Revert of Revert of Remove accelerated hardware decode blacklist entry for Mac OS X.

Revert of Revert of Remove accelerated hardware decode blacklist entry for Mac OS X. (patchset #1 id:1 of https://codereview.chromium.org/853563003/)

Reason for revert:
Test failure corrected by:

https://crrev.com/81a119ffed1edbb462b51ed5b25a421bb9a03298
Cr-Commit-Position: refs/heads/master@{#311726}

Original issue's description:
> Revert of Remove accelerated hardware decode blacklist entry for Mac OS X. (patchset #2 id:20001 of https://codereview.chromium.org/849143002/)
>
> Reason for revert:
> This seems related to the regression here:
> https://build.chromium.org/p/chromium.gpu/builders/Mac%20Release%20%28Intel%29/builds/45738
>
> Original issue's description:
> > Remove accelerated hardware decode blacklist entry for Mac OS X.
> >
> > Now that VTVideoDecodeAccelerator exists, this entry is not necessary.
> >
> > BUG=133828
> >
> > Committed: https://crrev.com/c0e69446b02848fce2e311662a43b8e782304ae3
> > Cr-Commit-Position: refs/heads/master@{#311622}
>
> TBR=scherkus@chromium.org,sievers@chromium.org,sandersd@chromium.org
> NOTREECHECKS=true
> NOTRY=true
> BUG=133828
>
> Committed: https://crrev.com/17202a5a52388cf6e0807a243364f6c995eb82a1
> Cr-Commit-Position: refs/heads/master@{#311659}

TBR=scherkus@chromium.org,sievers@chromium.org,ricow@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=133828
Committed: https://crrev.com/f4e60796cf7b76ce3c313e3b507751fda3b340e3
Cr-Commit-Position: refs/heads/master@{#311727}

[sandersd (OOO until July 31), 2015-01-15 20:29:53]

Created Revert of Revert of Remove accelerated hardware decode blacklist entry
for Mac OS X.

[commit-bot: I haz the power, 2015-01-15 20:30:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/857433002/1

[commit-bot: I haz the power, 2015-01-15 20:31:20]

Committed patchset #1 (id:1)

[scherkus (not reviewing), 2015-01-15 20:31:37]

lgtm although my preference for re-landing CLs is to usually cherry-pick and
re-upload with an updated CL description

(if this CL has to get reverted we'd be looking at a
revert-of-revert-of-revert-of-revert-of-revert when you eventually re-re-land)

[commit-bot: I haz the power, 2015-01-15 20:32:38]

Patchset 1 (id:??) landed as
https://crrev.com/f4e60796cf7b76ce3c313e3b507751fda3b340e3
Cr-Commit-Position: refs/heads/master@{#311727}