Switch use of CriticalSectionWrapper -> rtc::CriticalSection in call/

Switch use of CriticalSectionWrapper -> rtc::CriticalSection in call/
This is a first cl of removing use of CriticalSectionWrapper after a series of cleanup CLs that have been landing recently (and still are landing).

BUG=

Committed: https://crrev.com/63cb434691922ce44b988ad9f1d73bfecf31656e
Cr-Commit-Position: refs/heads/master@{#11316}

[tommi, 2016-01-20 09:20:15]

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

[tommi, 2016-01-20 09:20:21]

The CQ bit was checked by tommi@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2016-01-20 09:20:34]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1610553002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1610553002/1

[stefan-webrtc, 2016-01-20 09:24:14]

lgtm, thanks!

[commit-bot: I haz the power, 2016-01-20 10:21:05]

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

[commit-bot: I haz the power, 2016-01-20 10:21:05]

Dry run: This issue passed the CQ dry run.

[tommi, 2016-01-20 10:30:25]

The CQ bit was checked by tommi@webrtc.org

[commit-bot: I haz the power, 2016-01-20 10:30:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1610553002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1610553002/1

[commit-bot: I haz the power, 2016-01-20 10:32:59]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-01-20 10:33:07]

Description was changed from

==========
Switch use of CriticalSectionWrapper -> rtc::CriticalSection in call/
This is a first cl of removing use of CriticalSectionWrapper after a series of
cleanup CLs that have been landing recently (and still are landing).

BUG=
==========

to

==========
Switch use of CriticalSectionWrapper -> rtc::CriticalSection in call/
This is a first cl of removing use of CriticalSectionWrapper after a series of
cleanup CLs that have been landing recently (and still are landing).

BUG=

Committed: https://crrev.com/63cb434691922ce44b988ad9f1d73bfecf31656e
Cr-Commit-Position: refs/heads/master@{#11316}
==========

[commit-bot: I haz the power, 2016-01-20 10:33:08]

Patchset 1 (id:??) landed as
https://crrev.com/63cb434691922ce44b988ad9f1d73bfecf31656e
Cr-Commit-Position: refs/heads/master@{#11316}