Fix a test race - synchronize test completion to media's loadstart event.

Fix a race - synchronize test completion with media's loadstart event.

Presence of OOPIFs introduces a delay into loading of cross-origin media and
exposes a race in the
http/tests/security/mixedContent/insecure-audio-video-in-main-frame.html
test.  To get rid of the race, we should wait until media has actually
started to load, before posting / reporting that the test is "done".

BUG=582541
TEST=The affected test passes when run 100 times with and without --site-per-process flag.

Committed: https://crrev.com/7723a589545f0d5b59ad792f6285fe9cb5a46c7a
Cr-Commit-Position: refs/heads/master@{#376065}

[Łukasz Anforowicz, 2016-02-18 00:10:59]

Description was changed from

==========
Fix a test race - synchronize test completion to media's loadstart event.

Presence of OOPIFs introduces a delay into loading of cross-origin media and
exposes a race in the
http/tests/security/mixedContent/insecure-audio-video-in-main-frame.html
test.  To get rid of the race, we should wait until media has actually
started to load, before posting / reporting that the test is "done".

BUG=582541
==========

to

==========
Fix a race - synchronize test completion with media's loadstart event.

Presence of OOPIFs introduces a delay into loading of cross-origin media and
exposes a race in the
http/tests/security/mixedContent/insecure-audio-video-in-main-frame.html
test.  To get rid of the race, we should wait until media has actually
started to load, before posting / reporting that the test is "done".

BUG=582541
==========

[Łukasz Anforowicz, 2016-02-18 00:13:29]

Description was changed from

==========
Fix a race - synchronize test completion with media's loadstart event.

Presence of OOPIFs introduces a delay into loading of cross-origin media and
exposes a race in the
http/tests/security/mixedContent/insecure-audio-video-in-main-frame.html
test.  To get rid of the race, we should wait until media has actually
started to load, before posting / reporting that the test is "done".

BUG=582541
==========

to

==========
Fix a race - synchronize test completion with media's loadstart event.

Presence of OOPIFs introduces a delay into loading of cross-origin media and
exposes a race in the
http/tests/security/mixedContent/insecure-audio-video-in-main-frame.html
test.  To get rid of the race, we should wait until media has actually
started to load, before posting / reporting that the test is "done".

BUG=582541
TEST=The affected test passes when run 100 times with and without
--site-per-process flag.
==========

[Łukasz Anforowicz, 2016-02-18 00:13:35]

lukasza@chromium.org changed reviewers:
+ estark@chromium.org

[Łukasz Anforowicz, 2016-02-18 00:13:36]

Emily, can you take a look please?

[estark, 2016-02-18 00:56:28]

LGTM, thanks!

[Łukasz Anforowicz, 2016-02-18 00:57:09]

The CQ bit was checked by lukasza@chromium.org

[commit-bot: I haz the power, 2016-02-18 00:59:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1703333002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1703333002/1

[commit-bot: I haz the power, 2016-02-18 02:17:14]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-02-18 02:18:06]

Description was changed from

==========
Fix a race - synchronize test completion with media's loadstart event.

Presence of OOPIFs introduces a delay into loading of cross-origin media and
exposes a race in the
http/tests/security/mixedContent/insecure-audio-video-in-main-frame.html
test.  To get rid of the race, we should wait until media has actually
started to load, before posting / reporting that the test is "done".

BUG=582541
TEST=The affected test passes when run 100 times with and without
--site-per-process flag.
==========

to

==========
Fix a race - synchronize test completion with media's loadstart event.

Presence of OOPIFs introduces a delay into loading of cross-origin media and
exposes a race in the
http/tests/security/mixedContent/insecure-audio-video-in-main-frame.html
test.  To get rid of the race, we should wait until media has actually
started to load, before posting / reporting that the test is "done".

BUG=582541
TEST=The affected test passes when run 100 times with and without
--site-per-process flag.

Committed: https://crrev.com/7723a589545f0d5b59ad792f6285fe9cb5a46c7a
Cr-Commit-Position: refs/heads/master@{#376065}
==========

[commit-bot: I haz the power, 2016-02-18 02:18:06]

Patchset 1 (id:??) landed as
https://crrev.com/7723a589545f0d5b59ad792f6285fe9cb5a46c7a
Cr-Commit-Position: refs/heads/master@{#376065}