Roll deps for ffmpeg security fixes and add new test case.

Roll deps for ffmpeg security fixes and add new test case.

Includes many upstream h264 fixes as well.

ffmpeg_revision:
http://src.chromium.org/viewvc/chrome?view=rev&revision=126470

ffmpeg_hash:
http://git.chromium.org/gitweb/?p=chromium/third_party/ffmpeg.git;a=commit;h=ddcf259fa5fb83159d441bd71f54e617e2a4afd3

Includes the following patches:
ddcf259 Update Windows binaries to pull in latest fixes.
707d08c h264: Fix invalid interlaced/progressive MB combinations for direct mode prediction.
d6e7e28 h264: error out on invalid bitdepth.
8b29ceb h264: prevent overreads in intra PCM decoding.
9d8f016 h264: fix mmxext chroma deblock to use correct TC values.
8052a84 h264: change underread for 10bit QPEL to overread.
f476438 h264: don't use redzone in loopfilter on win64.
400de19 Revert commit c98c1f434 due to webm regression.
ed45601 Move struc FFTContext below SECTION_RODATA
d881f5b Reverts removal of problen check in a2edf3dd.

BUG=117912
TEST=ffmpeg_regression_tests

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=126683

[DaleCurtis, 2012-03-13 21:53:23]

PTAL.

[rbultje1, 2012-03-13 22:57:55]

LGTM.