Implement actually decoding frames in VTVideoDecodeAccelerator.

This adds translation from Annex B to AVCC format along with decoding
frames and binding them to textures.

It seems that kVTDecodeFrame_EnableTemporalProcessing is just a
suggestion to VideoToolbox, and one that it ignores. That means that,
for now, this code only outputs frames in the correct order for I-frame
only video.

BUG=133828

Review URL: https://codereview.chromium.org/397883002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287451 0039d316-1c4b-4281-b951-d872f2087c98
4 files changed