Remove use-after-free when quality tests stall.

Remove use-after-free when quality tests stall.

Reduces TSan warnings when running screenshare FullStack tests.

BUG=
R=sprang@webrtc.org

Committed: https://chromium.googlesource.com/external/webrtc/+/dd45eb68018a621a81ffa6983519573496efe185

[pbos-webrtc, 2016-01-19 13:36:50]

PTAL

[pbos-webrtc, 2016-01-19 13:37:28]

PTAL

https://codereview.webrtc.org/1601033004/diff/1/webrtc/video/video_quality_te...
File webrtc/video/video_quality_test.cc (left):

https://codereview.webrtc.org/1601033004/diff/1/webrtc/video/video_quality_te...
webrtc/video/video_quality_test.cc:246: ASSERT_GT(frames_processed,
last_frames_processed)
This ASSERT caused the function to abort before stats_polling_thread_.Stop()
could trigger.

[sprang_webrtc, 2016-01-19 14:12:32]

lgtm

[commit-bot: I haz the power, 2016-01-19 14:22:46]

Description was changed from

==========
Remove use-after-free when quality tests stall.

Reduces TSan warnings when running screenshare FullStack tests.

BUG=
R=sprang@webrtc.org
==========

to

==========
Remove use-after-free when quality tests stall.

Reduces TSan warnings when running screenshare FullStack tests.

BUG=
R=sprang@webrtc.org

Committed: https://crrev.com/dd45eb68018a621a81ffa6983519573496efe185
Cr-Commit-Position: refs/heads/master@{#11305}
==========

[commit-bot: I haz the power, 2016-01-19 14:22:47]

Patchset 1 (id:??) landed as
https://crrev.com/dd45eb68018a621a81ffa6983519573496efe185
Cr-Commit-Position: refs/heads/master@{#11305}

[pbos-webrtc, 2016-01-19 14:22:48]

Description was changed from

==========
Remove use-after-free when quality tests stall.

Reduces TSan warnings when running screenshare FullStack tests.

BUG=
R=sprang@webrtc.org

Committed: https://crrev.com/dd45eb68018a621a81ffa6983519573496efe185
Cr-Commit-Position: refs/heads/master@{#11305}
==========

to

==========
Remove use-after-free when quality tests stall.

Reduces TSan warnings when running screenshare FullStack tests.

BUG=
R=sprang@webrtc.org

Committed:
https://chromium.googlesource.com/external/webrtc/+/dd45eb68018a621a81ffa6983...
==========

[pbos-webrtc, 2016-01-19 14:22:49]

Committed patchset #1 (id:1) manually as
dd45eb68018a621a81ffa6983519573496efe185 (presubmit successful).