Allow WebrtcDummyVideoEncoder::RegisterEncodeCompleteCallback to take a nullptr.

Allow WebrtcDummyVideoEncoder::RegisterEncodeCompleteCallback to take a nullptr.

BUG=webrtc:7475
Review-Url: https://codereview.chromium.org/2898733002
Cr-Commit-Position: refs/heads/master@{#473819}
Committed: https://chromium.googlesource.com/chromium/src/+/6a4269379e171f3748617361e26c6fcc40bf0270

[brandtr-chromium, 2017-05-22 15:01:11]

The CQ bit was checked by brandtr@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-05-22 15:01:31]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-05-22 15:35:33]

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

[commit-bot: I haz the power, 2017-05-22 15:35:33]

Dry run: This issue passed the CQ dry run.

[brandtr-chromium, 2017-05-22 15:41:47]

brandtr@chromium.org changed reviewers:
+ sergeyu@chromium.org

[brandtr-chromium, 2017-05-22 15:41:48]

Hey Sergey, would you mind taking a look at this change?

The DCHECK here currently blocks this CL from landing in WebRTC:
https://codereview.webrtc.org/2901493002/.

The reason for setting the callback to nullptr in that CL is to try to ensure
that we do not get any callbacks after ::Release() is called. So far I haven't
seen any encoder implementations that do that, but better be safe than sorry.

https://codereview.webrtc.org/2901493002/diff/1/webrtc/modules/video_coding/c...

[Sergey Ulanov, 2017-05-22 22:19:19]

lgtm

[brandtr-chromium, 2017-05-23 05:37:57]

The CQ bit was checked by brandtr@chromium.org

[commit-bot: I haz the power, 2017-05-23 05:38:09]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-05-23 05:41:03]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1495517877362610, "parent_rev":
"d39d1cfa0ac52ed36acfb9ab3ae66e33ff61e20a", "commit_rev":
"6a4269379e171f3748617361e26c6fcc40bf0270"}

[commit-bot: I haz the power, 2017-05-23 05:41:14]

Description was changed from

==========
Allow WebrtcDummyVideoEncoder::RegisterEncodeCompleteCallback to take a nullptr.

BUG=webrtc:7475
==========

to

==========
Allow WebrtcDummyVideoEncoder::RegisterEncodeCompleteCallback to take a nullptr.

BUG=webrtc:7475

Review-Url: https://codereview.chromium.org/2898733002
Cr-Commit-Position: refs/heads/master@{#473819}
Committed:
https://chromium.googlesource.com/chromium/src/+/6a4269379e171f3748617361e26c...
==========

[commit-bot: I haz the power, 2017-05-23 05:41:15]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/6a4269379e171f3748617361e26c...