused.
- Remove the DF_PLAY/DF_SEND flags, only allow sending.

BUG=webrtc:4690
Committed: https://crrev.com/1d63dd0eaa44d13c5ae083200937b18bce2132ae
Cr-Commit-Position: refs/heads/master@{#10872}

[the sun, 2015-12-02 13:28:22]

Description was changed from

==========
- Move DTMF functionality into AudioSendStream.
- Remove PressDtmf() from cricket::VoiceChannel.
- Remove the DF_PLAY/DF_SEND flags, only allow sending.

BUG=webrtc:4690
==========

to

==========
- Remove PressDtmf() from cricket::VoiceChannel.
- Remove the DF_PLAY/DF_SEND flags, only allow sending.

BUG=webrtc:4690
==========

[the sun, 2015-12-02 13:28:22]

solenberg@webrtc.org changed reviewers:
+ pthatcher@webrtc.org

[the sun, 2015-12-02 15:02:03]

Description was changed from

==========
- Remove PressDtmf() from cricket::VoiceChannel.
- Remove the DF_PLAY/DF_SEND flags, only allow sending.

BUG=webrtc:4690
==========

to

==========
- Remove cricket::VoiceChannel::PressDtmf(); AFAICT unused.
- Remove the DF_PLAY/DF_SEND flags, only allow sending.

BUG=webrtc:4690
==========

[pthatcher1, 2015-12-02 18:48:10]

lgtm

[the sun, 2015-12-02 18:52:46]

The CQ bit was checked by solenberg@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2015-12-02 18:52:57]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1487393002/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1487393002/40001

[commit-bot: I haz the power, 2015-12-02 19:52:02]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-12-02 19:52:03]

Dry run: This issue passed the CQ dry run.

[the sun, 2015-12-02 20:01:37]

The CQ bit was checked by solenberg@webrtc.org

[commit-bot: I haz the power, 2015-12-02 20:02:58]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1487393002/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1487393002/40001

[commit-bot: I haz the power, 2015-12-02 20:17:29]

Internal error: failed to checkout. Please try again.

[the sun, 2015-12-02 20:18:10]

The CQ bit was unchecked by solenberg@webrtc.org

[the sun, 2015-12-02 20:18:11]

The CQ bit was checked by solenberg@webrtc.org

[the sun, 2015-12-02 20:18:36]

The CQ bit was unchecked by solenberg@webrtc.org

[the sun, 2015-12-02 20:18:45]

The CQ bit was checked by solenberg@webrtc.org

[commit-bot: I haz the power, 2015-12-02 20:19:58]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-12-02 20:19:58]

Internal error: failed to checkout. Please try again.

[the sun, 2015-12-02 20:22:33]

The CQ bit was unchecked by solenberg@webrtc.org

[the sun, 2015-12-02 20:22:43]

The CQ bit was checked by solenberg@webrtc.org

[commit-bot: I haz the power, 2015-12-02 20:22:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1487393002/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1487393002/40001

[commit-bot: I haz the power, 2015-12-02 20:35:12]

Description was changed from

==========
- Remove cricket::VoiceChannel::PressDtmf(); AFAICT unused.
- Remove the DF_PLAY/DF_SEND flags, only allow sending.

BUG=webrtc:4690
==========

to

==========
- Remove cricket::VoiceChannel::PressDtmf(); AFAICT unused.
- Remove the DF_PLAY/DF_SEND flags, only allow sending.

BUG=webrtc:4690
==========

[commit-bot: I haz the power, 2015-12-02 20:35:12]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-12-02 20:35:22]

Description was changed from

==========
- Remove cricket::VoiceChannel::PressDtmf(); AFAICT unused.
- Remove the DF_PLAY/DF_SEND flags, only allow sending.

BUG=webrtc:4690
==========

to

==========
- Remove cricket::VoiceChannel::PressDtmf(); AFAICT unused.
- Remove the DF_PLAY/DF_SEND flags, only allow sending.

BUG=webrtc:4690

Committed: https://crrev.com/1d63dd0eaa44d13c5ae083200937b18bce2132ae
Cr-Commit-Position: refs/heads/master@{#10872}
==========

[commit-bot: I haz the power, 2015-12-02 20:35:23]

Patchset 3 (id:??) landed as
https://crrev.com/1d63dd0eaa44d13c5ae083200937b18bce2132ae
Cr-Commit-Position: refs/heads/master@{#10872}