Reland of Support adding and removing MediaRecorder to camera 2 session.

Reland of Support adding and removing MediaRecorder to camera 2 session. (patchset #1 id:1 of https://codereview.webrtc.org/2844233002/ )

Reason for revert:
Revert "Revert of Support adding and removing MediaRecorder to camera 2 session. (patchset #5 id:80001 of https://codereview.webrtc.org/2833773003/ )"

Will fix external bots by cherry picking this CL and updating external functions which depend on CameraVideoCapturer interface

Original issue's description:
> Revert of Support adding and removing MediaRecorder to camera 2 session. (patchset #5 id:80001 of https://codereview.webrtc.org/2833773003/ )
> 
> Reason for revert:
> Breaks external bot
> 
> Original issue's description:
> > Support adding and removing MediaRecorder to camera 2 session.
> > 
> > Camera 1 API is not supported.
> > 
> > BUG=b/36684011
> > 
> > Review-Url: https://codereview.webrtc.org/2833773003
> > Cr-Commit-Position: refs/heads/master@{#17901}
> > Committed: https://chromium.googlesource.com/external/webrtc/+/2fc04769faec0031a202963eaeb602420a082c07
> 
> TBR=sakal@webrtc.org,glaznev@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=b/36684011
> 
> Review-Url: https://codereview.webrtc.org/2844233002
> Cr-Commit-Position: refs/heads/master@{#17905}
> Committed: https://chromium.googlesource.com/external/webrtc/+/6702739862e292f3556a9e63c71367f49c3895b4

TBR=sakal@webrtc.org,magjed@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=b/36684011

Review-Url: https://codereview.webrtc.org/2844393002
Cr-Commit-Position: refs/heads/master@{#17915}
Committed: https://chromium.googlesource.com/external/webrtc/+/37adc5e81e997634b60ff18f914332e10f6f3223

[AlexG, 2017-04-27 20:38:21]

The CQ bit was checked by glaznev@webrtc.org

[AlexG, 2017-04-27 20:38:22]

Created Reland of Support adding and removing MediaRecorder to camera 2 session.

[commit-bot: I haz the power, 2017-04-27 20:38:24]

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, 2017-04-27 20:38:29]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1493325501870980, "parent_rev":
"f0736b16f4e02c7d05f31acfd1bd911f3a74cc0d", "commit_rev":
"37adc5e81e997634b60ff18f914332e10f6f3223"}

[commit-bot: I haz the power, 2017-04-27 20:38:33]

Description was changed from

==========
Reland of Support adding and removing MediaRecorder to camera 2 session.
(patchset #1 id:1 of https://codereview.webrtc.org/2844233002/ )

Reason for revert:
Revert "Revert of Support adding and removing MediaRecorder to camera 2 session.
(patchset #5 id:80001 of https://codereview.webrtc.org/2833773003/ )"

Will fix external bots by cherry picking this CL and updating external functions
which depend on CameraVideoCapturer interface

Original issue's description:
> Revert of Support adding and removing MediaRecorder to camera 2 session.
(patchset #5 id:80001 of https://codereview.webrtc.org/2833773003/ )
> 
> Reason for revert:
> Breaks external bot
> 
> Original issue's description:
> > Support adding and removing MediaRecorder to camera 2 session.
> > 
> > Camera 1 API is not supported.
> > 
> > BUG=b/36684011
> > 
> > Review-Url: https://codereview.webrtc.org/2833773003
> > Cr-Commit-Position: refs/heads/master@{#17901}
> > Committed:
https://chromium.googlesource.com/external/webrtc/+/2fc04769faec0031a202963ea...
> 
> TBR=sakal@webrtc.org,glaznev@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=b/36684011
> 
> Review-Url: https://codereview.webrtc.org/2844233002
> Cr-Commit-Position: refs/heads/master@{#17905}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/6702739862e292f3556a9e63c...

TBR=sakal@webrtc.org,magjed@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=b/36684011
==========

to

==========
Reland of Support adding and removing MediaRecorder to camera 2 session.
(patchset #1 id:1 of https://codereview.webrtc.org/2844233002/ )

Reason for revert:
Revert "Revert of Support adding and removing MediaRecorder to camera 2 session.
(patchset #5 id:80001 of https://codereview.webrtc.org/2833773003/ )"

Will fix external bots by cherry picking this CL and updating external functions
which depend on CameraVideoCapturer interface

Original issue's description:
> Revert of Support adding and removing MediaRecorder to camera 2 session.
(patchset #5 id:80001 of https://codereview.webrtc.org/2833773003/ )
> 
> Reason for revert:
> Breaks external bot
> 
> Original issue's description:
> > Support adding and removing MediaRecorder to camera 2 session.
> > 
> > Camera 1 API is not supported.
> > 
> > BUG=b/36684011
> > 
> > Review-Url: https://codereview.webrtc.org/2833773003
> > Cr-Commit-Position: refs/heads/master@{#17901}
> > Committed:
https://chromium.googlesource.com/external/webrtc/+/2fc04769faec0031a202963ea...
> 
> TBR=sakal@webrtc.org,glaznev@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=b/36684011
> 
> Review-Url: https://codereview.webrtc.org/2844233002
> Cr-Commit-Position: refs/heads/master@{#17905}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/6702739862e292f3556a9e63c...

TBR=sakal@webrtc.org,magjed@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=b/36684011

Review-Url: https://codereview.webrtc.org/2844393002
Cr-Commit-Position: refs/heads/master@{#17915}
Committed:
https://chromium.googlesource.com/external/webrtc/+/37adc5e81e997634b60ff18f9...
==========

[commit-bot: I haz the power, 2017-04-27 20:38:34]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/external/webrtc/+/37adc5e81e997634b60ff18f9...