Revert of Add a webrtc{en,de}coderfactory implementation for VideoToolbox

Revert of Add a webrtc{en,de}coderfactory implementation for VideoToolbox (patchset #2 id:20001 of https://codereview.webrtc.org/2463313002/ )

Reason for revert:
Broke dependent project because the .gn changes weren't accompanied by corresponding .gyp changes.

Original issue's description:
> Add a webrtc{en,de}coderfactory implementation for VideoToolbox
> 
> This CL removes the coupling of the VideoToolbox h264 implementation
> to the generic h264 code. The files have been moved into sdb/obj/Framework
> and all dependency on them has been removed from the rest of WebRTC.
> We now add it as an external encoder via a factory supplied to the
> CreatePeerConnectionFactory call. This also brings the iOS implementation
> closer to what we do on Android for MediaCodec.
> 
> BUG=webrtc:6619
> 
> Committed: https://crrev.com/6a5047dad31f14f53dd9f8bc1ecde19e1dede2e4
> Cr-Commit-Position: refs/heads/master@{#14953}

TBR=magjed@webrtc.org,holmer@webrtc.org,stefan@webrtc.org,kthelgason@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:6619

[kwiberg-webrtc, 2016-11-08 16:49:34]

The CQ bit was checked by kwiberg@webrtc.org

[kwiberg-webrtc, 2016-11-08 16:49:34]

Created Revert of Add a webrtc{en,de}coderfactory implementation for
VideoToolbox

[commit-bot: I haz the power, 2016-11-08 16:49:46]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2016-11-08 16:51:34]

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

[commit-bot: I haz the power, 2016-11-08 16:51:35]

Try jobs failed on following builders:
  ios32_sim_dbg on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/ios32_sim_dbg/builds/12297)
  ios64_sim_dbg on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/ios64_sim_dbg/builds/12314)
  ios_arm64_rel on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/ios_arm64_rel/builds/14531)

[kwiberg-webrtc, 2016-11-08 18:46:04]

Landed a manually created revert instead
(https://codereview.webrtc.org/2483273002/), since this one didn't build
correctly. Seems like Rietveld's revert button failed to create a proper revert,
but I didn't take the time to compare the two diffs in any sort of detail.

[kwiberg-webrtc, 2016-11-08 18:46:18]

Description was changed from

==========
Revert of Add a webrtc{en,de}coderfactory implementation for VideoToolbox
(patchset #2 id:20001 of https://codereview.webrtc.org/2463313002/ )

Reason for revert:
Broke dependent project because the .gn changes weren't accompanied by
corresponding .gyp changes.

Original issue's description:
> Add a webrtc{en,de}coderfactory implementation for VideoToolbox
> 
> This CL removes the coupling of the VideoToolbox h264 implementation
> to the generic h264 code. The files have been moved into sdb/obj/Framework
> and all dependency on them has been removed from the rest of WebRTC.
> We now add it as an external encoder via a factory supplied to the
> CreatePeerConnectionFactory call. This also brings the iOS implementation
> closer to what we do on Android for MediaCodec.
> 
> BUG=webrtc:6619
> 
> Committed: https://crrev.com/6a5047dad31f14f53dd9f8bc1ecde19e1dede2e4
> Cr-Commit-Position: refs/heads/master@{#14953}

TBR=magjed@webrtc.org,holmer@webrtc.org,stefan@webrtc.org,kthelgason@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:6619
==========

to

==========
Revert of Add a webrtc{en,de}coderfactory implementation for VideoToolbox
(patchset #2 id:20001 of https://codereview.webrtc.org/2463313002/ )

Reason for revert:
Broke dependent project because the .gn changes weren't accompanied by
corresponding .gyp changes.

Original issue's description:
> Add a webrtc{en,de}coderfactory implementation for VideoToolbox
> 
> This CL removes the coupling of the VideoToolbox h264 implementation
> to the generic h264 code. The files have been moved into sdb/obj/Framework
> and all dependency on them has been removed from the rest of WebRTC.
> We now add it as an external encoder via a factory supplied to the
> CreatePeerConnectionFactory call. This also brings the iOS implementation
> closer to what we do on Android for MediaCodec.
> 
> BUG=webrtc:6619
> 
> Committed: https://crrev.com/6a5047dad31f14f53dd9f8bc1ecde19e1dede2e4
> Cr-Commit-Position: refs/heads/master@{#14953}

TBR=magjed@webrtc.org,holmer@webrtc.org,stefan@webrtc.org,kthelgason@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:6619
==========