Replace scoped_ptr with unique_ptr in webrtc/api/

Replace scoped_ptr with unique_ptr in webrtc/api/

But keep #including scoped_ptr.h in .h files, so as not to break
WebRTC users who expect those .h files to give them rtc::scoped_ptr.

BUG=webrtc:5520
Committed: https://crrev.com/d1fe281e12efd938683eae470bf01ce0d5ed3f9d
Cr-Commit-Position: refs/heads/master@{#12530}

[kwiberg-webrtc, 2016-04-27 12:05:30]

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

[tommi, 2016-04-27 13:19:02]

lgtm

[kwiberg-webrtc, 2016-04-27 13:26:42]

The CQ bit was checked by kwiberg@webrtc.org

[commit-bot: I haz the power, 2016-04-27 13:26:47]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1930463002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1930463002/1

[commit-bot: I haz the power, 2016-04-27 13:47:35]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-27 13:47:49]

Description was changed from

==========
Replace scoped_ptr with unique_ptr in webrtc/api/

But keep #including scoped_ptr.h in .h files, so as not to break
WebRTC users who expect those .h files to give them rtc::scoped_ptr.

BUG=webrtc:5520
==========

to

==========
Replace scoped_ptr with unique_ptr in webrtc/api/

But keep #including scoped_ptr.h in .h files, so as not to break
WebRTC users who expect those .h files to give them rtc::scoped_ptr.

BUG=webrtc:5520

Committed: https://crrev.com/d1fe281e12efd938683eae470bf01ce0d5ed3f9d
Cr-Commit-Position: refs/heads/master@{#12530}
==========

[commit-bot: I haz the power, 2016-04-27 13:47:49]

Patchset 1 (id:??) landed as
https://crrev.com/d1fe281e12efd938683eae470bf01ce0d5ed3f9d
Cr-Commit-Position: refs/heads/master@{#12530}