revert thread enable for ogv.  bug on video-cookie.html likely affects mp4 as well BUG=none TEST=./src/webkit/tools/layout_tests/run_webkit_tests.sh --debug http/tests/media/\* Review URL: http://codereview.chromium.org/3137020
revert thread enable for ogv.  bug on video-cookie.html likely affects mp4 as well
BUG=none
TEST=./src/webkit/tools/layout_tests/run_webkit_tests.sh --debug http/tests/media/\*
Review URL: http://codereview.chromium.org/3137020

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@56478 0039d316-1c4b-4281-b951-d872f2087c98

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