Mac Video Capture: Removed AVFoundation camera blacklisting.

Mac Video Capture: Removed AVFoundation camera blacklisting.

This blacklisting allowed certain cameras to be manipulated
using the QTKit API side by side to the AVFoundation API.
This is not needed anymore since the only blacklisted cameras,
namely the Blackmagic ones, are manipulated via third_party
Decklink SDK.

Note that not all traces of blacklisting disappear: QTKit
Blackmagic must avoid certain resolutions that would
otherwise crash the browser (see http://crbug.com/396812).

BUG=408493, 408089
TEST=After running Chrome, plug in a thunderbolt Blackmagic
device, for instance an UltraStudio Mini. Wait 4 seconds or so,
then enumerate devices, e.g. using http://goo.gl/r0lnFQ. There
should be a number of Blackmagic/UltraStudio mini entries but
no "QTKit " prefixed camera (those are the removed ones).

Committed: https://crrev.com/aaa0642e2eef28c9aba84d8ec50fe8b40a269f42
Cr-Commit-Position: refs/heads/master@{#299026}

[mcasas, 2014-10-09 12:21:18]

mcasas@chromium.org changed reviewers:
+ rsesek@chromium.org, vrk@chromium.org

[mcasas, 2014-10-09 12:21:19]

vrk@ PTAL/OWNERS RS

rsesek@: FYI/PTAL

[Robert Sesek, 2014-10-09 13:50:52]

LGTM

[vrk (LEFT CHROMIUM), 2014-10-09 23:08:31]

The CQ bit was checked by vrk@chromium.org

[vrk (LEFT CHROMIUM), 2014-10-09 23:08:32]

lgtm

[commit-bot: I haz the power, 2014-10-09 23:11:52]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/633373009/1

[commit-bot: I haz the power, 2014-10-10 00:37:47]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-10 00:38:49]

Patchset 1 (id:??) landed as
https://crrev.com/aaa0642e2eef28c9aba84d8ec50fe8b40a269f42
Cr-Commit-Position: refs/heads/master@{#299026}