Cleaned up deprecated elapsed_time methods and changed rotation to be webrtc::VideoRotation

Chrome has now been updated.

CapturedFrame
Removed deprecated elapsed_time.
Changed rotation to be webrtc::VideoRotation.

WebRTCVideoFrame
Removed deprecated InitToBlack
Removed deprecated constructors.

Committed: https://crrev.com/7755e2064b5b8add2ff0c9d0b5d3fb34ee1726d1
Cr-Commit-Position: refs/heads/master@{#10718}

[perkj_webrtc, 2015-11-19 13:55:51]

Description was changed from

==========
Cleaned up TODOS.
==========

to

==========
Chrome has now been updated.

CapturedFrame
Removed deprecated elapsed_time.
Changed rotation to be webrtc::VideoRotation.

WebRTCVideoFrame
Removed deprecated InitToBlack
Removed deprecated constructors.
==========

[perkj_webrtc, 2015-11-19 13:55:51]

perkj@webrtc.org changed reviewers:
+ guoweis@webrtc.org, magjed@webrtc.org

[perkj_webrtc, 2015-11-19 13:57:12]

Please?

[magjed_webrtc, 2015-11-19 14:49:46]

lgtm

[guoweis_webrtc, 2015-11-19 15:17:43]

On 2015/11/19 14:49:46, magjed_webrtc wrote:
> lgtm

lgtm

[perkj_webrtc, 2015-11-19 20:00:13]

The CQ bit was checked by perkj@webrtc.org

[commit-bot: I haz the power, 2015-11-19 20:00:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1461053002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1461053002/1

[commit-bot: I haz the power, 2015-11-19 20:02:25]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-19 20:02:44]

Patchset 1 (id:??) landed as
https://crrev.com/7755e2064b5b8add2ff0c9d0b5d3fb34ee1726d1
Cr-Commit-Position: refs/heads/master@{#10718}

[tfarina, 2015-11-20 18:09:01]

tfarina@chromium.org changed reviewers:
+ tfarina@chromium.org

[tfarina, 2015-11-20 18:09:02]

lgtm!

I started doing it today, but when I rebased my patch I noticed it was already
done. Thanks!