Massively speed up aspect ratio-detecting WebRTC tests.

Massively speed up aspect ratio-detecting WebRTC tests.

This improves the execution speed by a factor 3x, and I think they're
just as correct. Essentially we are waiting until we see a good
aspect ratio, rather than the old behavior which was to wait 10x50 ms
and see if we have a good aspect ratio. This wasn't a problem on fast
machines, but it's a big problem on bots with GPU emulation where
canvas operations are expensive.

BUG=417756
R=perkj@chromium.org,mcasas@chromium.org

Committed: https://crrev.com/d877c645673dfb198eef231f719395d5f7d6c634
Cr-Commit-Position: refs/heads/master@{#299073}

[perkj_chrome, 2014-10-09 14:43:22]

lgtm if the below is addressed.

https://codereview.chromium.org/638423002/diff/1/content/test/data/media/getu...
File content/test/data/media/getusermedia.html (left):

https://codereview.chromium.org/638423002/diff/1/content/test/data/media/getu...
content/test/data/media/getusermedia.html:435: clearInterval(detectorInterval);
I think you should clear the interval even if the test fails.

[phoglund_chromium, 2014-10-09 15:04:38]

https://codereview.chromium.org/638423002/diff/1/content/test/data/media/getu...
File content/test/data/media/getusermedia.html (left):

https://codereview.chromium.org/638423002/diff/1/content/test/data/media/getu...
content/test/data/media/getusermedia.html:435: clearInterval(detectorInterval);
On 2014/10/09 14:43:22, perkj wrote:
> I think you should clear the interval even if the test fails.

Done.

[phoglund_chromium, 2014-10-10 06:34:46]

The CQ bit was checked by phoglund@chromium.org

[commit-bot: I haz the power, 2014-10-10 06:35:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/638423002/40001

[commit-bot: I haz the power, 2014-10-10 07:36:50]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2014-10-10 07:37:35]

Patchset 3 (id:??) landed as
https://crrev.com/d877c645673dfb198eef231f719395d5f7d6c634
Cr-Commit-Position: refs/heads/master@{#299073}