Fix VideoFrame inclusion in mediastreaminterface.h

Fix VideoFrame inclusion in mediastreaminterface.h

This cl clean up unused forward declaration of cricket::AudioFrame and cricket::Renderer.
cricket::VideoFrame is used in the interface and thus the header file is included.
BUG=webrtc:5687
Committed: https://crrev.com/5d5833370f7c921899f557fec8a0f2a659901a5a
Cr-Commit-Position: refs/heads/master@{#13477}

[perkj_webrtc, 2016-07-14 12:16:11]

perkj@webrtc.org changed reviewers:
+ tommi@webrtc.org

[perkj_webrtc, 2016-07-14 12:16:11]

Can you please help review this cl? 
It should unblock an import.

[tommi, 2016-07-14 14:06:41]

lgtm

[perkj_webrtc, 2016-07-14 14:12:49]

The CQ bit was checked by perkj@webrtc.org

[commit-bot: I haz the power, 2016-07-14 14:12:52]

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, 2016-07-14 14:14:31]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-14 14:14:39]

Description was changed from

==========
Fix VideoFrame inclusion in mediastreaminterface.h

This cl clean up unused forward declaration of cricket::AudioFrame and
cricket::Renderer.
cricket::VideoFrame is used in the interface and thus the header file is
included.
BUG=webrtc:5687
==========

to

==========
Fix VideoFrame inclusion in mediastreaminterface.h

This cl clean up unused forward declaration of cricket::AudioFrame and
cricket::Renderer.
cricket::VideoFrame is used in the interface and thus the header file is
included.
BUG=webrtc:5687

Committed: https://crrev.com/5d5833370f7c921899f557fec8a0f2a659901a5a
Cr-Commit-Position: refs/heads/master@{#13477}
==========

[commit-bot: I haz the power, 2016-07-14 14:14:40]

Patchset 1 (id:??) landed as
https://crrev.com/5d5833370f7c921899f557fec8a0f2a659901a5a
Cr-Commit-Position: refs/heads/master@{#13477}