Remove internal encoders from VCMCodecDatabase.

Remove internal encoders from VCMCodecDatabase.

Encoders need to be externally provided. To use software encoders they
need to be created and registered from the outside.

BUG=webrtc:1695
R=stefan@webrtc.org

Committed: https://crrev.com/ab73d13c4b632d8fa8cf6913e503d462567a40e3
Cr-Commit-Position: refs/heads/master@{#10283}

[pbos-webrtc, 2015-10-08 11:48:27]

PTAL

[stefan-webrtc, 2015-10-15 07:43:36]

lgtm

https://codereview.webrtc.org/1394823002/diff/1/webrtc/modules/video_coding/m...
File webrtc/modules/video_coding/main/source/codec_database.cc (right):

https://codereview.webrtc.org/1394823002/diff/1/webrtc/modules/video_coding/m...
webrtc/modules/video_coding/main/source/codec_database.cc:647: delete
ptr_encoder_;
Could you make this scoped?

[pbos-webrtc, 2015-10-15 09:58:38]

scoped_ptr

[pbos-webrtc, 2015-10-15 10:01:55]

Committed patchset #2 (id:20001) manually as
ab73d13c4b632d8fa8cf6913e503d462567a40e3 (presubmit successful).

[commit-bot: I haz the power, 2015-10-15 10:01:59]

Patchset 2 (id:??) landed as
https://crrev.com/ab73d13c4b632d8fa8cf6913e503d462567a40e3
Cr-Commit-Position: refs/heads/master@{#10283}