Revert of Add unit tests for RTCMTLVideoView.

Revert of Add unit tests for RTCMTLVideoView. (patchset #6 id:100001 of https://codereview.webrtc.org/2723903003/ )

Reason for revert:
This CL depends on a reverted CL.

Original issue's description:
> Add unit tests for RTCMTLVideoView.
> 
> To properly test the functionality,  following changes  were needed
> - Make RTCMTLVideoView compiliable for all cpu architectures not just arm64.
> This is needed so that the test can run on any device and on simulator as well.
> - Refactor RTCMTLVideoView to have  mockable class methods.
> The unittest class, RTCMTLVideoViewTests was designed to provide easy transition
> to XCTest when the time comes for that.
> To transition to XCTest it would suffice to inherit from XCTestCase and remove
> the gtest methods.
> 
> BUG=webrtc:7079
> 
> Review-Url: https://codereview.webrtc.org/2723903003
> Cr-Commit-Position: refs/heads/master@{#17014}
> Committed: https://chromium.googlesource.com/external/webrtc/+/0ebe0199acd1070f17ca2abc5bc22fdd8b0861ca

TBR=magjed@webrtc.org,denicija@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:7079
Review-Url: https://codereview.webrtc.org/2733953006
Cr-Commit-Position: refs/heads/master@{#17118}
Committed: https://chromium.googlesource.com/external/webrtc/+/96d91524fa66b9a2e4f9fbbbc9c5e5149021a3f0

[kthelgason, 2017-03-08 14:12:38]

The CQ bit was checked by kthelgason@webrtc.org

[kthelgason, 2017-03-08 14:12:38]

Created Revert of Add unit tests for RTCMTLVideoView.

[commit-bot: I haz the power, 2017-03-08 14:12:48]

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, 2017-03-08 14:33:53]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1488982358451160, "parent_rev":
"1d395dfb36e9ada73fc16aff09c4db3f3c3f17df", "commit_rev":
"96d91524fa66b9a2e4f9fbbbc9c5e5149021a3f0"}

[commit-bot: I haz the power, 2017-03-08 14:33:56]

Description was changed from

==========
Revert of Add unit tests for RTCMTLVideoView. (patchset #6 id:100001 of
https://codereview.webrtc.org/2723903003/ )

Reason for revert:
This CL depends on a reverted CL.

Original issue's description:
> Add unit tests for RTCMTLVideoView.
> 
> To properly test the functionality,  following changes  were needed
> - Make RTCMTLVideoView compiliable for all cpu architectures not just arm64.
> This is needed so that the test can run on any device and on simulator as
well.
> - Refactor RTCMTLVideoView to have  mockable class methods.
> The unittest class, RTCMTLVideoViewTests was designed to provide easy
transition
> to XCTest when the time comes for that.
> To transition to XCTest it would suffice to inherit from XCTestCase and remove
> the gtest methods.
> 
> BUG=webrtc:7079
> 
> Review-Url: https://codereview.webrtc.org/2723903003
> Cr-Commit-Position: refs/heads/master@{#17014}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/0ebe0199acd1070f17ca2abc5...

TBR=magjed@webrtc.org,denicija@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:7079
==========

to

==========
Revert of Add unit tests for RTCMTLVideoView. (patchset #6 id:100001 of
https://codereview.webrtc.org/2723903003/ )

Reason for revert:
This CL depends on a reverted CL.

Original issue's description:
> Add unit tests for RTCMTLVideoView.
> 
> To properly test the functionality,  following changes  were needed
> - Make RTCMTLVideoView compiliable for all cpu architectures not just arm64.
> This is needed so that the test can run on any device and on simulator as
well.
> - Refactor RTCMTLVideoView to have  mockable class methods.
> The unittest class, RTCMTLVideoViewTests was designed to provide easy
transition
> to XCTest when the time comes for that.
> To transition to XCTest it would suffice to inherit from XCTestCase and remove
> the gtest methods.
> 
> BUG=webrtc:7079
> 
> Review-Url: https://codereview.webrtc.org/2723903003
> Cr-Commit-Position: refs/heads/master@{#17014}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/0ebe0199acd1070f17ca2abc5...

TBR=magjed@webrtc.org,denicija@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:7079

Review-Url: https://codereview.webrtc.org/2733953006
Cr-Commit-Position: refs/heads/master@{#17118}
Committed:
https://chromium.googlesource.com/external/webrtc/+/96d91524fa66b9a2e4f9fbbbc...
==========

[commit-bot: I haz the power, 2017-03-08 14:33:56]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/external/webrtc/+/96d91524fa66b9a2e4f9fbbbc...

[kthelgason, 2017-03-09 11:36:48]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.webrtc.org/2743663002/ by kthelgason@webrtc.org.

The reason for reverting is: Dependant CL has been relanded.