Delete unused support for vp8 partitions.

Delete unused support for vp8 partitions.

This also makes it possible to drop the RTPFragmentationHeader from
the class VCMEncodedFrame.

BUG=None

Committed: https://crrev.com/6f112cc136bb8da01434747b6b0d0d56f69f271d
Cr-Commit-Position: refs/heads/master@{#14455}

[nisse-webrtc, 2016-09-29 12:29:09]

nisse@webrtc.org changed reviewers:
+ perkj@webrtc.org, stefan@webrtc.org

[nisse-webrtc, 2016-09-29 12:29:10]

Some questions:

Should there be more dangling code to delete here?

If VideoDecoder::Decode now always get an uninteresting RTPFragmentationHeader,
can we drop that argument and all handling of it?

And if we don't care about the RTPFragmentationHeader on the receive path, why
do we put it on the wire in the first place? 

It's a bit unclear to me if the code I'm touching is the only path for incoming
frames, or if there's some parallel path (new jitter buffer?) which does care
about the RTPFragmentationHeader. At least VCMGenericDecoder and
VideoDecoderSoftwareFallbackWrapper seems to be the only callers of that Decode
method.

[nisse-webrtc, 2016-09-29 12:52:20]

Replying to myself:

On 2016/09/29 12:29:10, nisse-webrtc wrote:

> If VideoDecoder::Decode now always get an uninteresting
RTPFragmentationHeader,
> can we drop that argument and all handling of it?

I've given it a try (not yet added to this cl). Straightforward, it seems
ignored everywhere, including in the h264 decoder.

[stefan-webrtc, 2016-09-30 08:39:48]

lgtm

[nisse-webrtc, 2016-09-30 09:15:29]

The CQ bit was checked by nisse@webrtc.org

[commit-bot: I haz the power, 2016-09-30 09:15:36]

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, 2016-09-30 10:43:03]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-30 10:43:09]

Description was changed from

==========
Delete unused support for vp8 partitions.

This also makes it possible to drop the RTPFragmentationHeader from
the class VCMEncodedFrame.

BUG=None
==========

to

==========
Delete unused support for vp8 partitions.

This also makes it possible to drop the RTPFragmentationHeader from
the class VCMEncodedFrame.

BUG=None

Committed: https://crrev.com/6f112cc136bb8da01434747b6b0d0d56f69f271d
Cr-Commit-Position: refs/heads/master@{#14455}
==========

[commit-bot: I haz the power, 2016-09-30 10:43:10]

Patchset 1 (id:??) landed as
https://crrev.com/6f112cc136bb8da01434747b6b0d0d56f69f271d
Cr-Commit-Position: refs/heads/master@{#14455}